631 stainless steel round bar

A stainless steel round bar made from 17-7 PH stainless steel offers excellent machinability and weldability, making it easy to fabricate into various components. This material's precipitation hardening capability allows it to be heat treated for different levels of strength and hardness.

Our 631 stainless steel round bar Ø260 is compliant with ASTM S17700 and AISI 631 specifications, providing a reliable solution for diverse applications.

17-7 PH is a chromium-nickel-aluminum precipitation hardening stainless steel known for its high strength, hardness, and moderate corrosion resistance up to 600°F. Similar to Type 301 stainless steel, it can be easily formed in its austenitic condition and hardened using relatively low heat treatments, which minimize distortion. The corrosion resistance of 17-7 PH is comparable to Type 304 stainless steel, particularly in the CH 900 temper. It is commonly used for spring applications, washers, eyelets, fittings, and fasteners.

The typical heat treatment process for 17-7 PH includes three or four steps:

1. Conditioning using austenite.
2. Cooling to convert austenite to martensite.
3. Precipitation hardening until Condition TH 1050 or RH 950 is achieved.

To attain the highest mechanical properties, Condition A material is transformed to martensite at the mill through cold reduction to Condition C. After user fabrication, a single low-temperature heat treatment is performed to achieve Condition CH 900.

Chemical Composition:
The stainless steel 17-7 alloy is one of the most popular martensitic stainless steel alloys, offering numerous benefits when manufactured into a stainless steel round bar:

• High strength
• Corrosion resistance
• High hardness
• Minimal distortion during heat treatment
• Fatigue resistance
• Excellent formability