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We are GB 65Mn steel stockholders and China suppliers. Mittel Steel supplies GB 65Mn Spring Steel in round bar, flat bar, rod bar, wire, and plate formats. GB 65Mn Steel is a high-quality alloy spring steel belonging to the high-quality high carbon alloy spring steel category. Its quenched & tempered hardness is 28-34 HRC, and under annealing delivery, hardness is less than 250HB.
Related Specifications
ASTM A29/A29M, DIN EN 17221, JIS G4801, GB/T 1222 GB 65MN Spring Steel
Form of Supply
GB 65Mn Spring Steel China Supplier and Stockist. Otai Special Steel can supply round bar, steel flat bar, plate, hexagonal steel bar, and steel square block. AISI 65Mn steel round bar can be saw-cut to your required lengths as one-offs or multiple cut pieces. 65Mn steel rectangular pieces can be saw-cut from flat bar or plate to your specific sizes. Ground spring steel bar can be supplied, providing quality precision finished bar to tight tolerances.
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
Equivalent of 65Mn Alloy Spring Steel
USA
Germany
China
Japan
France
England
Italy
Poland
ISO
Austria
Sweden
Spain
AISI/SAE/ASTM/UNS 1066
65Mn
080A67
Heat Treatment
Annealing of 65Mn Spring Steel: Slowly heated to 730°C and allowed sufficient time for thorough heating, then cooled slowly in the furnace. Resulting hardness: MAX 250 HB.
Hardening of 65Mn Spring Steel: Heated uniformly to 830-860°C (1526-1580°F) until completely heated through. Provide about 30 min per 25 mm of ruling section, then immediately quench in oil.
Tempering of 65Mn Spring Steel: Performed at 540°C. Soak well at selected temperature for at least one hour per 25mm of total thickness.
Mechanical Properties
Tensile Strength
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
Applications
65Mn steel, after heat treatment and cold drawing hardening, exhibits high strength with certain toughness and plasticity. In surface hardening cases, it achieves complete fatigue limits comparable to alloy spring steel. However, hardenability is poor, making it mainly suitable for smaller size springs such as regulating speed springs, load springs, round and square spiral springs in general machinery, or pull wire for small mechanical springs.
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
Other 65Mn sizes not specified - please contact our experienced sales team.
Processing
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, providing high-quality spring steel precision ground bar to your required tolerances. GB 65Mn steel is also available as Ground Flat Stock / Gauge Plate in standard and non-standard sizes.
Contact our experienced sales team to help with your 65Mn Spring Steel questions and inquiries by Email or Telephone. All questions will be replied to within 24 hours.
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...
