38X2H2MA
2025-07-29 11:11:00 Origin： Remark：0 Click：
TOCT 4543 type 38X2H2MA round bar stock available, flat bar, plate properties from Steelmaking, ESR melted 38X2H2MA hot forging/rolling, heat treatment
TECHNICAL SPECIFICATION - 38X2H2MA
TECHNICAL SPECIFICATION: TOCT 4543 - 1971
STOCK AVAILABLE: round bar Diam. 20 ~ 300mm
MATERIAL CATEGORY: alloy structural steel Cr - Ni - Mo type
CHEMICAL COMPOSITIONS (mass weight %)
Carbon, C (％): 0.33 ~ 0.40
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.25 ~ 0.50
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.025
Chromium, Cr (％): 1.30 ~ 1.70
Nickel, Ni (％): 1.30 ~ 1.70
Molybdenum, Mo (％): 0.20 ~ 0.30
Molybdenum, Mo (％): 0.20 ~ 0.30
Copper, Cu (%): ≤ 0.30
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Hot working temperarture: 1150 ~ 850 Deg.
Hot working temperarture: 1150 ~ 850 Deg.
Heat treatment: Quenching 870 Deg. oil cooling
Tempering 530 air or oil cooling
Tensile strength, σb ≥ MPa: 1079
Yield strength, σ0.2 ≥ MPa: 932
Elongation, δ5 ≥ (％): 12.0
Reduction of area, ф ≥ (％): 50.0
Tensile strength, σb ≥ MPa: 1079
Yield strength, σ0.2 ≥ MPa: 932
Elongation, δ5 ≥ (％): 12.0
Reduction of area, ф ≥ (％): 50.0
Impact strength, AKv (J/cm2): 78
Annealed hardness | HBW: 269
Annealed hardness | HBW: 269
TYPICAL APPLICATIONS
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners.
Mechanical gears, gear shaft, main axis, valve rods.
Mechanical parts - connecting rods, bolts and nuts.
Multidiameter shafts.
OFFERING FORMS AND DIMENSIONS
Rod / round bar / disc (diameter): 5.5 to 500mm
Square bar / flat bar: 8 to 600mm
Steel strip: T0.20 ~ 3 X W10 ~ 200 X L mm in Coil
Forging piece: stepped shafts, other different shapes based on OEM.
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners.
Mechanical gears, gear shaft, main axis, valve rods.
Mechanical parts - connecting rods, bolts and nuts.
Multidiameter shafts.
OFFERING FORMS AND DIMENSIONS
Rod / round bar / disc (diameter): 5.5 to 500mm
Square bar / flat bar: 8 to 600mm
Steel strip: T0.20 ~ 3 X W10 ~ 200 X L mm in Coil
Forging piece: stepped shafts, other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers.
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers.
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