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Rotor forging steel 28CrMoNiV
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JB/T 7022 Specification for rotor forgings for industrial steam turbines 28CrMoNiV heat treated round bar, plate, peeled rod, flat bar 28CrMoNiV heat treatment

TECHNICAL DATA SHEET - GB 28CrMoNiV

Material category: specification for rotor forgings for industrial steam turbines
Steel type: 1.25Cr - 0.9Mo - 0.62Mo - 0.3V - 0.28C base alloy steel
Technical specification: JB/T 7022
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 ~ 1200 x L mm

TYPICAL CHEMICAL COMPOSITIONS (mass weight - %)
Carbon, C (％): 0.25 ~ 0.30

Manganese, Mn (％): 0.30 ~ 0.80

Silicon, Si (％): ≤ 0.30

Phosphorus, P (％): ≤ 0.015
Sulfur, S (％): ≤ 0.010
Chromium, Cr (％): 1.10 ~ 1.40
Molybdenum, Mo (％): 0.80 ~ 1.00
Nickel, Ni (％): 0.50 ~ 0.75
Vanadium, V (%): 0.25 ~ 0.35

Copper, Cu (%): ≤ 0.20

Aluminum, Al (%): ≤ 0.010

Ferrum, Fe (%): balance.

MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT PRACTICE
Heat treatment temperature, annealing:
Heat treatment temperature, normalizing: -
Heat treatment temperature, quenching: 880 degrees celsius
Heat treatment temperature, tempering : 550 degrees celsius
Hardness after annealing, ≤ HB: 269
Tensile strength, Rm: 700 ~ 850 MPa
Yield strength, Rp0.2: 550 ~ 700 MPa
Elongation, A5: 15.0% Min.
Reduction of area, Z: 40.0% Min.
Impact strength, AKv: 24 J Min.

Hardness after final heat treatment, HB: -

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.

If you are interested in our products or services, pleased to EMAIL (sales@ccsteels.com) our qualified production engineers or sales department.

Further, please also check the materials in stock available:

Raw material - steels of blade for steam turbine

XM-25, S45000, GD450, C450

403 ESR, GB8732 type 12Cr12Mo, 10705BA/BB/BC

AISI 616, 422, 1.4935, X20CrMoWV12-1, 10705BU

B50A365B, 403Cb+, 1.4913, X19CrMoVNbN11-1

17-4PH, 630, 1.4542, X5CrNiCuNb16-4, 10705GU/GV/GW

M-152, S64152, 1.4938, X12CrNiMoV12-3, S151D

FV520B, S143, 1.4594, X4CrNiCuMo14-5

X22CrMoV12-1, 1.4923

13Х11Н2B2MФ, AE961W

15-5PH, XM-12, S15500

A286, AISI 660, S66286

10705MBU, 10705AJ

Non-magnetic 18.0% Manganese alloy steel:

1.3813, X40MnCrN19

1.3816, X8MnCrN18-18

1.3817, X40MnCr18

1.3818, X55MnCrN18-4

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