Stamping Spring Shrapnel for Varions Use
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- Model NO.: MFT-45E223
- Bumper Position: After The Box Parts
- 60si2mna: Hardness42-47HRC.
- Trademark: Mfengte
- Specification: 25*15*0.5
- HS Code: 84099999
- Type: a Bayonet Spring
- Material: Steel
- Electroplate: Chromium and Zinc
- Transport Package: 500 Pack Per
- Origin: Changzhou Jiangsu
The characteristics and application scope:
Is the wide application of Si Mn spring steel, strength, elasticity and quenching through of slightly higher than 55Si2Mn. Suitable for railway vehicle, automobile and tractor industry making bear a larger load flat spring or line diameter 30mm spiral spring, also suitable for making working temperature of 250 DEG C under non corrosive medium in heat-resistant spring and bear alternating load and large volume of spring force to work in high stress.
The chemical composition:
Carbon C:0.56 ~ 0.64
Silicon Si:1.60 ~ 2
Mn Mn:0.60 ~ 0.90
Sulfur: S = 0.030
P: P = 0.030
Cr: Cr = 0.35
Ni: Ni = 0.35
Copper: Cu = 0.25
- Mechanical properties:
The ultimate tensile strength of B (MPa): 1568 (160)
Yield strength s (MPa): 1372 (140)
10 elongation (%): 5
Section shrinkage (%): 20 PSI
The hardness is less than or equal to 321HB;: hot rolling, cold drawing + heat treatment, less than 321HB
55Si2MnB characteristic: performance and 55Si2Mn steel similar, but quenching through of higher, in the oil critical quenching through diameter of about 90~180mm and fatigue strength are significantly improved. Uses: applicable to small and medium-sized manufacturing section steel plate spring, such as the car of before and after the vice leaf spring.
55SiMnVB characteristic: strength, toughness and plasticity and hardenability were than that of 60Si2MnA steel high and oil in critical quenching through diameter of about 50~107mm; good hot workability and small surface decarburization tendency during the heat treatment, tempering stability. Uses: applicable in the manufacture of medium section size of the plate spring and a spiral spring, instead of 60SiMnA steel is used.
Higher inclusion; oil should 44~88mm; 25~57mm is about high: 55Si2Mn - Characteristics of strength, elastic limit, yield ratio is high, the heat treatment has good toughness, welding of cold plastic deformation of low cutting is good hardenability is 65, 65Mn steel, and the critical hardening diameter: oil in water is about; the steel quenching and water quenching crack formation tendency, no temper brittleness, and has anti tempering stability and anti relaxation and stability of steel rolling is difficult, the surface easy flaw, the decarburization tendency; appropriate in quenching and tempering state. Use: suitable for manufacturing railway vehicles, cars, tractors, etc.