SUS631 requires a heat treatment called precipitation hardening (aging treatment).
The material used is "spring stainless steel sheet SUS631-CSP." It is a material that excels in strength and heat resistance compared to the general-purpose SUS spring material "SUS304-CSP." After spring forming, a heat treatment at 475 degrees for 60 minutes is applied to ensure the specified strength. This heat treatment is called precipitation hardening or aging treatment, and it is a process similar to quenching. Our specialties are round wire springs and forming, but we also manufacture and source flat springs. The materials we have a proven track record with are as follows: ■ Quenched ribbon steel (SK85-CSP-H) ■ Bainite steel sheet (C60C-CSP-B) ■ Stainless steel strip for springs (SUS304-CSP, SUS631-CSP, SUS301-CSP) ■ Phosphor bronze sheet (C5191P), spring phosphor bronze sheet (C5210P) ■ Beryllium copper sheet for springs (C1720P) If you have any issues with springs, please feel free to consult us. Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. for springs. We also support web meetings.
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Tsuruga Spring Co., Ltd. is a spring manufacturer located in Tsuruoka City, Yamagata Prefecture. We specialize in the design and manufacturing of coil springs, as well as wire forming processing. 1) Our strength lies in our ability to respond quickly from design to prototyping. Are you facing issues such as springs breaking, deforming, or being weak? Our technical staff will respond carefully, so please feel free to consult with us. It's okay even if you don't have drawings. 2) We can accommodate a wide range of wire thicknesses from 0.1mm to 10.0mm. We stock piano wire, stainless steel wire for springs, oil-tempered wire, and phosphor bronze wire. We can also handle special spring materials that are outside JIS standards, such as Herculite and SWIC. Additionally, we can accommodate wire diameters exceeding 10mm through outsourcing. 3) We accept orders from one piece to tens of thousands of pieces. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. 〒997-0011 3-10-25 Takarada, Tsuruoka City, Yamagata Prefecture