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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:
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
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
