There are "spring type" and "valve spring type" in the iron-based spring material "oil-tempered wire."
The material used is "Silicon Chrome Steel Oil Tempered Wire for Valve Springs (SWOSC-V)." The wire thickness is Φ4.2. There are two types of oil-tempered wire for iron-based spring materials: "spring use" and "valve spring use." While the base material for "spring use" is hard steel wire, "valve spring use" employs piano wire as the base material, with strict quality standards established due to impurities in the steel and surface conditions. Thus, "valve spring use" is considered a higher-grade material. "SWOSC-V" is the most durable material among spring materials conforming to JIS standards. It is chosen when the durability of the iron-based spring material "piano wire" does not meet requirements. However, it is a material that is easily affected by hydrogen embrittlement, so plating treatment is not allowed. Therefore, the valve spring in the photo has been treated with electrodeposition coating as a rust prevention measure. If you have any concerns regarding springs, please feel free to consult us. Our technical staff will respond carefully. Tsurugaoka Spring Co., Ltd. for springs Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com 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