25X2H4BA
2025-09-29 05:59:00 Origin： Remark：0 Click：
Specification TOCT 4543 type 25X2H4BA round bar, plate, peeled rod, cold drawn flat bar properties from Steelmaking,ESR melted, hot bloomed, rolled, forged
TECHNICAL DATA SHEET - 25X2H4BA
Technical specifications: TOCT 4543 - 1971
Stock available: round bar dia. 20 ~ 210mm
Material category: alloy structural steel Cr - Ni - Mo type
Typical chemical compositions (mass fraction %)
Carbon, C (％): 0.21 ~ 0.28
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.25 ~ 0.55
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.025
Chromium, Cr (％): 1.35 ~ 1.65
Stock available: round bar dia. 20 ~ 210mm
Material category: alloy structural steel Cr - Ni - Mo type
Typical chemical compositions (mass fraction %)
Carbon, C (％): 0.21 ~ 0.28
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.25 ~ 0.55
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.025
Chromium, Cr (％): 1.35 ~ 1.65
Nickel, Ni (％): 4.00 ~ 4.50
Molybdenum, Mo (％): -
Molybdenum, Mo (％): -
Tungsten, W (%): 0.80 ~ 1.20
Copper, Cu (%): ≤ 0.30
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Hot working temperarture: 1150 ~ 850 Deg.
Hot working temperarture: 1150 ~ 850 Deg.
Heat treatment: Quenching 850 Deg. oil cooling
Tempering 550 oil or water cooling
Tensile strength, σb ≥ MPa: 1080
Yield strength, σ0.2 ≥ MPa: 930
Elongation, δ5 ≥ (％): 11.0
Reduction of area, ф ≥ (％): 45.0
Tensile strength, σb ≥ MPa: 1080
Yield strength, σ0.2 ≥ MPa: 930
Elongation, δ5 ≥ (％): 11.0
Reduction of area, ф ≥ (％): 45.0
Impact strength, AK (J/cm2): 71
Annealed hardness | HBW: 269 min.
Annealed hardness | HBW: 269 min.
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.
PROFILE AND DIMENSIONS
Round bar / rod / disc (diameter): 6.0 to 800mm
Square bar / flat bar: 8m to 600mm
Steel strip: T0.40 ~ 3 X W10 ~ 2000mm X Coil
Forging piece: stepped shafts, and 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.
PROFILE AND DIMENSIONS
Round bar / rod / disc (diameter): 6.0 to 800mm
Square bar / flat bar: 8m to 600mm
Steel strip: T0.40 ~ 3 X W10 ~ 2000mm X Coil
Forging piece: stepped shafts, and 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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