660 / S66286 / Alloy A-286 – High Temperature Special Steel Manufacturer
Welcome to FUSHUN SPECIAL STEEL, a premier manufacturer and supplier of high-performance special steels. We specialize in the production of 660 (S66286 / Alloy A-286), an iron-based superalloy known for its exceptional strength and corrosion resistance at elevated temperatures. As a direct manufacturer, we welcome large-scale industrial orders and ensure strict quality control from melting to final delivery.
For inquiries and quotes, please visit https://www.fushunspecialsteel.com.
1. Introduction and Applications of Grade 660 / S66286
Alloy A-286 (UNS S66286), also commonly referred to as Grade 660, is a precipitation-hardening, austenitic stainless steel designed for use at temperatures up to 1300°F (704°C), where high tensile strength, excellent creep strength, and good corrosion resistance are required. It is an iron-base alloy containing nickel and chromium, reinforced with titanium and aluminum for precipitation hardening.
At FUSHUN SPECIAL STEEL, we produce this alloy to meet rigorous industry demands. Its non-magnetic properties and high strength make it versatile for various critical sectors.
Key Applications:
- Aerospace: Jet engine components, fasteners, and springs.
- Power Generation: Industrial gas turbine components, blades, and vanes.
- Automotive: High-performance engine fasteners and supercharger components.
- Oil & Gas: Non-magnetic cryogenic equipment and deep-well drilling tools.
2. Chemical Composition
The chemical composition of S66286 is carefully controlled during our smelting process to ensure optimal response to heat treatment.
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | – | 0.08 |
| Manganese (Mn) | – | 2.00 |
| Silicon (Si) | – | 1.00 |
| Phosphorus (P) | – | 0.025 |
| Sulfur (S) | – | 0.025 |
| Chromium (Cr) | 13.50 | 16.00 |
| Nickel (Ni) | 24.00 | 27.00 |
| Molybdenum (Mo) | 1.00 | 1.50 |
| Titanium (Ti) | 1.90 | 2.35 |
| Aluminum (Al) | – | 0.35 |
| Vanadium (V) | 0.10 | 0.50 |
| Boron (B) | 0.003 | 0.010 |
| Iron (Fe) | Balance | |
3. Mechanical Properties
The mechanical properties of Alloy A-286 depend heavily on the heat treatment condition. Below are typical properties for solution treated and aged material (Type 2).
| Property | Typical Value (Room Temp) |
|---|---|
| Tensile Strength | ≥ 895 MPa (130 ksi) |
| Yield Strength (0.2% Offset) | ≥ 585 MPa (85 ksi) |
| Elongation | ≥ 15% |
| Reduction of Area | ≥ 20% |
| Hardness | 248 – 341 HBW |
4. Heat Treatment
Proper heat treatment is crucial to unlocking the potential of 660 / S66286. FUSHUN SPECIAL STEEL provides materials in various conditions, including solution annealed or fully aged.
- Solution Treatment: Heat to 980°C (1800°F), hold for 1 hour, followed by rapid cooling (oil or water quench). This dissolves the hardening phases.
- Aging (Precipitation Hardening): Heat to 700°C – 760°C (1300°F – 1400°F), hold for 16 hours, then air cool. This precipitates the Titanium/Aluminum phases that strengthen the alloy.
5. Similar Grades and Standards
Our production adheres to major international standards. We can certify our 660 steel to the following specifications:
| Region | Standard / Grade |
|---|---|
| USA (ASTM/AISI/UNS) | ASTM A453 Gr 660, UNS S66286, Alloy A-286, AMS 5731, AMS 5732, AMS 5737 |
| Europe (EN/DIN) | 1.4980, X6NiCrTiMoVB25-15-2 |
| UK (BS) | HR 51, HR 52 |
| Japan (JIS) | SUH 660 |
| China (GB) | 0Cr15Ni25Ti2MoAlVB |
6. Supply Forms and Dimensions
As a comprehensive manufacturer, FUSHUN SPECIAL STEEL offers flexible supply options. We can produce Hot Rolled and Hot Forged materials.
Check our full product range at https://www.fushunspecialsteel.com.
| Shape | Process | Size Range (mm) |
|---|---|---|
| Round Bar | Hot Rolled | Ø 16mm – Ø 150mm |
| Round Bar | Forged | Ø 150mm – Ø 800mm |
| Flat Bar / Block | Forged / Rolled | Thickness: 20mm – 400mm Width: 50mm – 800mm |
| Plate / Sheet | Hot Rolled | Thickness: 5mm – 100mm |
| Wire / Coil | Cold Drawn | Ø 1.0mm – Ø 15mm |
*Custom sizes and specific tolerance requirements are available upon request. Please contact our sales team for details.*
7. Why Choose FUSHUN SPECIAL STEEL?
We are not just a trader; we are a manufacturer with complete control over the production lifecycle. Here are our core advantages:
1. Advanced Smelting Technology
For high-end alloys like S66286, purity is paramount. We utilize EAF + LF + VD for basic melting, followed by ESR (Electro-Slag Remelting), VIM (Vacuum Induction Melting), and VAR (Vacuum Arc Remelting). This ensures low gas content, minimal inclusions, and superior microstructure.
2. In-House Heat Treatment
We possess our own industrial heat treatment furnaces. This allows us to precisely control solution annealing and aging processes, ensuring the mechanical properties (yield strength, hardness) meet your exact specifications without relying on third parties.
3. Machining Services
To save our customers time and costs, FUSHUN SPECIAL STEEL offers value-added services. We can provide materials that are Turned (Peeled), Milled, or Grinded. This “Ready-to-Use” surface condition reduces your machining workload.
4. Manufacturer Direct & Fast Delivery
Buying directly from the factory means competitive pricing and better communication. We maintain a stock of ingots and semi-finished billets, allowing us to fulfill orders with short lead times. We welcome bulk orders from global distributors and end-users.
Contact Us Today
For premium 660 / S66286 Alloy A-286 steel, trust the experts at Fushun Special Steel Co., Ltd.
Email: info@fushunspecialsteel.com
Website: https://www.fushunspecialsteel.com
