34CrMo1A Rotor, Shaft forgings Steel
2026-11-08 08:48:23 Origin： Remark：0 Click：
JB/T 7025 Specification for rotor and shaft forgings for 25 MW steam turbines and below, heat treated round bar, plate, peeled rod, stock available flat bar
TECHNICAL DATA SHEET
34CrMo1A is a low alloy content elements 0.95Cr - 0.47Mo - 0.34C iron base alloy structural steel
Technical specification: JB/T 7025 - 2018
Material category: JB/T 7025 Specification for rotor and shaft forgings for 25 MW steam turbines
Stock in hand: plate, flat barProfiles and dimensions:
Round bar, rod, disc (diameter): 6.0 ~ 910 mm
Square bar, flat bar: 8 ~ 650 mm
Plate, sheet, strip: T 0.5 ~ 300 x W 20 ~ 1000 x L mm
TYPICAL CHEMICAL ELEMENTS (mass fraction - %)
Carbon, C (％): 0.30 ~ 0.38
Manganese, Mn (％): 0.40 ~ 0.70
Silicon, Si (％): 0.17 ~ 0.37
Phosphorus, P (％): ≤ 0.020Sulfur, S (％): ≤ 0.012
Chromium, Cr (％): 0.70 ` 1.20
Molybdenum, Mo (％): 0.40 ~ 0.55
Nickel, Ni (％): ≤ 0.40
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: 580 MPa Min.
Yield strength, Rp0.2: 350 MPa Min.
Elongation, A5: 17.0% Min.
Reduction of area, Z: 32.0% Min.
Impact strength, AKU2: 39 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: 580 MPa Min.
Yield strength, Rp0.2: 350 MPa Min.
Elongation, A5: 17.0% Min.
Reduction of area, Z: 32.0% Min.
Impact strength, AKU2: 39 J Min.
Hardness after final heat treatment, HB: -
PRODUCT DESCRIPTION
34CrMo1A is usually produced by EAF + VD + LF / EF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied black in the annealed condition.
Heat treatment condition- normalized + tempered, quenched + tempered.
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.
PRODUCT DESCRIPTION
34CrMo1A is usually produced by EAF + VD + LF / EF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied black in the annealed condition.
Heat treatment condition- normalized + tempered, quenched + tempered.
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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