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Features and Scope:
25Mn strength than steel and 20Mn steel 25 are high performance and 25 other steel and 20Mn steel is similar to carburizing and welding parts such as camshafts, gears, couplings, hinges, pins, tow bar and so on.
25mn, compared with 25 steel has high strength and hardenability, cold deformation of the plastic is good, welding medium machinability is good. Tendency to temper embrittlement when heat treatment and thermal sensitivity. For bolts. Nuts. Screws. Rod. A small shaft. Brake gear.
Chemical composition : Carbon C: 0.22 ~ 0.29, Si Si: 0.17 ~ 0.37, Manganese Mn: 0.70 ~ 1.00, S S: ≤ 0.035 ,P P: ≤ 0.035
Mechanical Properties
25Mn performance:
Tensile strength σb (MPa): ≥ 490 (50)
Yield strength σs (MPa): ≥ 295 (30)
Elongation δ5 (%): ≥ 22
Reduction of area ψ (%): ≥ 50
Impact energy Akv (J): ≥ 71
Impact toughness αkv (J/cm2): ≥ 88 (9)
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