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65MN Spring Steel Strip - Cold Rolled Heat Treated Steel
65MN spring steel strips are cold rolled and heat treated to achieve HRC 40 hardness, offering excellent mechanical properties for demanding industrial applications.
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
0.25max
Ni
0.25max
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 with sufficient soaking time to ensure thorough heating, then cool slowly in the furnace. Resulting hardness: MAX 250 HB.
Hardening Process
Heat uniformly to 830-860°C (1526-1580°F) until completely heated through. Allow approximately 30 minutes per 25mm of ruling section, then immediately quench in oil.
Tempering Process
Temper at 540°C with thorough soaking for at least one hour per 25mm of total thickness. Hardness values vary based on tempering temperatures.
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 offers high strength with adequate toughness and plasticity after heat treatment and cold drawing hardening. While hardenability is limited, it excels in smaller spring applications including speed regulating springs, load springs, round and square spiral springs for general machinery, and pull wires for small mechanical springs.
Custom sizes available - contact our experienced sales team
Processing Capabilities
GB 65Mn Spring Steel round bars and flat sections can be cut to your required specifications. We also supply precision ground Spring Steel bars to your exact tolerances, along with Ground Flat Stock and Gauge Plate in both standard and custom sizes.
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...
