• Wuxi Jinlai Mechanical Processing Co., Ltd.
    John Fairbank
    stainless steel strip with good quality and the Sales clerk service is very good.i like this company i hope can work with your again
  • Wuxi Jinlai Mechanical Processing Co., Ltd.
    Shipment speed is very fast, and the requirements can meet me. Salesman is very responsible.
  • Wuxi Jinlai Mechanical Processing Co., Ltd.
    Fierce Urchin
    good ,the galvanized steel coil quality is good and i donot see the broken on them.that is nice
Contact Person : Jo Yuan
Phone Number : +86-18706170710
WhatsApp : +8618706170710

Construction Thin Spring Steel Strips , Flat Spring Steel 65mn 1066 Tool Hardware

Place of Origin: CHINA
Brand Name: JIN LAI
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
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
High Light:

spring steel sheet


spring steel rod

Leave a Message
Product Description

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.