77B spring steel wire has a high elastic limit, allowing the wire to withstand substantial elastic deformation without readily developing permanent deformation. Its favorable fatigue performance also makes it suitable for components subjected to recurring cyclic loads.
The material's tensile strength is generally in the range of 1600–2000 MPa, although the actual value depends on factors such as wire diameter and the manufacturing process used.
For 77B spring steel wire, cold drawing is only one stage of processing. More controlled heat-treatment procedures, including quenching and tempering, can be used to obtain a more suitable combination of mechanical properties.
During heat treatment, the microstructure of the steel wire is adjusted to improve its overall performance. Depending on the processing requirements, this can contribute to:
● Higher elastic limit
● Improved fatigue strength
● Better toughness
● More consistent mechanical properties
● Greater suitability for repeated-load spring applications
For spring manufacturers, this means the processing route is an important consideration alongside the steel grade itself.
The combination of high tensile strength and elastic performance allows 77B wire to serve a variety of spring-making requirements.
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Industry |
Spring Components |
Typical Application Requirements |
|
Automotive |
Seat springs, clutch springs, suspension springs |
Repeated loading, high elastic recovery and long-term mechanical performance |
|
Industrial Machinery |
Die springs, machine-tool fixture springs |
High working stress, repeated compression and stable elastic response |
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Electronics |
Mobile phone vibration motor springs, switch springs |
Compact dimensions, repeated movement and consistent spring action |
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Instruments & Meters |
Precision spring components |
Reliable elastic response and dimensional consistency |
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Toys |
Small coil springs and other elastic components |
Repeated deformation and stable recovery during operation |
|
Stationery |
Small spring components, return springs |
Frequent movement, compact structure and consistent elasticity |
Established in 1995, Luguan operates a 30,000-square-meter factory with more than 50 employees and an annual output of approximately 60,000 tons.
The company's manufacturing scope covers several types of steel wire, including spring steel wire, 77B–82B prestressed steel wire, 30MnSi screen mesh steel wire, mattress steel wire and Q195/Q235 low-carbon cold-drawn wire.
With production, heat-treatment and testing equipment available in-house, Luguan focuses on supplying steel wire for manufacturers that require stable material quality and responsive technical communication.
It is a high-strength steel wire used for manufacturing springs and other elastic components. It features a high elastic limit, favorable fatigue performance and tensile strength generally ranging from 1600 to 2000 MPa, depending on wire diameter and processing conditions.
The tensile strength is generally around 1600–2000 MPa, with the actual value varying according to wire diameter and manufacturing process.
Quenching and tempering can help adjust the microstructure and improve the combination of elastic limit, fatigue strength, toughness and other mechanical properties.
It can be used for automotive seat springs, clutch springs, suspension springs, die springs, machine-tool fixture springs, small electronic springs and other elastic components.
Yes. Applications include automotive seat springs, clutch springs and suspension springs, subject to the specific design and performance requirements of the component.
Luguan manufactures and processes spring steel wire, 45#–70# steel wire, 65Mn spring steel wire, mattress steel wire, 77B–82B prestressed steel wire, 30MnSi screen mesh steel wire, and Q195/Q235 low-carbon cold-drawn wire.
Address
Hongyun Economic & Technological Development Zone, Qingyun Hongyun Economic Development Zone, Qingyun County, Dezhou City, Shandong Province, China
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