Import 17-7ph Sus631 S17700 Din1.4568 Spring Wire — Buy in Bulk from Supplier in China

This 17-7PH precipitation-hardening martensitic stainless steel spring wire, designated SUS631 under JIS standards and UNS S17700, is supplied by Sunrise Industry Engineering Ltd. from their base in Shanghai. The material conforms to DIN 1.4568 and is engineered for applications demanding a specific combination of high strength, good corrosion resistance, and excellent fatigue performance. Its mechanical properties are developed through a precise heat treatment process involving austenite conditioning, cooling, and a final precipitation hardening step.

The wire is typically produced from a chromium-nickel-aluminium alloy composition. Common industry specifications for this grade include a tensile strength range often exceeding 1500 MPa in the heat-treated condition and good formability in the annealed state for coiling and shaping. It is available in various diameters to suit different spring designs, with typical packaging on spools or coils to prevent tangling during transit. The material's ability to retain strength at moderately elevated temperatures makes it distinct from standard austenitic stainless steels.

Primary buyers include manufacturers of aerospace components, high-performance automotive valve springs, and precision instruments requiring reliable elastic memory. Sourcing this wire from a Shanghai-based supplier like Sunrise Industry Engineering Ltd. provides access to a major industrial hub. Buyers should confirm the exact available diameters, coil weights, and the specific heat treatment condition (e.g., Condition TH1050 or RH950) with the supplier to match their production requirements, as these details are critical for final product performance.

Sunrise Industry Engineering Ltd. is listed as an imported supplier with its operational address at No.1381, Dongfang Road, Shanghai 200001, China. This positions the company within one of China's principal commercial and industrial centres. The supplier's profile on the platform indicates a 'harbor' trust tier, which typically denotes a basic level of verification.

The listing for 17-7PH spring wire does not provide specific details about the company's founding history, production capacity, number of employees, or client portfolio. The response rate is currently listed as 0.00%, meaning prospective buyers have no recorded data on typical reply times. For any commercial engagement, it would be prudent to request direct confirmation of the company's export experience, quality control procedures for specialty alloys, and available trade documentation before proceeding.