Henan Friend Metal Products Co., Ltd. is one of the leading manufacturers and suppliers of 65mn spring steel wire in China. If you're going to buy 65mn spring steel wire made in China, welcome to get more information from our factory. We also accept customized orders.
Standard: GB/T 1222-1984
Characteristics and application:
65 mn spring steel wire, manganese improve hardenability, phi 12 mm steel oil can be hardening, surface decarburization tend to be smaller than silicon steel, after heat treatment of the comprehensive mechanical performance is better than that of carbon steel, but there are overheating sensitivity and temper brittleness.
It is used as small size various flat, round spring, cushion spring, spring spring, also can make spring ring, valve spring, clutch spring, brake spring and cold drawn wire coil spring.
The strength of 65mn, hardness, elasticity and hardenability are higher than that of no. 65, with the tendency of superheat sensitivity and tempering brittleness, and water quenching has a tendency to crack.The annealing state can be machinable, cold deformation plastic and poor welding.
The medium - loaded plate spring with a diameter of 7-20mm coil spring and spring washer.
High wear-resistant parts, such as grinder spindle, spring card head. Precision machine tool wire rod. Cutter. Coils of spiral roller bearings. Railway rails, etc.
Chemical composition:
C ：0.62～0.70
Si：0.17～0.37
Mn：0.90～1.20
S ：≤0.035
P ：≤0.035
Cr：≤0.25
Ni：≤0.30
Cu：≤0.25
Mechanical properties:
Tensile strength sigma b (MPa) :≥980(100)
Yield strength sigma s (MPa) :≥784(80)
Elongation delta 10 (%) :≥8
The cross section shrinkage is psi (%) :≥30
Hardness: hot rolling,≤302HB
Cold pull + heat treatment,≤321HB
Heat treatment specification and metallographic structure:
Heat treatment specification: 830 ℃ quenching + 20 ℃, oil cooling;
Tempering 540 ℃ + 50 ℃ (special needs, plus or minus 30 ℃).
The metallographic structure: the trophite.
Delivery status:
hot rolled steel is delivered in heat treatment or without heat treatment, and cold drawn steel is delivered in heat treatment.
Specification:
Disc round: Φ 5.5 ~ 16 mm
Rolling: Φ 120 ~ 150 mm
Forging materials: Φ 160 ~ 450 mm
The density of 65 mn
The density of 65Mn is 7.81g/m3, which can be cold-rolled steel, steel strip and wire, and make spring.
65Mn can also be made into tools such as chisels and needles.
65Mn spring steel can make a small spring of about 1.4 ~ 12mm in the general section size, such as various small size, round spring, bottom cushion spring.
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