61SiCr7(1.7108) high quality spring steel

Material:403,201,202,304,304HC,304L,310S,316,316L,317L Surface:bright,polished,black Certificate:ISO,SGS Origin:China

Material Name: 61SiCr7(1.7108) spring steel

executive standard:EN 10089-2002

1Characteristics and application scope:

Is widely used silicon manganese spring steel, strength, elasticity and its quench-hardening ability is 55 Si2Mn higher. Suitable for railway vehicle and auto tractor industry production under high load of flat look line diameter in spring or 30 mm of the spiral spring, also suitable for making work in 250 °C temperature below the corrosive medium heat and the spring under the load and high stress in alternating worked under large important coiling spring.

2chemical composition:

C :0.57~0.65

Si:1.60~2.00

Mn:0.70~1.00

S :≤0.025

P :≤0.025

Cr:≤0.45

Ni:≤0.35

Cu:≤0.25

3 mechanical property:

tensile strengthσb (MPa):≥1274(130)

yield strength σs (MPa):≥1176(120)

elongation     δ10 (%):≥5

relative reduction in area ψ (%):≥25

hardness:Hot-rolled, ≤321 HB; Cold pull + heat treatment, ≤321 HB

4Heat treatment standard and metallographic organization:

heat treatment regime: Quenching 870°C±20°C, oil cooling; Tempering 480°C±50°C (special needs, ±30°C)

metallographic organization: tempered troostite.

5condition of delivery:Hot-rolled steel heat treatment or not heat treatment with state delivery, cold pull steel heat treatment with state delivery.

61SiCr7(1.7108) high quality spring steel