ASTM A276 631 (UNS S17700) Stainless Steel Rod
Reliable 631 STAINLESS STEEL ROD Manufacturer IN CHINA
ASTM A276 631 (UNS S17700) is the premier choice for applications requiring exceptional high strength and good corrosion resistance. As a precipitation-hardening stainless steel, its remarkable mechanical properties can be achieved through heat treatment, making it significantly stronger than standard austenitic grades. This high-performance stainless steel provides a versatile and highly reliable solution for a wide range of demanding aerospace, defense, and industrial projects, delivering outstanding durability and performance that withstands the test of time.
Discover high-quality 631 stainless steel rod products here.
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Characteristics of 631 Stainless Steel
- Exceptional High Strength: Can be heat-treated to achieve extremely high tensile strength and hardness, making it ideal for high-stress components.
- Precipitation-Hardenable: Its mechanical properties are achieved through low-temperature heat treatments, which can be performed after fabrication.
- Good Formability: In its annealed condition (Condition A), this material exhibits excellent ductility.
- Excellent Corrosion Resistance: Offers corrosion resistance comparable to that of Type 304 stainless steel.
- Minimal Distortion on Hardening: The low-temperature heat treatment process ensures high dimensional stability in finished parts.
- High Fatigue Life: Its superior strength and toughness give it excellent fatigue properties.
- Elevated Temperature Service: Maintains its desirable high-strength properties at temperatures up to 316°C (600°F).
- Versatile High-Tech Applications: A preferred material for complex parts in the aerospace and chemical processing industries.
ASTM A276 631 (UNS S17700) Stainless Steel Technical Specifications
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.09 max |
| Chromium (Cr) | 16.0 - 18.0 |
| Nickel (Ni) | 6.5 - 7.75 |
| Aluminum (Al) | 0.75 - 1.50 |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Property | Condition A (Annealed) | Condition TH1050 | Condition RH950 |
|---|---|---|---|
| Tensile Strength (min) | - | 1240 MPa (180 ksi) | 1480 MPa (215 ksi) |
| Yield Strength (0.2% offset, min) | - | 1140 MPa (165 ksi) | 1310 MPa (190 ksi) |
| Elongation (in 2 in.) | 20% min | 5% min | 4% min |
| Hardness (Rockwell) | 92 HRB max | 38 HRC min | 44 HRC min |
| Property | Value |
|---|---|
| Density | 7.81 g/cm3 (0.282 lb/in3) |
| Modulus of Elasticity | 200 GPa (29.0 x 10⁶ psi) |
| Coefficient of Thermal Expansion (21-93°C) | 11.2 µm/m°C (6.2 µin/in°F) |
| Thermal Conductivity (at 100°C) | 16.4 W/m·K |
| Melting Range | 1404 - 1440°C (2560 - 2625°F) |
- UNS： S17700
- EN (European)： 1.4568
- JIS (Japanese)： SUS631
- AMS： 5644, 5528, 5529
- Common Trade Name： 17-7PH®
Common Applications of 631 Stainless Steel
Aerospace & Defense
High-Strength Springs & Fasteners
Chemical Processing & Industrial
Medical & Surgical Instruments
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631 Stainless Steel Rod Customization
In addition to standard stock, we offer comprehensive processing services to ensure products that meet your exact project requirements.
- Custom Dimensions: We offer precision cutting to deliver rods in your specific required lengths and provide centerless grinding.
- Heat Treatment Condition: Rods are available in various conditions, ranging from annealed or maximum formability to fully precipitation-hardened.
- Surface Finishing: Choose from multiple finishes, including cold-drawn, smooth-turned, polished, or a precision-ground finish.
- Machining Services: We provide value-added fabrication, including CNC machining, threading, chamfering, and drilling, to deliver components that are ready for assembly.
Contact our technical team to discuss your custom fabrication needs.
Contact Us
Your project’s success hinges on the use of superior materials. We supply certified ASTM A276 631 stainless steel rods that meet rigorous industry standards, ensuring absolute confidence in the performance and longevity of your application. As your dedicated partner, we utilize our vast inventory and advanced processing services to meet your exact specifications, from standard stock to fully customized and heat-treated components. We deliver not just a product, but a promise of unwavering quality and reliability for your most demanding projects.
Ready to begin? Contact our expert team for a detailed, no-obligation quote and professional material consultation. We are here to discuss your technical requirements and provide a tailored solution with competitive pricing and on-time delivery. Let us simplify your procurement process and help bring your project to life with the support it deserves. Send your inquiry now to secure the premium materials you need.
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