‌631 alloy stainless steel‌, also known as 0Cr17Ni7Al or SUS631, is a semi-austenitic precipitation hardening stainless steel. Its chemical composition includes carbon (C) ≤0.09%, silicon (Si) ≤1.00%, manganese (Mn) ≤1.00%, sulfur (S) ≤0.030%, phosphorus (P) ≤0.035%, chromium (Cr) 16.00～18.00%, nickel (Ni) 6.50～7.75%, copper (Cu) ≤0.50% and aluminum (Al) 0.75～1.50%.

Performance characteristics
High strength and high hardness‌: After aging treatment, its tensile strength is significantly improved, for example, after aging treatment at 565℃, the tensile strength can reach 1140 MPa; after aging treatment at 510℃, the tensile strength can reach 1230 MPa‌.
‌Good corrosion resistance‌: It can maintain good performance in a variety of corrosive environments and is suitable for application scenarios that require high corrosion resistance‌.
‌Fatigue resistance‌: It is not easy to suffer fatigue damage under repeated stress, and is suitable for parts that need long-term stable work‌.

Application areas
‌Aerospace‌: Used to manufacture aircraft engine parts, landing gear, structural parts, etc. ‌Medical equipment‌: Used for surgical instruments, implants and other parts that require high strength and corrosion resistance‌. ‌Automobile manufacturing‌: Used to manufacture high-performance automotive parts such as engine parts and transmission systems‌. ‌Other industrial applications‌: It is also used in petrochemical, machinery, electricity, energy and other fields‌.

Q1.Can I have a sample order for stainless steel products?
A:Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.

Q2.What about the lead time?
A:Sample takes 3-5 days, production time takes 7-15days  for order quantity more than 28tons.

Q3.Do you have any MOQ limit for stainless steel products order?
A:Low MOQ, 1pc for sample checking

Q4.How do you ship and how long does it take to arrive?
A:For samples, we usually ship by DHL, UPS, FedEx or TNT, It usually takes 3-5 days to arrive. Airline and sea shipping are also optional. For mass products, ship freight is preferred.

Q5.Is it OK to print my logo on the product?
A:Yes.OEM and ODM can be provided for us.

Q6:Do you provide guarantee for the product?
A:Yes, we provide 5-10 years warranty for our products.

Q7:How to deal with the failure?
A: First of all, our products are produced under a strict quality control system, and the defective rate will be reduced by 0.2%.