17-4PH / 15-5PH / 17-7PH Precision-Cut, Mill-Certified, Ready to Ship
AS9100D & ISO 9001:2015 Certified · Ex-Stock & Custom Sizes · Global Delivery in 15–30 Days
From aerospace fasteners & landing gear pins to medical device shafts, oil & gas pump components, and marine seawater pump housings — we supply PH stainless in the exact grade, aging condition, and tolerance your application demands. 12 grades in stock. Mill Test Reports (EN 10204 3.1) with every shipment.
PH Stainless Steel Grade Portfolio
12 precipitation hardening grades — martensitic, semi-austenitic, and ultra-high-strength custom alloys. Full standard and custom melts available.
Aerospace structural fasteners, landing gear components, oil & gas pump shafts, nuclear containers, food processing equipment. Workhorse PH grade — single-step aging, excellent machinability in Condition A.
Aircraft bulkheads & forgings, turbine components, heavy-section bars & discs. VIM+VAR melt — reduced delta-ferrite vs. 17-4PH ensures consistent through-thickness properties in large cross-sections.
Aerospace springs, diaphragms & bellows, precision flat parts, high-cycle fatigue components. Semi-austenitic; Al-hardened strip & wire achieves UTS >1655 MPa. Superior fatigue performance vs. 17-4PH in thin sections.
Aircraft structural parts, landing gear, high-stress missile airframes. Mo+Al hardening delivers outstanding KIc fracture toughness at strength levels unavailable in 17-4PH. VIM+VAR melt required per AMS 5629.
Aerospace structural members, chemical-resistant high-strength fasteners. Similar to 17-7PH but Mo addition provides enhanced chloride SCC resistance; preferred in aggressive marine and chemical environments.
Springs, high-strength strip & washers, aerospace defense components. Combines 15-5 corrosion resistance with 17-7 semi-austenitic hardenability. Mo addition improves pitting resistance over 17-7PH.
Aerospace structural sheet, pressure vessels, rocket motor cases. Very high strength-to-weight ratio; good oxidation resistance to 315°C. Weldable in annealed condition with low-hydrogen process.
Missile & space vehicle structures, gas turbine blades. Higher Ni content vs. AM-350 for improved cryogenic toughness. Superior high-temperature creep strength and retention of mechanical properties to 370°C.
Ultra-high-strength aircraft bolts, structural airframe parts, precision shafting. Ti+Cu aging at low temperature; excellent notch toughness at H900. Low-temperature aging minimizes quench distortion.
Next-gen aircraft structures, high-pressure vessels, critical shafting. Highest-strength PH stainless commercially available; KIc ≥110 MPa√m in H950 — exceptional balance of strength and fracture toughness.
Emerging aerospace structural and landing gear applications. Ultra-high-strength PH grade with improved SCC resistance over Custom 455®; targets aerospace qualification per AMS 2369.
Chemical process equipment, pumps, machinability-enhanced alternative to 17-4PH. Moderate strength with better corrosion resistance in acidic and chloride media. Excellent weldability in all conditions.
Technical Specifications
Chemical composition and mechanical properties per ASTM / AMS / EN international standards. Full MTR data available with every shipment.
Table A — Chemical Composition (wt.%)
| Limit | C | Mn | Si | P | S | Cr | Ni | Cu | Nb+Ta | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | — | — | — | — | — | 15.00 | 3.00 | 3.00 | 0.15 | Bal. |
| Max | 0.07 | 1.00 | 1.00 | 0.040 | 0.030 | 17.50 | 5.00 | 5.00 | 0.45 | Bal. |
Data per AMS 5643 Rev. N, ASTM A564/A564M. N ≤ 0.10% per AMS 5643. No intentional Mo, Ti, Al additions.
Table B — Minimum Mechanical Properties (Bar/Rod — AMS 5643 / ASTM A564)
| Condition | Aging Treatment | UTS min (MPa) | 0.2% YS min (MPa) | El. min (%) | RA min (%) | Hardness (HRC) |
|---|---|---|---|---|---|---|
| Cond. A | Solution anneal, as-supplied | ≥1069 | ≥793 | ≥8 | — | ≤38 |
| H900 | 482°C / 900°F, 1 h, AC | ≥1310 | ≥1170 | ≥10 | ≥40 | 40–47 |
| H925 | 496°C / 925°F, 4 h, AC | ≥1172 | ≥1103 | ≥10 | ≥44 | 38–43 |
| H1025 | 552°C / 1025°F, 4 h, AC | ≥1069 | ≥1000 | ≥12 | ≥45 | 33–38 |
| H1075 | 579°C / 1075°F, 4 h, AC | ≥1000 | ≥862 | ≥13 | ≥45 | 31–36 |
| H1100 | 593°C / 1100°F, 4 h, AC | ≥965 | ≥793 | ≥14 | ≥45 | 29–34 |
| H1150 | 621°C / 1150°F, 4 h, AC | ≥931 | ≥724 | ≥16 | ≥50 | 28–34 |
| H1150M | 760°C/2 h + 621°C/4 h (double age) | ≥862 | ≥655 | ≥18 | ≥55 | 26–32 |
Minimum values per AMS 5643 Rev. N & ASTM A564/A564M for bar, rod & shapes. AC = Air Cool. Certified test results on MTR (EN 10204 3.1) supplied with each shipment.
Table A — Chemical Composition (wt.%)
| Limit | C | Mn | Si | P | S | Cr | Ni | Cu | Nb+Ta | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | — | — | — | — | — | 14.00 | 3.50 | 2.50 | 0.15 | Bal. |
| Max | 0.07 | 1.00 | 1.00 | 0.040 | 0.030 | 15.50 | 5.50 | 4.50 | 0.45 | Bal. |
Data per AMS 5659, ASTM A564/A564M. N ≤ 0.05% per AMS 5659. Produced via VIM+VAR for reduced delta-ferrite and improved transverse properties in heavy sections.
Table B — Minimum Mechanical Properties (Bar/Rod — AMS 5659 / ASTM A564)
| Condition | Aging Treatment | UTS min (MPa) | 0.2% YS min (MPa) | El. min (%) | RA min (%) | Hardness (HRC) |
|---|---|---|---|---|---|---|
| H900 | 482°C / 900°F, 1 h, AC | ≥1310 | ≥1170 | ≥10 | ≥40 | 40–47 |
| H925 | 496°C / 925°F, 4 h, AC | ≥1172 | ≥1103 | ≥10 | ≥44 | 38–43 |
| H1025 | 552°C / 1025°F, 4 h, AC | ≥1069 | ≥1000 | ≥12 | ≥45 | 33–38 |
| H1075 | 579°C / 1075°F, 4 h, AC | ≥1000 | ≥862 | ≥13 | ≥45 | 31–36 |
| H1100 | 593°C / 1100°F, 4 h, AC | ≥965 | ≥793 | ≥14 | ≥45 | 29–34 |
| H1150 | 621°C / 1150°F, 4 h, AC | ≥931 | ≥724 | ≥16 | ≥50 | 28–34 |
Minimum values per AMS 5659 & ASTM A564/A564M. VIM+VAR melt ensures minimal delta-ferrite — ideal for forgings and thick bar >150 mm dia. Full MTR (EN 10204 3.1) with each shipment.
Table A — Chemical Composition (wt.%)
| Limit | C | Mn | Si | P | S | Cr | Ni | Al | Fe |
|---|---|---|---|---|---|---|---|---|---|
| Min | — | — | — | — | — | 16.00 | 6.50 | 0.75 | Bal. |
| Max | 0.09 | 1.00 | 1.00 | 0.040 | 0.040 | 18.00 | 7.75 | 1.50 | Bal. |
Data per AMS 5528/5529, ASTM A693 Grade 631. Semi-austenitic PH grade; Al replaces Cu/Nb as hardening agent. No intentional Nb, Cu, Mo, or Ti additions.
Table B — Minimum Mechanical Properties (Strip/Sheet — AMS 5528 / ASTM A693)
| Condition | Treatment Sequence | UTS min (MPa) | 0.2% YS min (MPa) | El. min (%) | Hardness |
|---|---|---|---|---|---|
| Cond. A | Solution anneal 1065°C, rapid cool | ≥1035 | ≥276 | ≥20 | ≤92 HRB |
| CH900 | Cold-work to Cond. C + age 482°C/1 h | ≥1655 | ≥1590 | ≥6 | ≥47 HRC |
| TH1050 | 955°C/1 h + sub-zero + 565°C/90 min | ≥1240 | ≥1030 | ≥9 | ≥38 HRC |
| RH950 | Cond. A + −73°C/8 h + 510°C/1 h, AC | ≥1448 | ≥1310 | ≥6 | ≥43 HRC |
Data per AMS 5528 Rev. F (strip/sheet) & ASTM A693 Gr. 631. CH900 requires prior cold work to "C" condition. Bar/rod properties per AMS 5529. Full MTR with each shipment.
Table A — Chemical Composition (wt.%)
| Limit | C | Mn | Si | P | S | Cr | Ni | Mo | Al | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | — | — | — | — | — | 12.25 | 7.50 | 2.00 | 0.90 | Bal. |
| Max | 0.05 | 0.10 | 0.10 | 0.010 | 0.008 | 13.25 | 8.50 | 2.50 | 1.35 | Bal. |
Data per AMS 5629, ASTM A564 Grade XM-13. Stringent C ≤0.05%, Mn ≤0.10%, Si ≤0.10% maximize cleanliness and toughness. VIM+VAR double-melt mandatory per AMS 5629.
Table B — Minimum Mechanical Properties (Bar/Rod/Forgings — AMS 5629 / ASTM A564)
| Condition | Aging Treatment | UTS min (MPa) | 0.2% YS min (MPa) | El. min (%) | RA min (%) | Hardness (HRC) |
|---|---|---|---|---|---|---|
| H950 | 510°C / 950°F, 4 h, AC | ≥1448 | ≥1310 | ≥10 | ≥50 | ≥43 |
| H1000 | 538°C / 1000°F, 4 h, AC | ≥1310 | ≥1207 | ≥12 | ≥55 | 40–44 |
| H1050 | 566°C / 1050°F, 4 h, AC | ≥1172 | ≥1069 | ≥14 | ≥55 | 37–42 |
| H1100 | 593°C / 1100°F, 4 h, AC | ≥1069 | ≥1000 | ≥15 | ≥60 | 33–38 |
| H1150 | 621°C / 1150°F, 4 h, AC | ≥965 | ≥862 | ≥16 | ≥60 | 30–35 |
Per AMS 5629, ASTM A564 Grade XM-13. Mo addition provides KIc fracture toughness 30–50% higher than 17-4PH at equivalent strength. Recommended for fatigue-critical and damage-tolerant designs. Full MTR with each shipment.
Available Forms & Sizes
All 12 grades available in standard mill product forms — stock and custom dimensions to specification
| Product Form | Standard Size Range | Tolerances | Surface / Finish |
|---|---|---|---|
| ⬤ Round Bar | Ø6 mm – Ø500 mm (¼" – 20") Length: up to 6,000 mm | h9–h11 (hot-rolled) h6 (centreless-ground) | Hot-rolled · Peeled · CNC-turned · Centreless-ground · Polished |
| ▬ Flat Bar | Thickness: 6–200 mm · Width: 20–600 mm Length: up to 6,000 mm | Per EN 10278 / ASTM A484 | Hot-rolled · Machined flat · Ground |
| ▪ Plate / Sheet | Thickness: 3–100 mm · Width: up to 1,500 mm Length: up to 6,000 mm | Per ASTM A480 / EN 10029 | Hot-rolled annealed (No.1) · Plasma/shear cut |
| 〰 Strip / Coil | Thickness: 0.1–4 mm · Width: 10–500 mm Coil OD: up to 1,500 mm | Per AMS 5528 / ASTM A693 | Cold-rolled · Bright Annealed (BA) · Cond. A |
| 〜 Wire | Ø0.1 mm – Ø12 mm Coil or straight lengths | Per ASTM A580 / AMS 5678 | Bright drawn · Annealed · Cond. A / CH |
| ⬡ Forging / Billet | Dia.: up to 800 mm Weight: up to 2,000 kg/piece | Per AMS 2375 / ASTM A484 | Rough-machined · As-forged · UT-tested |
Custom sizes available upon request — non-standard diameters, special lengths (up to 9,000 mm), close-tolerance turned/ground stock, or specific heat treatment conditions. Contact us with your print or specification.
Submit Your SpecificationsDelivery & Logistics
Reliable global supply chain — from our Fushun facility to your receiving dock
Lead Time
- Ex-Stock: 7–15 business days ex-works
- Custom / Special: 25–30 days ex-works
- Emergency (ex-stock): 3–5 days available
Minimum Order
- Ex-Stock: 1 piece / 1 bar minimum
- Custom Order: Min. 3 metric tons
- Qualification Samples: Available on request
Packaging
- Standard: Bundle with steel strapping
- Export: VCI anti-rust film + plywood / wooden case
- Bright/Ground: PE sleeve + wooden crate
Shipping Options
- Sea: FCL / LCL from Shanghai / Tianjin
- Air: DHL / FedEx / airline cargo
- Incoterms: FOB, CIF, CFR, EXW, DAP
Export Documents
- Commercial Invoice + Packing List
- Bill of Lading · Certificate of Origin
- MTR (EN 10204 3.1) · UT Report (on request)
Payment Terms
- T/T: 30% deposit + 70% before shipment
- L/C at sight: Accepted (≥ USD 50,000)
- Samples: PayPal / Western Union
Manufacturing Process & Capability
Complete process chain — from primary melt to final packaged product — under one AS9100D quality system
Melting VIM / VOD / VAR / ESR
Primary melt via Vacuum Induction Melting (VIM) or VOD. Aerospace and critical grades re-melted via VAR (Vacuum Arc Remelting) or ESR (Electroslag Remelting). Achieves ultra-low C, S, P levels with controlled non-metallic inclusion content. VIM+VAR melt practice mandatory per AMS 5629 (PH13-8Mo) and AMS 5659 (15-5PH).
Forging 3,000T Fast Forge Press
Multi-pass open-die forging on 3,000-ton hydraulic fast-forging press. Forging reduction ratio ≥ 4:1 eliminates center porosity and develops homogeneous wrought microstructure. Produces billets, bars, rings, and disc forgings up to Ø800 mm / 2,000 kg. All forging parameters logged and retained per AS9100D.
Hot Rolling & Drawing Rolling Mill
Computer-controlled hot rolling mill produces round bar, flat bar, and coil in precise dimensional tolerances. In-line temperature monitoring ensures consistent microstructure and surface quality. Cold drawing and wire drawing available for small-diameter product forms per ASTM A580.
Heat Treatment Automated Furnace · AMS 2750E
Fully automated heat treatment furnaces with calibrated thermocouples and data-logging per AMS 2750E (Pyrometry). Temperature uniformity ±5°C (TUS-surveyed). All standard aging conditions — H900 through H1150M — performed in-house with full temperature charts included in documentation.
Finishing CNC Turn · Grind · Peel
CNC turning centers, centreless grinding machines, and roller-die peeling lines deliver close-tolerance bright bar. Surface roughness Ra ≤ 0.8 µm (ground), Ra ≤ 3.2 µm (peeled/turned). Straightness ≤ 0.5 mm/m standard; precision ≤ 0.2 mm/m. Cut-to-length sawing ±1 mm.
Inspection & Testing QC Lab · NDT · OES Spectro
Chemical: OES optical emission spectrometry per heat + wet chemistry verification. Mechanical: Tensile per AMS 2370 / ISO 6892; Rockwell & Brinell hardness; Charpy impact at room temp and −40°C. NDT: 100% Ultrasonic Testing (UT) per AMS 2630 / ASTM A388 for aerospace grades; Eddy Current (ET) for bar/wire. Dimensional: CMM, laser micrometer.
Packaging & Dispatch Export Ready
Each item tagged with heat number, lot/batch number, grade, condition, and dimensions. MTR (EN 10204 3.1) generated per heat. VCI export packaging applied. Full documentation package — MTR, UT report, HT chart, CoO, invoice, packing list — compiled and dispatched with each shipment.
Our Fushun facility operates as one of China's largest specialty steel production bases, with annual capacity exceeding 50,000 metric tons of alloy and special steels. The production line is equipped with 3,000-ton hydraulic fast forging presses, fully automated data-logging heat treatment furnaces, and a dedicated aerospace-grade inspection laboratory operating under AS9100D.
For critical aerospace and defense applications, VIM+VAR double-melt material is available with full AMS certification. Melting records, forging parameter logs, and heat treatment charts are retained for a minimum of 10 years and are available for customer quality audits.
Industry Applications
PH stainless steel solving critical material challenges across global industries
Aerospace & Defense
17-4PH H900 and PH13-8Mo H950 are the primary choices for aircraft structural fasteners, landing gear actuator pins, missile airframe components, and hydraulic actuators. Meets AMS 5643, AMS 5629, MIL-S-81506, and Boeing/Airbus material specifications. DFARS-compliant documentation available.
Oil & Gas
17-4PH H1025 and H1150 conditions meet NACE MR0175 / ISO 15156 hardness limits for sour service. Widely used for downhole tool mandrels, valve stems, pump shafts, subsea connectors, and wellhead components. H1150M condition provides maximum SCC resistance for the most aggressive environments.
Medical Devices
17-4PH and 15-5PH in H1025/H1150 provide the corrosion resistance, machinability, and biocompatibility needed for surgical instrument shafts, orthopedic device tooling, and dental components. Semi-non-magnetic in solution-annealed condition. Compliant with ASTM F899 for surgical instrument materials.
Marine & Offshore
17-4PH H900 delivers the ideal combination of high strength (>1310 MPa UTS) and corrosion resistance for seawater pump shafts, valve stems, deck hardware, and subsea fasteners. Significantly stronger than 316L at comparable corrosion resistance. H1150 recommended for prolonged saltwater immersion service.
Food Processing & Chemical
H1150 and H1150M conditions provide the optimal combination of ductility, toughness, and corrosion resistance for food-grade conveyor shafting, agitator components, and pumps in acidic media — delivering strength and corrosion performance that exceeds standard 316L stainless.
Power Generation
17-4PH is widely used in turbine blade roots, pump shafting, and valve bodies in conventional and nuclear power plants. Custom 465® and PH13-8Mo are selected for components requiring >1450 MPa UTS combined with exceptional fatigue life in steam and high-pressure hydraulic environments.
Quality Assurance
Certified, traceable, and independently verified — because your critical application demands complete confidence in material data
Mill Test Report (EN 10204 3.1)
Every shipment is accompanied by a full MTR to EN 10204 Type 3.1, signed and stamped by our Quality Assurance Manager. Content: chemical analysis per heat (OES + wet chemistry), mechanical test results per lot, heat treatment records with temperature charts, and dimensional inspection sign-off.
Third-Party Inspection
We fully support pre-shipment inspection by: SGS, Bureau Veritas (BV), TÜV Rheinland, and Intertek. Services include witness testing (mechanical/chemical), dimensional inspection, visual examination, UT witnessing, and document review. Typically arranged within 3–5 business days notice.
Full Batch Traceability
Every bar, plate, strip, and forging is identified: Heat Number → lot/batch number → heat treatment batch record → NDT inspection record → dimensional inspection. Complete digital records retained for a minimum of 10 years and available for customer audit at any time.
Certifications & QMS
Quality Management System certified to AS9100D (Aerospace QMS) and ISO 9001:2015. Production and testing per AMS 2370 (mechanical testing), AMS 2630 (UT inspection), AMS 2750E (pyrometry / furnace qualification), and customer-specific quality plans for project requirements.
In-House Testing Laboratory
On-site laboratory with: OES optical emission spectrometer (per heat), universal tensile testing machines (per AMS 2370 / ISO 6892), Rockwell / Brinell / Vickers hardness testers, Charpy impact apparatus (−196°C to +200°C), metallographic suite, and digital UT flaw detection equipment.
DFARS & Regulatory Compliance
Material origin documentation available for DFARS requirements. Country of origin (China, Fushun) stated on all commercial documents. RoHS-compliant material formulations confirmed by chemical analysis. REACH compliance statements available for EU customers. Export license and HS tariff codes provided.
"Full traceability from melt to delivery — every bar, every batch. Our quality commitment is not a promise; it is documented, independently certified, and available for your audit at any time."
Frequently Asked Questions
Quick answers to the questions our global industrial customers ask most often
We certify to the full range: ASTM A564/A564M (bar), A693 (strip/sheet), A580 (wire); AMS 5643 (17-4PH bar), 5659 (15-5PH bar), 5528/5529 (17-7PH), 5629 (PH13-8Mo), 5578 (Custom 455), 5936 (Custom 465); EN/DIN 10088, 10278; JIS G4303/G4304/G4305 (SUS630, SUS631, SUS632). Customer-specific or OEM proprietary specifications (Boeing BMS, Airbus AIMS) can be accommodated for qualified orders — please submit your document for feasibility review.
Yes. We routinely supply qualification material — typically 1–5 pieces or 10–100 kg — for new customers conducting material qualification or coupon testing. Samples are priced at standard commercial rates with no surcharge, and supplied with full MTR documentation. We can cut to specific lengths or supply as-bar. Lead time for ex-stock samples is typically 7–10 business days including dispatch preparation.
Standard export packaging: bundles strapped with steel bands, wrapped in VCI anti-corrosion film, loaded in plywood or wooden crates for sea freight. Bright/ground bars are individually wrapped in PE sleeves before crating. We ship from Shanghai (CNSHA) and Tianjin (CNTXG) via FCL or LCL sea freight, or via air freight (DHL, FedEx, airline cargo) for urgent small orders. All standard Incoterms available: FOB, CIF, CFR, EXW, DAP.
Absolutely. We fully support inspection by SGS, Bureau Veritas, TÜV Rheinland, Intertek, or any customer-nominated organization. Services available: witness testing of mechanical and chemical properties, dimensional inspection, visual/surface examination, and UT witnessing at our Fushun facility. 3–5 business days advance notice is required for inspector coordination. Inspection fees are typically to the buyer's account per standard commercial practice.
For ex-stock items (standard grades, common bar sizes), ex-works lead time is 7–15 business days from order confirmation — including cutting, surface preparation, heat treatment (if specific aged condition ordered), final inspection, and document preparation. Custom orders (non-standard dimensions, special grades or melting practice) require 25–30 days ex-works. Emergency expediting of ex-stock items is sometimes possible in 3–5 business days. Sea freight transit adds 15–35 days depending on destination port.
Primary method is T/T (telegraphic transfer): 30% deposit on order confirmation, 70% balance before shipment against copy of B/L. For established customers, credit terms are negotiable. L/C at sight is accepted for orders ≥ USD 50,000 from a reputable international bank. For sample orders, PayPal and Western Union are also acceptable. Transactions in USD, EUR, or CNY.
Yes — material can be supplied in any standard aging condition: H900, H925, H1025, H1075, H1100, H1150, H1150M for 17-4PH and 15-5PH; CH900, TH1050, RH950 for 17-7PH; H950–H1150 for PH13-8Mo. All heat treatments are performed in-house in calibrated furnaces per AMS 2750E, with full temperature charts and hardness verification included in the MTR. Please specify required condition at time of inquiry.
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