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Help CenterHigh-carbon Spring Steel Wire From Chinese Factories, Used in Mattresses, is Inexpensive.
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Spring wire is a high-strength wire used for manufacturing various types of springs, typically made from high-quality carbon structural steel or alloy steel, such as SAE 9254, SAE 1070–1090 65Mn 60Si2MnA 50CrVA GB/T 4357 DH/DM ASTM A228 A227 9260 6150 JIS G3521 SWC G3522 SWPB SUP6 SUP10 EN 10270-1 DH/DM/SH 50CrV4 series, and C78D or C82D from DIN 17223. Through cold drawing, oil tempering, and other processes, this wire offers excellent elastic limits, fatigue strength, and relaxation resistance. Spring wire generally ranges from 0.1 mm to 16 mm in diameter and may have a plain, ground, or galvanized surface. For international standards or material properties, use the search term “spring wire specifications” for detailed information.
Main Applications
Spring wire is widely used in automotive, machinery, electronics, railway, and home appliance industries. In automobiles, it is used for suspension springs, valve springs, and brake springs; in electronics, for switches, connectors, and precision contacts; in railway vehicles, for shock absorber springs and buffer devices. Common European grades include C67S, C75S, and C85S from DIN 17223, while the US primarily follows SAE J316 and ASTM A227, A228 standards. For automotive suspension applications, search “suspension spring wire grade” to find suitable specifications.
Processing and Surface Treatment
After coiling, spring wire typically undergoes stress-relief annealing and surface protection treatments such as phosphating, galvanizing, or epoxy coating to enhance corrosion resistance and fatigue life. For precision springs, grinding or end-pointing of the wire may also be performed. Different processes impose strict limits on decarburization depth, ovality, and surface defects. To understand machining allowances and tolerance control, it is advisable to search using “spring wire tolerance chart” for standard reference tables.
International Trade and Selection Suggestions
In international sourcing, key factors to consider include tensile strength, modulus of elasticity, and relaxation rate, as well as confirmation of the corresponding standard system (e.g., ASTM, EN, DIN, JIS). For example, SAE 9254 corresponds to SWOSC-V in JIS G3566, while SH grade in EN 10270-1 can match C78D in DIN 17223. For technical comparison and substitution, use the search term “spring wire equivalent grade” for grade conversion. To find high-quality global suppliers or price quotes, use “spring wire suppliers Europe” for reliable resources.
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