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75KhMF steel

R6M5K5 Р18 R9M4K8 Р9 45CRNIM 60XH 75CSMF 9Х2 55Х 60CSMF 7X2CMF 9X2MF 60CR2SMF 75CRM 90XMF 60XG 75CRMOV 90XF CB4F 9XVG. CVG 9HS 9Х1 У10 У12 У7 U10A U12A U7A У8 U8A U9A У9 27Х2Н2М1Ф 4X5MFS 6XV2C 7XG2VMF Х12 X12MF 40X5MF 4XV2C 5CHEV2C 6CVG X12VM X12F1 3CR2V8F 4CMFS 5CGM 6HS 8Х3 X6VF. 3Х2Н2МВФ 4Х2НМФ 4X5MF1S 5CRNIM 7Х3

75CrMoV Steel

Steel 75KhMF: a classifier of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperatures, physical, mechanical, technological and foundry properties for the brand — Steel 75KhMF.

General information on steel 75CrMF

Substitute for the brand
Steel grade: 75KhM, 9KhF.
Delivery type
Rolls OST 24.013.04−83, OST 24.013.20−85, OST 24.013.21−85.
Application
Working and supporting forged rolls of sheet rolling mills for hot rolling of ferrous metals.

Chemical composition of steel 75KhMF

Chemical element %
Vanadium (V) 0.05−0.25
Silicon (Si) 0.20−0.60
Manganese (Mn) 0.20−0.70
Molybdenum (Mo) 0.10−0.30
Nickel (Ni), max. 0.30
Sulfur (S), not more than 0.040
Carbon (C) 0.70−0.80
Phosphorus (P), not more than 0.040
Chromium (Cr) 1.40−1.70

Mechanical properties of steel 75CrMoV

Mechanical properties

Heat treatment, delivery condition Section, mm HB HRCe
Barrels of bearing rolls of hot rolling mills. Normalization. Tempering. <1600   HSD 35−60
Barrels of support rolls of hot rolling mills. Hardening. Tempering. <1600   HSD 45−75
Support roll necks of hot strip mills. Normalization. Tempering.     HSD 30−60
Heat treated mandrels with higher hardness requirements, type 4 <1600   HSD 70−85
Keeper roll tires after heat treatment, type 4 <1600   HSD 45−69
Rolls barrels of rail and section mills. Normalization. Tempering. 950 241−285  
Rolls barrels of rail and section mills. Hardening. Tempering. 500 352−429  

Technological properties of steel 75KhMF

Forging temperature
The beginning 1200, the end 800.
Weldability
hardly weldable.
Floc-sensitivity
low sensitivity

Steel 75CrMoV critical point temperature

Critical point °С
Ac1 760−790

Hardness of steel 75KhMF

Delivery condition, heat treatment regime HB HSD
Barrels of bearing rolls of sheet rolling mills for hot rolling. Section up to 1600 mm. Normalization. Tempering.   35−60
Barrels of support rolls of sheet mills for hot rolling. Section up to 1600 mm. Hardening. Tempering.   45−75
Neck support rolls of sheet hot rolling mills. Normalization. Tempering.   30−60
Support rolls bandages after heat treatment with increased hardness requirements, type 4. Cross-section up to 1600 mm.   70−85
Shrouds of support rolls after heat treatment with increased hardness requirements, type 5. Cross-section up to 1600 mm.   45−69
Rolls barrels of rail and section mills. Cross-section up to 950 mm. Normalization. Tempering. 241−285  
Rolls barrels of rail and section mills. Section up to 500 mm. Hardening. Tempering. 352−429  

Hardenability of steel 75KhMF

Distance from the end face, mm / HRCe
25−30 60
62−64 41,5
Critical hardness, HRCe Distance from end to end to be cooled
62−64 25−30
41,5 60