Corrosion Resistant Alloy Manufacturer
VIM · VAR · ESR · PESR · 6,000-Ton Forging · 50+ Countries
From Melting to Machining — All Under One Roof.
As a dedicated corrosion resistant alloy manufacturer, Fushun Special Steel delivers Hastelloy, Inconel, Monel, Incoloy, Alloy 20, and Sanicro 28 with metallurgical cleanliness and compositional precision that corrosion performance demands.
Corrosion Resistant Alloy Manufacturer — Why Engineers Choose Fushun
Over 26 years of dedicated expertise in nickel alloy manufacturing, with a vertically integrated production chain that no distributor can match.
Over 26 years of focused expertise in nickel alloy and special steel manufacturing for the world's most demanding chemical, marine, and energy applications.
Large-scale production ensures reliable supply continuity on both standard stock programs and large-volume custom orders — critical for capital project schedules.
An established global export network spanning North America, Europe, the Middle East, and Southeast Asia, with deep experience in international documentation and inspection.
EAF → LF → VD → VIM → VAR / ESR / PESR — one of the most complete remelting chains available from a single corrosion resistant alloy manufacturer.
Heavy hydraulic press plus precision radial forging machine for bar, billet, disc, ring, and tube-sheet preforms. Porosity and segregation — the roots of corrosion — are eliminated.
Full compliance capability across ASTM, EN, DIN, BS, ISO, and JIS — one corrosion resistant alloy manufacturer for your entire global project specification portfolio.
Metallurgical Cleanliness Is Not an Option — It Is the Foundation of Corrosion Performance
Corrosion resistance is not a surface property. Inclusions initiate pitting. Segregation disrupts the passive film. Sensitization opens grain boundaries to attack. Every stage of Fushun's process is engineered to eliminate these defects.
Primary Melting & Refining
Remelting & Purification
Heavy Forging
Finishing
Stage 1 — Primary Melting & Refining
The production route begins with our electric arc furnace: a high-efficiency, large-batch primary melting platform flexible enough to accommodate the full range of nickel alloy charge chemistries — from the iron-nickel base of Incoloy 825 to the high-molybdenum compositions of Hastelloy B-3 and C-276.
For corrosion resistant alloys, compositional accuracy at the ladle furnace stage is not merely a quality target — it is a corrosion performance prerequisite. The narrow elemental windows for Cr, Mo, Ni, W, Cu, and N must be held precisely, as even small deviations measurably degrade PREN values and reduce resistance to pitting and stress corrosion cracking. LF desulfurization directly improves resistance to sulfide stress cracking (SSC) in sour service.
Vacuum degassing removes dissolved hydrogen, nitrogen, and oxygen, significantly reducing gas content and the density of non-metallic oxide and nitride inclusions. Inclusions — particularly sulfide and oxide particles — are the preferential initiation sites for pitting and crevice corrosion. Removing them at the liquid metal stage prevents microscopic corrosion traps that no downstream surface treatment can fully address.
For high-nickel corrosion resistant alloys, VIM is the required primary melting route. The vacuum environment prevents oxidation of reactive additions — aluminum, titanium, and niobium — that would form oxide inclusions capable of disrupting the uniform passive film on which the alloy's corrosion resistance depends. VIM provides the clean, homogeneous electrode stock required as input for VAR, ESR, and PESR remelting.
Corrosion Resistant Alloy Remelting: VAR, ESR & PESR
Remelting is the most powerful tool for achieving the metallurgical cleanliness that demanding corrosion service requires. Inclusions, segregation, and compositional gradients are dramatically reduced through controlled remelting under vacuum or protective slag. Fushun operates all three principal remelting processes and selects the optimal route based on alloy chemistry, product form, and the specific corrosion mechanism the material must resist.
VAR under high vacuum eliminates macro-segregation, producing a chemically homogeneous microstructure in which corrosion-controlling elements — Mo, Cr, W, Cu — are uniformly distributed at the grain scale. A material locally depleted in molybdenum will pit preferentially at those locations regardless of the nominal specification. For Inconel 625, Incoloy 825, and the Hastelloy C-family, VAR remelting is the standard route to homogeneous passive layer integrity.
In ESR, the consumable electrode is remelted through a bath of molten synthetic slag formulated to absorb sulfur, oxygen, and non-metallic inclusions. The result is a dramatic reduction in inclusion content and sulfur level — directly improving resistance to the two most prevalent failure modes in sour oil and gas service: pitting corrosion initiated at MnS inclusions and sulfide stress cracking (SSC) driven by dissolved H₂S. ESR-processed alloys are specified for NACE MR0175 / ISO 15156 sour service compliance.
PESR extends conventional ESR by conducting the process under elevated inert gas pressure — typically argon — suppressing the evaporation of high-vapor-pressure alloying elements such as aluminum, titanium, and manganese. For corrosion resistant alloys with high Al and Ti additions, PESR is the only remelting route that simultaneously achieves maximum inclusion cleanliness and full recovery of the reactive elements responsible for passive film stability. PESR represents the highest attainable metallurgical quality standard for critical marine, nuclear, and severe chemical process service.
Stage 3 — Heavy Forging
For corrosion resistant alloys, heavy forging is not simply a shaping operation — it is a metallurgical transformation. The 6,000-ton press breaks down the as-solidified dendritic structure, closes internal porosity, and eliminates segregation bands throughout large-diameter bar and heavy disc and ring cross-sections. Porosity and segregation are not merely mechanical defects — they are preferential corrosion initiation sites. The press handles Hastelloy C-276, C-22, B-3, Inconel 625, Incoloy 825, and Monel K-500 in large-section form.
The radial forging machine enables precision near-net-shape production of bar and rod with tight tolerances and excellent surface finish. For corrosion resistant alloys destined for chemical process or marine service, surface quality is a functional requirement: roughness, residual tensile stress, and passive layer damage are all contributing factors in crevice corrosion initiation. The close-tolerance output minimizes downstream machining stock and lowers material input cost for our customers.
Stage 4 — Heat Treatment & CNC Machining
Heat treatment of corrosion resistant alloys has a different primary objective from high-temperature alloy processing: elimination of sensitization and recovery of maximum corrosion resistance. Sensitization — the precipitation of chromium carbides at grain boundaries — dramatically reduces resistance to intergranular corrosion and stress corrosion cracking. Fushun executes solution annealing, stabilization annealing, and stress relief in controlled-atmosphere furnaces per ASTM, NACE, and AMS procedures. Every batch is accompanied by furnace charts, load thermocouple data, and certificate of conformance.
Fushun's CNC machining department enables customers to order finished or semi-finished corrosion resistant alloy components directly against engineering drawings, eliminating multiple sub-supplier interfaces. Turning, milling, drilling, boring, and grinding are performed by operators experienced in the tooling, speeds, feeds, and coolant requirements of difficult-to-machine materials such as Hastelloy C-276, Inconel 625, and Monel K-500. All components are fully traceable to the original heat and remelting route.
Corrosion Resistant Alloy Products — Grades Selected by Corrosion Mechanism
The following grades are organized by primary corrosion resistance profile to support rapid, accurate alloy selection. All grades are supplied with full mill test reports, material certifications, and complete melting route traceability.
Resistance to Reducing Acids — Hydrochloric Acid, Hydrofluoric Acid, Sulfuric Acid
N10001The original Ni-Mo alloy for HCl service. Excellent resistance at all concentrations up to boiling point. Largely superseded by B-2 and B-3 but still referenced in legacy specifications.
N10665DIN 2.4617Reduced carbon and silicon minimize sensitization versus original Hastelloy B. Outstanding resistance to HCl, reducing sulfuric acid, acetic acid, and phosphoric acid. Used in HCl synthesis, chlorination reactors, and acid regeneration systems.
N10675DIN 2.4600NiMo28Current state-of-the-art Ni-Mo alloy. Maintains B-2's outstanding HCl and reducing acid resistance while significantly improving thermal stability — greatly reducing sensitization risk in welded HAZs. The preferred alloy for new-build reducing acid service equipment.
Resistance to Oxidizing & Mixed Acids — Hastelloy C-Family
N10276DIN 2.4819NiMo16Cr15WThe world's most widely used corrosion resistant alloy for severe chemical process service. Excellent resistance across oxidizing and reducing media: wet chlorine, ferric and cupric chloride solutions, hot contaminated mineral acids, and mixed acid environments. Standard material for FGD absorber towers, pharmaceutical reactors, and offshore process equipment.
N06022DIN 2.4602Improved pitting, crevice corrosion, and stress corrosion cracking resistance versus C-276. Superior performance in highly oxidizing environments such as hot sulfuric/nitric acid mixtures and wet chlorine. Increasingly specified as the default C-family alloy in new plant designs where the broadest possible corrosion resistance envelope is required.
N06455DIN 2.4610Thermally stable C-family alloy with iron and tungsten minimized to improve sensitization resistance at intermediate temperatures. Used in heat exchanger service and applications involving prolonged exposure in the sensitization temperature range.
Phosphoric Acid & High-Temperature Sulfuric Acid — Fertilizer & Phospho-Chemical
N06030N06035Specifically engineered for wet-process phosphoric acid — the most commercially important and corrosively aggressive form of phosphoric acid. Also excellent in sulfuric acid, sulfurous acid, and mixed fertilizer process streams. Preferred alloys for phosphoric acid evaporators, heat exchangers, and process piping in the fertilizer and phospho-chemical industries.
Resistance to Chloride Pitting, Crevice Corrosion & Stress Corrosion Cracking
N06625DIN 2.4856NiCr22Mo9NbVersatile Ni-Cr-Mo-Nb alloy with outstanding resistance to pitting and crevice corrosion in chloride-bearing environments and high strength across a wide temperature range. Extensively used in offshore flowlines, marine platform structures, seawater heat exchanger tube sheets, and chemical process piping. Niobium addition provides sensitization resistance in welded conditions.
N08825DIN 2.4858NiCr21MoFe-Ni-Cr alloy with Mo, Cu, and Ti additions for broad-spectrum aqueous corrosion resistance. Excellent in sulfuric and phosphoric acids, against chloride stress corrosion cracking and pitting. Titanium addition stabilizes against sensitization. Widely used in oil and gas production tubing, chemical process equipment, and nuclear fuel reprocessing.
N09925DIN 2.4852Age-hardenable version of Alloy 825 with significantly higher yield strength through precipitation hardening. Designed for oil and gas downhole applications requiring high strength plus SSC resistance per NACE MR0175. Used in wellhead components, valve bodies, hangers, and completion equipment.
N06690High-chromium nickel alloy with exceptional resistance to stress corrosion cracking in high-purity water environments and intergranular attack. Primary application in nuclear power plant steam generator tubing, where resistance to PWSCC and secondary-side corrosion is the key design requirement.
N06601DIN 2.4851Ni-Cr alloy with aluminum addition for outstanding high-temperature oxidation resistance combined with good aqueous corrosion resistance. Used in chemical process equipment, heat-treating fixtures, and industrial furnace components where resistance to both aqueous and high-temperature gaseous corrosion is required.
Resistance to Seawater & Marine Corrosion — Monel Series
N04400DIN 2.4360The classic Cu-Ni alloy for seawater service. Virtually immune to chloride stress corrosion cracking — the principal failure mode of stainless steels in marine environments. Excellent general corrosion resistance in seawater, brackish water, and hydrofluoric acid. Standard material for marine heat exchangers, seawater piping, and pump shafts.
N04404DIN 2.4867Low-magnetic-permeability variant of Monel 400, used in marine instruments and electronic housings where minimal magnetic response is required.
N04405DIN 2.4360Free-machining variant of Monel 400 with controlled sulfur addition for improved machinability. Used for precision-turned components, valve stems, and fasteners requiring the corrosion performance of Monel 400 with high machined surface quality.
N05500DIN 2.4375Age-hardenable Cu-Ni alloy combining the corrosion resistance of Monel 400 with approximately three times the yield strength in the precipitation-hardened condition. Used in offshore applications requiring seawater corrosion resistance plus high mechanical strength: pump shafts, impellers, valve stems, drill collars, and non-magnetic downhole tool components.
Organic Acids, Sulfuric Acid & Multi-Media Chemical Service
N08020DIN 2.4660X1NiCrMoCuNb20-18-3Fe-Ni-Cr-Mo-Cu alloy developed for maximum hot sulfuric acid resistance. Also excellent in phosphoric acid, mixed acids, and organic chemical environments. Niobium stabilization prevents sensitization in welded fabrications. Cost-effective alternative to higher-nickel C-family alloys in moderate sulfuric acid service. Widely used in chemical processing, food processing, and pharmaceutical manufacturing.
N08028DIN 1.4563X1NiCrMoCu32-28-3High-alloy austenitic stainless/nickel alloy for severe sulfuric acid service including hot concentrated sulfuric acid, mixed acid environments, and phosphoric acid. Developed specifically for phosphoric acid production equipment and sulfuric acid coolers where Alloy 20 is insufficient but full C-family alloys are cost-prohibitive.
N08031DIN 1.4562High-Cr, high-Mo, nitrogen-alloyed Ni-Fe-Cr alloy with a PREN value exceeding 54, placing it in the super-austenitic performance class. Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking in aggressive chloride-bearing environments, combined with good resistance to nitric and mixed acids.
High-Temperature Corrosion Resistance — Oxidation, Sulfidation & Carburization
N06600DIN 2.4816Foundational Ni-Cr alloy for high-temperature oxidizing and reducing atmospheres. Excellent resistance to oxidation, carburization, and nitridation at elevated temperatures. Used in heat-treating equipment, chemical processing, nuclear components, and industrial furnace hardware.
N06002DIN 2.4665NiCr22Fe18Mo9Ni-Cr-Fe-Mo alloy combining outstanding high-temperature oxidation resistance with good aqueous corrosion resistance. Standard alloy for gas turbine combustion hardware, industrial furnace components, and chemical process equipment in aggressive high-temperature gaseous environments.
N06230DIN 2.4733NiCr22W14MoTungsten-bearing solid-solution nickel alloy with exceptional long-term oxidation resistance and microstructural stability up to 1,150°C. Low thermal expansion coefficient reduces thermal fatigue in cyclically heated components. Primary application in industrial gas turbine combustors and aerospace high-temperature structural applications.
N08800N08810N088111.4876 / 1.4958 / 1.4959Industry-standard Fe-Ni-Cr alloys for high-temperature chemical processing service. Three variants with progressively controlled carbon and grain size for increasing creep life requirements up to 1,100°C. Used in steam reformer tubing, ethylene cracking furnaces, heat exchangers, and nuclear steam generator components.
Corrosion Resistant Alloy Available Product Forms
Have a grade or dimension in mind? Our technical sales team responds within 24 hours.
Request a Quote NowCorrosion Resistant Alloy Selection Guide — Match Your Environment to the Right Grade
Alloy selection depends on the specific corrosive medium, concentration, temperature, and presence of contaminants. This table provides a practical first-pass reference for the most common industrial corrosion environments. Contact our technical team for complex or mixed-media conditions.
| Corrosive Environment | Typical Conditions | Primary Recommendation | Alternative |
|---|---|---|---|
| Hydrochloric Acid (all concentrations) | Ambient to boiling, reducing | Hastelloy B-3 (N10675) | Hastelloy B-2 (N10665) |
| Sulfuric Acid — dilute to medium, reducing | Up to 70%, below 60°C | Hastelloy B-3, Alloy 20 | Incoloy 825 (N08825) |
| Sulfuric Acid — concentrated / high-temperature | Above 80% or above 80°C | Sanicro 28, Alloy 31 | Hastelloy C-276 |
| Phosphoric Acid (wet process) | All concentrations, elevated temperature | Hastelloy G-30 / G-35 | Alloy 20, Sanicro 28 |
| Hydrofluoric Acid | All concentrations, ambient to elevated | Monel 400, Hastelloy B-3 | — |
| Oxidizing Acids (nitric, chromic, mixed acid) | Various concentrations | Hastelloy C-22 (N06022) | Hastelloy C-276 |
| Mixed Acid Service (oxidizing + reducing) | Process-dependent | Hastelloy C-22 (N06022) | Hastelloy C-4 (N06455) |
| Chloride Pitting & Crevice Corrosion | Aqueous chloride, all concentrations | Inconel 625, Hastelloy C-276 | Incoloy 825 |
| Seawater — General Corrosion | Ambient to 80°C | Monel 400 (N04400), Inconel 625 | Incoloy 825 |
| Seawater — High-Strength Components | Shaft, fastener, structural | Monel K-500, Inconel 625 | — |
| Chloride Stress Corrosion Cracking | Aqueous chloride under tensile stress | Inconel 625, Monel 400 | Incoloy 825 |
| Sour Service — H₂S + CO₂ (NACE MR0175) | Downhole, oil & gas | Incoloy 925, Inconel 625 | Incoloy 825 |
| Organic Acids & Food-Grade Media | Acetic, formic, citric acid | Alloy 20 (N08020) | Incoloy 825 |
| High-Temperature Oxidation (gaseous) | Above 800°C | Inconel 601, Haynes 230 | Hastelloy X |
| Carburizing & Sulfidizing Atmospheres | Furnace / reformer service | Incoloy 800HT, Inconel 600 | Alloy 330 |
| FGD (Flue Gas Desulfurization) | SO₂ + HCl + oxidizing conditions | Hastelloy C-276 (N10276) | Hastelloy C-22 |
| Nuclear High-Purity Water (PWR) | Primary/secondary circuit | Inconel 690, Incoloy 800H | Inconel 600 |
ⓘ This table is a preliminary engineering guide. Final alloy selection should be confirmed with reference to corrosion test data and engineering specification requirements. Contact our technical team for application-specific recommendations.
Built for the Environments That Destroy Ordinary Materials
As a vertically integrated corrosion resistant alloy manufacturer, Fushun serves the industries where material failure carries the highest operational and safety consequences.
Chemical Processing & Petrochemicals
Reactors, heat exchangers, distillation columns, scrubbers, and piping systems handling mineral acids, organic acids, chlorinated solvents, and aggressive process fluids require alloys whose corrosion resistance is built-in at the metallurgical level — not applied as a surface coating. Fushun supplies Hastelloy B-3 and C-276 for the most aggressive acid environments, Alloy 20 and Sanicro 28 for sulfuric and phosphoric acid service, and Inconel 625 for chloride-bearing process streams.
Marine & Offshore Oil and Gas
Offshore structures, subsea equipment, and marine process systems face simultaneous corrosive aggression of seawater and the mechanical demands of high-pressure, high-temperature production service. All oil and gas materials are available with NACE-compliant documentation and ESR or PESR remelting for maximum SSC resistance.
Flue Gas Desulfurization (FGD)
FGD absorber towers and spray systems handling hot acidic slurries containing SO₂, sulfuric acid, hydrochloric acid, and chloride ions represent one of the most aggressive corrosion environments in industrial practice. Hastelloy C-276 has become the material of choice for FGD absorber linings, spray header systems, agitators, and slurry pumps by virtue of its uniquely broad resistance profile across oxidizing and reducing acid conditions.
Nuclear Energy
Nuclear applications impose the most stringent requirements for material traceability, metallurgical cleanliness, and documentation of any industry. Fushun's multi-step remelting capability — particularly PESR for the highest cleanliness requirement — combined with our fully documented, heat-specific production chain, supports supply to nuclear specifications.
Pharmaceutical & Food Processing
Pharmaceutical reactors, fermentation vessels, and food processing equipment require materials combining absolute resistance to product contamination with cleanable, polished surfaces that prevent microbial retention. Alloy 20 is the standard material for pharmaceutical sulfuric acid handling and multipurpose chemical reactors. All pharmaceutical-grade material is supplied with full compositional traceability and surface finish documentation required for cGMP compliance.
Pulp & Paper
The bleaching and chemical recovery circuits of pulp mills involve some of the most corrosive environments in industrial manufacturing: hot chlorine dioxide solutions, hypochlorite bleaching agents, caustic liquors, and sulfidic smelt dissolving systems. Hastelloy C-276 and Alloy 20 are the principal alloys for bleaching equipment, with Incoloy 825 used in sulfite and sulfate process streams.
Tell us your industry and process environment — we will confirm the right alloy and remelting route.
Describe Your Environment — Get a QuoteCorrosion Resistant Alloy Standards Cross-Reference — One Supplier for Your Global Specifications
Fushun supplies corrosion resistant alloys to all major international standards. The table below covers trade designations, UNS numbers, DIN material numbers, EN designations, and key ASTM product specifications. Cannot find your grade? Contact us with your UNS number or drawing reference and we will confirm availability within 24 hours.
| Trade Name | UNS | DIN | EN Designation | Key ASTM Specifications |
|---|---|---|---|---|
| Inconel 601 | N06601 | 2.4851 | — | B166, B167, B168, B564 |
| Inconel 625 | N06625 | 2.4856 | NiCr22Mo9Nb | B443, B446, B564 |
| Inconel 690 | N06690 | — | — | B163, B166, B167, B168 |
| Inconel 600 | N06600 | 2.4816 | — | B163, B166, B167, B168 |
| Monel 400 | N04400 | 2.4360 | — | B127, B163, B164, B165 |
| Monel 404 | N04404 | 2.4867 | — | B163, B164 |
| Monel R-405 | N04405 | 2.4360 | — | B164, B165 |
| Monel K-500 | N05500 | 2.4375 | — | B865 |
| Hastelloy B | N10001 | — | — | B333, B335 |
| Hastelloy B-2 | N10665 | 2.4617 | — | B333, B335, B564, B619, B622 |
| Hastelloy B-3 | N10675 | 2.4600 | NiMo28 | B333, B335, B564, B619, B622 |
| Hastelloy C (legacy) | — | — | — | Legacy / Historical |
| Hastelloy C-276 | N10276 | 2.4819 | NiMo16Cr15W / NiMo16Cr15Fe6W4 | B333, B335, B564, B574, B575, B619, B622, B626 |
| Hastelloy C-22 | N06022 | 2.4602 | — | B333, B335, B564, B574, B575, B619, B622 |
| Hastelloy C-4 | N06455 | 2.4610 | — | B333, B335, B564 |
| Hastelloy X | N06002 | 2.4665 | NiCr22Fe18Mo9 | B435, B564, B572 |
| Haynes 230 | N06230 | 2.4733 | NiCr22W14Mo | B435, B564, B572 |
| Alloy 20 / Incoloy 20 | N08020 | 2.4660 | X1NiCrMoCuNb20-18-3 | B462, B463, B464, B473, B474 |
| Sanicro 28 | N08028 | 1.4563 | X1NiCrMoCu32-28-3 | B564, B709 |
| Alloy 31 | N08031 | 1.4562 | — | B564 |
| Incoloy 925 | N09925 | 2.4852 | — | B564, B805 |
| Incoloy 800 | N08800 | 1.4876 | — | B163, B407, B408, B409, B514, B515, B564 |
| Incoloy 800H | N08810 | 1.4958 | — | B163, B407, B408, B409, B514, B515, B564 |
| Incoloy 800HT | N08811 | 1.4959 | — | B163, B407, B408, B409, B514, B515, B564 |
| Incoloy 825 | N08825 | 2.4858 | NiCr21Mo / NiFe30Cr21Mo | B163, B423, B424, B425, B515, B564 |
Cannot find your grade or specification? Send us your UNS number, EN designation, or drawing reference and we will confirm availability and the applicable production standard within 24 hours. — Technical Sales Team, Hunan Fushun Metal Co., Ltd.
Describe Your Environment — Contact Our Corrosion Resistant Alloy Manufacturer Team
Our technical sales engineers will review your process conditions, confirm the optimal alloy and production route, and provide a competitive quotation — typically within one business day. If uncertain of the best alloy, describe your corrosive medium and we will advise.
Contact Information
- Telephone
- +86-731-89903933
- Fax
- +86-731-89853933
- Address
- No. 1914–1919, Building C2, Yongsheng Commercial Plaza, No. 222 Labor East Road, Changsha, Hunan, China
- Response Time
- Within 24 hours on business days
Frequently Asked Questions
Answers to the most common technical and commercial questions from corrosion engineers and procurement teams worldwide.
