70 carbon spring steel wire belongs to the high-carbon carbon spring steel category. Its material composition gives it a useful combination of strength and formability rather than focusing solely on maximum tensile strength.
The typical chemical composition provided for this grade includes:
|
Element |
Typical Content |
|
Carbon (C) |
0.67%–0.75% |
|
Silicon (Si) |
0.17%–0.37% |
|
Manganese (Mn) |
0.50%–0.80% |
70 carbon spring steel wire is often selected when a spring needs more than basic elasticity but does not necessarily require the highest-strength spring steel available.
Its characteristics include a favorable elastic limit, good tensile strength and moderate wear resistance. Another useful feature is its formability, which allows the wire to be shaped into springs with relatively complicated geometries.
After forming, suitable springback helps the finished component maintain its intended shape.
This makes 70 carbon spring steel wire particularly relevant to manufacturers producing a variety of small and medium-sized elastic components rather than a single highly specialized spring type.
The required surface condition depends on how the finished spring will be used and what level of corrosion protection is needed.
Luguan can provide different surface finishes according to the purchasing requirement, including:
|
Surface Finish |
Typical Consideration |
|
Bright Surface |
Suitable when a clean metallic surface is preferred and additional corrosion protection is not the primary requirement |
|
Phosphated Surface |
Provides a treated surface suitable for applications where phosphating is part of the subsequent manufacturing or protection process |
|
Galvanized Surface |
Provides additional corrosion resistance for applications exposed to more demanding environmental conditions |
The appropriate finish should be selected together with the intended application, subsequent processing and required service conditions.
Unlike ultra-high-strength spring wire intended for particularly demanding components, 70# carbon spring steel wire is widely suited to small and medium elastic parts operating under medium loads or normal alternating conditions.
|
Application Area |
Typical Components |
Why 70# Wire Is Considered |
|
Spring Manufacturing |
Small and medium coil springs |
Balanced elasticity, strength and forming performance |
|
Hardware |
Spring washers, hardware shrapnels |
Suitable for formed elastic hardware parts |
|
Furniture & Bedding |
Serpentine sofa springs, mattress springs |
Useful for repeatedly loaded elastic structures |
|
Light Machinery |
Elastic fittings and return components |
Combination of strength and workable forming characteristics |
|
Agricultural Equipment |
Agricultural fittings and elastic parts |
Suitable for general-purpose mechanical components |
|
Screening |
Light screen mesh |
Can be processed into wire products requiring moderate mechanical performance |
|
Daily Hardware |
Small spring and elastic components |
Good formability for different component shapes |
The main advantage of 70 carbon spring steel wire is not simply its carbon content. Its value comes from the combination of strength, elasticity, formability and stable processing characteristics.
For manufacturers producing different spring shapes, this balance can be useful when the material needs to withstand normal repeated loading while still allowing efficient forming into coil springs, washers and other elastic components.
The final grade and surface finish should, of course, be matched to the spring design, wire diameter, working load and service environment.
Different spring designs can require different wire diameters, surface conditions and mechanical properties. Instead of selecting a grade solely by its name, buyers should consider the actual forming process and working conditions of the finished component.
Luguan provides pre-sales and after-sales support for customers discussing 70 carbon spring steel wire requirements, including material specifications, surface treatment and purchasing arrangements.
Contact Luguan to discuss your required specification and request a quotation for your spring wire application.
The carbon content is typically 0.67%–0.75%, with silicon at approximately 0.17%–0.37% and manganese at approximately 0.50%–0.80%, according to the specification provided for this product.
It can be suitable for bending and forming relatively complex spring shapes because of its favorable formability and stable springback characteristics. The actual suitability depends on the wire diameter, forming process and spring design.
Bright, phosphated and galvanized surface finishes can be provided according to the required application and corrosion-resistance requirements.
Luguan's product range includes spring 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
Tel
