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  • JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
    Raian Ionescu
    Material quality very good. we have cooperate more than 10 Years. They trade lots kinds of steel material. All material quality good. They duty for all material quality. We are planing continue cooperate with them in the future
Contact Person : Gao Ben
Phone Number : 18068357371
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65Mn Alloy Cold Rolled Steel Coil with 0.01-3mm Thickness for Boiler Plate Applications

  • 65Mn Alloy Cold Rolled Steel Coil with 0.01-3mm Thickness for Boiler Plate Applications
Minimum Order Quantity 1 Ton
Price US $780-1,350 / Ton
Product Details
Thickness Range 0.01-3mm Carbon Content 0.62-0.70%
Silicon Content 0.17-0.37% Manganese Content 0.90-1.20%
Phosphorus Content ≤0.035% Sulfur Content ≤0.035%
Chromium Content 0.25% Max Nickel Content 0.25% Max
Annealing Temperature 730°C Hardening Temperature 830-860°C
Tempering Temperature 540°C Tensile Strength ≥980 MPa
Yield Strength ≥785 MPa Elongation ≥8%
Reduction Area ≥30%
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65Mn Alloy Cold Rolled Steel Coil

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0.01-3mm Thickness Spring Steel Coil

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Boiler Plate Application Hardened Steel Strip
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Product Description
SPCC SPHC 65Mn CK45 CK75 Hardened Spring Steel Coil Strip
Cost-effective beveled edge spring steel coil strip with excellent mechanical properties and heat treatment capabilities.
65Mn Chemical Composition
Element Content (%) Element Content (%)
C 0.62-0.70 Si 0.17-0.37
Mn 0.90-1.20 P ≤0.035
S ≤0.035 Cr 0.25 max
Ni 0.25 max
International Equivalents
Country Standard Grade
USA AISI/SAE/ASTM/UNS 1066
China GB 65Mn
England BS 080A67
Heat Treatment Processes
Annealing Process
Slowly heat to 730°C and allow sufficient time for thorough heating, then cool slowly in the furnace. Resulting hardness: MAX 250 HB (Brinell hardness).
Hardening Process
Heat uniformly to 830-860°C (1526-1580°F) until completely heated through. Allow approximately 30 minutes per 25 mm of ruling section, then immediately quench in oil.
Tempering Process
Temper at 540°C, soaking well at the selected temperature for at least one hour per 25mm of total thickness.
Mechanical Properties
Property Value
Tensile Strength (σb) ≥980 MPa
Yield Strength (σ0.2) ≥785 MPa
Elongation (δ5) ≥8%
Reduction of Area (ψ) ≥30%
Hardness (Hot Rolled) ≤302 HB
Applications
65Mn steel, after heat treatment and cold drawing hardening, provides high strength with good toughness and plasticity. While hardenability is limited, it offers excellent fatigue limits comparable to alloy spring steels. Primarily used for smaller size springs including:
  • Speed regulating springs
  • Load springs
  • Round and square spiral springs
  • Pull wire for small mechanical springs
  • General machinery applications
Available Sizes and Tolerances
  • Steel Round Bar: Diameter Ø 2mm - 3000mm
  • Steel Plate: Thickness 2mm - 3000mm × Width 100mm - 3500mm
  • Steel Hexagonal Bar: Hex 5mm - 105mm
For other 65Mn sizes not specified, please contact our experienced sales team.
Processing Capabilities
GB 65Mn Spring Steel round bars and flat sections can be cut to your required sizes. We also supply 65Mn Spring Steel ground bars, providing high-quality precision ground spring steel bars to your required tolerances. Additionally, GB 65Mn steel is available as Ground Flat Stock / Gauge Plate in standard and non-standard sizes.
Product Images
65Mn Alloy Cold Rolled Steel Coil with 0.01-3mm Thickness for Boiler Plate Applications 0 65Mn Alloy Cold Rolled Steel Coil with 0.01-3mm Thickness for Boiler Plate Applications 1 65Mn Alloy Cold Rolled Steel Coil with 0.01-3mm Thickness for Boiler Plate Applications 2 65Mn Alloy Cold Rolled Steel Coil with 0.01-3mm Thickness for Boiler Plate Applications 3
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