spcc-sd,dc01 cold rolled steel strip 65Mn tempered spring steel strip blue color hardness 48HRC

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SPCC-SD Cold Rolled Steel Strip DC01 Cold Rolled Steel Strip                                                                                                       


Spcc cold rolled steel strip is a general & steel, its chemical composition&mechanical properties equivalent to GB q195 steel& q215a steel.


Spcc steel chemical%:












Spcc steel Mechanical Properties


Yield Strength  mpa

tensile strength mpa

Elongation %






Jis g3141 Spcc steel sheet/strip application:


Jis g3141 spcc steel sheet/steel strip, is a kind of cold rolled carbon steel sheet/steel strip.its main characteristics are low or very low carbon %,it contain fine grain and Ti,Nb alloy elements.it has a wide application in auto body,gear,transmission shaft,pinion steel,crankshaft.cold forging steel for standardized parts & components etc.



White&Bule Color Spring Steel Strip 65Mn Cold Rolled Steel Sheet HRC40                                                             


  • Bright Steel Strip

  • Black Annealed Steel Strip

  • Cold Hardened Steel Strip

  1. Quality/Industry: Temper Rolled (Full Hard, Half Hard, Quarter Hard), Drawing, Deep Drawing, Extra deep drawing, Mediums High Carbon Or equivalent materials.

  2. Available Specification: BS/DIN/ASTM/JIS and equivalent

  3. Thickness: 0.3mm-2.5mm Thickness Tolerance: +/-0.015mm

  4. Width: 10mm - 900mm

  5. I. D.: 200mm/500mm (slit edge: 508mm)

  6. Coil Weight: 0.1~3.5MT

  7.  Packing: Mill's standard exports packing,
    Mill edge: 4 steel strapping and 2 wire rod through coil eye, 1 steel strapping on the coil circumference; 3-4 strips to be bundled into a bigger coil, each package is max. 3MT
    Slit edge: 6 steel strapping through coil eye, 1 steel strapping on the coil circumference; 3-4 strips to be bundled into a bigger coil, and strongly strapped by edge protection; Each package is max. 3MT

White color spring steel strip 65Mn                                                                                                                                                     


65Mn steel is a Chinese GB standard spring steel grade, Manganese (Mn) improves hardenability, so the strength, hardness, elasticity and hardenability are higher than that of 65# steel, but it has overheat sensitivity and temper brittleness. Water quenching tends to form cracks. The annealed state has good machinability, low cold deformation plasticity, and poor weldability.

65Mn high carbon steel is mainly used in the manufacture of various small-section flat springs, round springs, clockwork, etc. It can also be used to manufacture spring rings, valve springs, shock absorbers, clutch reeds and brake springs.


The table below lists 65Mn high carbon steel chemical composition based on heat analysis                                                    


Chemical Composition, %
StandardGradeCSiMnP, ≤S, ≤Cr, ≤Ni, ≤Cu, ≤
GB/T 122265Mn0.62-0.700.17-0.370.90-1.200.0300.0300.250.350.25


  Mechanical Properties
StandardGradeTensile Strength, MPa, ≥Yield Strength, MPa, ≥Elongation, %, ≥Reduction in Area, %, ≥Brinell Hardness, HBW, ≤
GB/T 122265Mn9807858.030302

Notes: Bars with a diameter and side length of not more than 80 mm and flat steels with a thickness of not more than 40 mm.


Tensile strengthConditions to yield strengthElongationReduction of area


(Hot Rolled)

Hardness (Cold Drawn)
σb (MPa):≥980σ0.2 (MPa):≥785δ 5 (%):≥8ψ (%):≥30≤302HB; HRC40


Heat Treatment Specification                                                                                                                                                               

  Heat Treatment
StandardGradeQuenching temperature, °CQuenching mediumTempering temperature, °C
GB/T 122265Mn830 ± 20Oil540 ± 20

Annealing process: Annealing temperature (860 ± 10) °C, heat preservation for 45-60min, furnace cooling to (750 ± 10) °C, heat preservation for 3-3.5h, and furnace cooling to 650-660 °C, then cooling out of the furnace or slow cooling in a heat preservation pit.

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.

Blue Color Spring steel strip 65Mn          Hardness > HRC40                                                                                                             5


Spcc-sd,dc01 cold rolled steel strip 50# 65Mn cold rolled pring steel strip coil package                                                           



Each small coil will package by moisture proof paper or moisture proof bag, then package in wooden pallet.                      



Amy Zhang







0.01 s.