• Wuxi ShiLong Steel Co.,Ltd.
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    Cooperate with a trial order. The service is excellent and the price is very good. Product quality is guaranteed and can stand inspection
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Contact Person : Ava
Phone Number : 0086 18706170710
Whatsapp : +8618706170710

3mm Cold Rolled Spring Steel Strip Hardened Spring Steel Strip Flat Polished

Place of Origin CHINA
Brand Name OEM/ODM
Certification ISO
Model Number 65MN
Minimum Order Quantity 3 tons
Price negotiable
Packaging Details standard seaport packing or as custom request
Delivery Time within 15 days
Payment Terms T/T, Western Union, L/C
Supply Ability 3000 tons per month

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Whatsapp:0086 18588475571

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Product Details
Standard AISI, ASTM, BS, DIN, GB, JIS Steel Grade Q195, Q235, SPCC,65Mn, 40CR, S45C,CK75....
Technic Cold Rolled Width 10-1500mm
Thickness 0.8-8mm Port Shanghai
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3mm spring steel strip


3mm cold rolled spring steel strip


Cold Rolled Spring Steel Strips

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Product Description

Cold Rolled Hardened Spring Steel Flat Wide Applications Polished Bright


65MN Chemical composition

C() 0.62-0.70 Si() 0.17-0.37 Mn() 0.90-1.20 P() ≤0.035
S() ≤0.035 Cr(%) 0.25max Ni(%) 0.25max    


Equivalent Of 65Mn alloy Spring Steel

USA Germany China Japan France England Italy Poland ISO Austria Sweden Spain
1066   65Mn     080A67            


Heat treatment Related

  • Annealing of 65Mn Spring Steel

At first Slowly heated to 730 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. Then 65Mn tool steel will get MAX 250 HB (Brinell hardness).

  • Hardening of 65Mn Spring Steel

At the beginning, 65Mn steels should be heated uniformly to 830-860°C (1526-1580°F) until completely heated through. After about 30 min per 25 mm of ruling section is to be provided and then the steels should be immediately quenched in oil. Tempering of 65Mn Spring Steel

Tempering of 65Mn steels is performed at 540°C, Soak well at the selected temperature and soak for at least one hour per 25mm of total thickness. Hardness values at different temperatures after tempering



Mechanical Properties

The mechanical properties of 65Mn Spring Steels are outlined in the following table.

Tensile strength Conditions to yield strength Elongation Reduction of area Hardness (Hot Rolled) Hardness (Cold Drawn)
σb (MPa):≥980 σ0.2 (MPa):≥785 δ 5 (%):≥8 ψ (%):≥30 ≤302HB;  



65Mn steel, after heat treatment and cold drawing hardening, high strength, it has a certain toughness and plasticity; In the same surface hardening case, completely and the fatigue limit and alloy spring. But hardenability poor, mainly for the smaller size of the spring, such as regulating speed regulating spring, spring load, general machinery in the round, square spiral spring or pull wire for small mechanical spring.



Regular size and Tolerance

Steel round bar: Diameter Ø 2mm – 3000mm

Steel plate: Thickness 2mm – 3000mm x Width 100mm – 3500mm

Steel Hexagonal bar: Hex 5mm – 105mm

Others 65Mn have not specified size, pls contact our experienced sales team.




Moreover, GB 65Mn Spring Steel round bar and flat sections can be cut to your required sizes. 65Mn Spring Steel ground bar can also be supplied by us, providing a high quality Spring Steel precision ground Spring Steel bar to your required tolerances. And GB 65Mn steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.