Grade 45A Shaft, Forgings, 45A
2026-10-31 09:51:11 Origin： Remark：0 Click：
JB/T 7025 Specification for rotor and shaft forgings for 25 MW steam turbines and below, Grade 45A heat treated round bar, plate, peeled rod structural steel 45A stock available
TECHNICAL DATA SHEET - Grade 45A
Steel type: 0.65Mn - 0.45C iron base structural steel
Technical specification: JB/T 1265 - 2002
Stock in hand: round bar, plate, sheet
Profiles and dimensions:
Round bar, rod, disc (diameter): 6.0 ~ 900 mm
Square bar, flat bar: 8 ~ 600 mm
Plate, sheet, strip: T 0.5 ~ 300 x W 20 ~ 1000 x L mm
TYPICAL CHEMICAL ELEMENTS (mass fraction - %)
Carbon, C (％): 0.42 ~ 0.50
Manganese, Mn (％): 0.50 ~ 0.80
Silicon, Si (％): 0.17 ~ 0.37
Phosphorus, P (％): ≤ 0.020Sulfur, S (％): ≤ 0.012
Chromium, Cr (％): ≤ 0.30
Molybdenum, Mo (％): -
Nickel, Ni (％): ≤ 0.30
Vanadium, V (%): -
Copper, Cu (%): ≤ 0.20
Tungsten, W (%): -
Aluminum, Al (%): -
Ferrum, Fe (%): remainder.
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT PRACTICE
Heat treatment temperature, annealing:
Heat treatment temperature, normalizing: -
Heat treatment temperature, quenching: 850 degrees celsius
Heat treatment temperature, tempering : 600 degrees celsius
Hardness after annealing, ≤ HB: 207
Tensile strength, Rm: 520 MPa Min.
Yield strength, Rp0.2: 280 MPa Min.
Elongation, A5: 19.0% Min.
Reduction of area, Z: 40.0% Min.
Impact strength, AKU2: 31 J Min.
Heat treatment temperature, annealing:
Heat treatment temperature, normalizing: -
Heat treatment temperature, quenching: 850 degrees celsius
Heat treatment temperature, tempering : 600 degrees celsius
Hardness after annealing, ≤ HB: 207
Tensile strength, Rm: 520 MPa Min.
Yield strength, Rp0.2: 280 MPa Min.
Elongation, A5: 19.0% Min.
Reduction of area, Z: 40.0% Min.
Impact strength, AKU2: 31 J Min.
Hardness after final heat treatment, HB: -
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.
Mechanical parts - connecting rod, bolt and nuts.
Multi-diameter shaft, pressure vessel parts.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners, mechanical gears, gear shaft, main axis, valve rod.
TECHNICAL SALES ASSISTANCE & SERVICE
20+ years focus on special steel manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
We closely cooperate with the professional inspection partners to strictly control the quality and improve the quality manage system, and guarantee the goods delivery each time. It is proved that we are worth of trusting and will be the strategic partner of the supplying chains in the special steels field.
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.
Mechanical parts - connecting rod, bolt and nuts.
Multi-diameter shaft, pressure vessel parts.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners, mechanical gears, gear shaft, main axis, valve rod.
TECHNICAL SALES ASSISTANCE & SERVICE
20+ years focus on special steel manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
We closely cooperate with the professional inspection partners to strictly control the quality and improve the quality manage system, and guarantee the goods delivery each time. It is proved that we are worth of trusting and will be the strategic partner of the supplying chains in the special steels field.
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