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60KhN 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

Steel 60KhN

Steel 60KhN: Handbook of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperature, physical, mechanical, technological and foundry properties for the grade — Steel 60KhN.

General information about 60KhN steel

Delivery type
Rolls OST 24.013.04−83, OST 24.013.21−85.
Application
Working rolls of blooming, slabbing, billet, rail and heavy section mills, working support rolls of sheet metal hot rolling mills.

Chemical composition of steel 60KhN

Chemical element %
Silicon (Si) 0.17−0.37
Manganese (Mn) 0.50−0.80
Nickel (Ni) 1.00−1.50
Sulfur (S), max. 0.04
Carbon (C) 0.55−0.65
Phosphorus (P), not more than 0.04
Chrome (Cr) 0.60−0.90

Mechanical properties of steel 60XH

Mechanical properties

Heat treatment, delivery condition Section, mm HB
Rolls barrels of hot rolling mills: workers. Normalization. Tempering. <1200 229−285
Barrels of rolls of sheet mills for hot rolling: workers. Hardening. Tempering. <500 255−302
Rolls barrels of sheet rolling mills for hot rolling: supporting. Normalizing. Tempering. <1600 229−285
Barrels of crimping and bar mills rolls for hot rolling. Normalization. Tempering. <1500 229−285
Rolls barrels of cogging and section mills for hot rolling. Hardening. Tempering. <500 255−302

Mechanical properties at elevated temperatures

t test,°C σB, MPa δ5, % ψ, %
Specimen with diameter of 10 mm and length of 50 mm deformed. Deformation rate 5 mm/minute. Strain rate 0.002 1/s.
700 94 40 100
800 77 40 100
900 55   100
1000 38 40 100
1100 27 38 100
1200 23 39 100

Mechanical properties depending on tempering temperature

t tempering temperature, °C σ0, 2, MPa σB, MPa δ5, % ψ, % KCU, J/m2 HB
Tempering at 840−860°C. Tempering temperature 4 h.
460−500 1090−1210 1250−1350 12−14 33−36 28−40 363−388
520−580 940−1090 1250−1350 12−15 36−39 43−73 321−352
600−640 750−920 960−1050 17−22 41−51 70−107 288−311

Mechanical properties depending on the cross section

Heat treatment, delivery condition Section, mm σ0, 2, MPa σB, MPa δ5, % ψ, % KCU, J/m2 HB
Forging. Normalizing at 860 °C. Tempering 600 °C.
The place of cutting out the sample is K 200 680−700 1030−1050 12−16 23−30   269−285
Sample cutout location — ½R 200 690 1050 15 27   269
Sample cutout location — C 200 660−690 1040 13−15 32−36   255−285
Rolls. Normalization 840 °C. Tempering 650 °C.
Sample cutout location K 600 390−560 710−860 16−20 30−52 34−59 207−248
Sample cutout location — ½R 600 390−540 710−950 16−21 28−51 15−59 207−248
Sample cutout location — C 600 450 840 15 23 16 241
A regime combining pre-flaking and final heat treatment: Loading at 600−650°C, cooling with furnace to 300−320°C, holding 2 h/100 mm, heating with furnace to 950 °C, holding 0.5 h, cooling to 840−860°C, holding 0.5/100 mm. Air cooled to 400 °C, then with furnace to 200−250 °C, holding for 2 h/100 mm. Heating with furnace to 710 °C, holding for 0.5h, then cooling to 590−601°C, holding at the initial stage 1.5h/100mm, atforging stage 6h/100mm, then cooling at a rate of 30 deg/h to 400 °C, then 15 deg/h to 150 °C (Tangential specimens)
Specimen cutout location — K 500 470 890 11 17 15 241
Sample Cutout Location — 1/3R 500 465 810 9 23   241
Sample cutout location — ½R 500 460 920 6 10 15 255
Sample cutout location — C 500 550 920 5 6   255
Sample cutout location — K 800 510 860 14 30 20 241
Sample cutout location — 1/3R 800 470 830 16 19 20 229
Sample cutout location — ½R 800 445 790 8 11 20 217
Sample cutout location — C 800 420 780 10 15 20 207
Sample cutout location — K 1000 450 880 14 36 20 241
Sample cutout location — 1/3R 1000 520 880 12 23 20 255
Sample cutout location — ½R 1000 420 840 10 10 20 241
Sample cutout location — C 1000 400 760 9 12 15 217

Technological properties of steel 60KhN

Forging temperature
The beginning 1200, the end 800. Sections up to 250 mm are cooled in the air, 251−350 mm — in the pit.
Weldability
Not applicable for welded structures.
Machinability
In normalized and tempered condition at HB 197−229 and σB = 690−830 MPa K υ dw.spl. = 0.80, Kυ b.st. = 0.72 .
The tempering capacity
inclined
Flocke sensitivity
sensitive

Temperature of critical points of 60KhN steel

Critical point °С
Ac1 730
Ac3 775
Ar3 570
Ar1 480
Mn 207

Impact toughness of steel 60XH

Impact toughness, KCU, J/cm2

Delivery condition, heat treatment +20 -20 -40 -60
Hardening 870 C, tempering 650 C, oil. 125 112 92  
Hardening. Tempering 580 C, exposure 30 h, cooling in water 83 73 60 56

Steel hardness 60KhN

Delivery condition, heat treatment regime NV
Barrels of working rolls of sheet rolling mills for hot rolling. Section up to 1200 mm. Normalization. Tempering. 229−285
Barrels of working rolls of sheet mills for hot rolling. Section up to 500 mm. Hardening. Tempering. 255−302
Barrels of bearing rolls of sheet mills for hot rolling. Section up to 1600 mm. Normalization. Tempering. 229−285
Barrels of crimping and bar mills rolls for hot rolling. Cross-section up to 1500 mm. Normalization. Tempering. 229−285
Barrels of crimping and bar mills rolls for hot rolling. Section up to 500 mm. Hardening. Tempering. 255−302

Endurance limit of steel 60XH

σ-1, MPa σB, MPa σ0, 2, MPa
392 920 520

Hardenability of steel 60XH

Hardened at 850 °C, water

Face-off distance, mm / HRCe
57
49
Heat treatment Crest hardness, HRCe Spacing from the end to be cooled
Tempering 850 C, water 49 57