Cr-Ni alloy steel 12XH3A
2026-08-23 09:25:00 Origin： Remark：0 Click：
Material standard specification of TOCT 4543 type 12XH3A Round bar, flat bar, and forgings ESRmelted, Blooming, Hot forging, Hot rolling, Heat treatment
TECHNICAL DATA SHEET - 12XH3A
ECHNICAL SPECIFICATION: TOCT 4543 - 1971
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - CNAS
MATERIAL CATEGORY: alloy structural steel Cr - Ni type
TYPICAL CHEMICAL COMPOSITIONS (mass fraction - %)
Carbon, C (％): 0.09 ~ 0.16
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.30 ~ 0.60
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.025
Chromium, Cr (％): 0.60 ~ 0.90
Nickel, Ni (％): 2.75 ~ 3.15
Molybdenum, Mo (％): -
Copper, Cu (%): ≤ 0.30
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Hot working temperarture: 1200 ~ 850 Deg.
Hot working temperarture: 1200 ~ 850 Deg.
Heat treatment: Quenching 860 Deg. water or oil cooling
Tempering 180 air or oil cooling
Tensile strength, σb ≥ MPa: 932
Yield strength, σ0.2 ≥ MPa: 686
Elongation, δ5 ≥: 11.0%
Reduction of area, ф ≥: 55.0%
Tensile strength, σb ≥ MPa: 932
Yield strength, σ0.2 ≥ MPa: 686
Elongation, δ5 ≥: 11.0%
Reduction of area, ф ≥: 55.0%
Impact, AK (J/cm2): 88
Annealed hardness, HB: 217
Annealed hardness, HB: 217
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.
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.
PROFILES AND DIMENSIONS
Round bar, rod, disc (diameter): 6.0 to 800mm
Square bar, flat bar: 10mm to 500mm
Steel strip: T0.20 ~ 3mm X W10 ~ 1000mm X 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, Email: sales@ccsteels.com.
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers, Email: sales@ccsteels.com.
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