Steel SHKH15

Designation

Name The value
Designation GOST Cyrillic ШХ15
Designation GOST Latin ShX15
Transliteration ShH15
By chemical elements -

Description

Steel SHKH15 is used: for the production of seamless cold — and hot-deformed tubes for the manufacture of rings, ball and roller bearings; balls with a diameter of 150 mm, roller diameter up to 23 mm; bushings plungers, plungers; pressure valves; housings dispensers; roller tappets and other parts that demand high hardness, wear resistance and contact strength; autogenous round wire with a diameter of 1.4−10.0 mm for the manufacture of balls, rollers and bearing rings.

Note

Steel ШХ15Ф-sh electroslag remelting additionally alloyed with vanadium.

Standards

Name Code Standards
Sheets and strips В23 GOST 103-2006
Bars and shapes В22 GOST 2590-2006, GOST 2591-2006
Wire, steel, alloy В73 GOST 4727-83
Steel pipes and fittings to them В62 GOST 800-78, TU 14-3-1203-83, TU 14-3-335-75
Bars and shapes В32 GOST 801-78, GOST 7417-75, GOST 14955-77, GOST 21022-75, TU 14-1-1500-75, TU 14-1-2032-76, TU 14-1-232-72, TU 14-1-2398-78, TU 14-132-173-88, TU 14-1-3815-84, TU 14-1-5358-98, TU 14-11-245-88, TU 1142-250-00187211-96
Blanks. Of the workpiece. Slabs В31 TU 14-1-1213-75, TU 14-1-3680-83, TU 14-1-3911-85, TU 14-1-699-73
Sheets and strips В33 TU 14-1-2425-78, TU 14-19-18-87
Hard alloys, ceramic-metal products and metal powder В56 TU 14-22-139-99
Tape В34 TU 14-4-1112-80
Low carbon steel wire В71 TU 14-4-563-74

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu
GOST 801-78 0.95-1.05 ≤0.02 ≤0.027 0.2-0.4 1.3-1.65 0.17-0.37 ≤0.3 Rest ≤0.25
GOST 21022-75 0.95-1.05 ≤0.01 ≤0.025 0.2-0.4 1.3-1.65 0.17-0.37 ≤0.3 Rest ≤0.25
Fe is the basis.
According to GOST 801-78 and TU 14-1-3911-85 the chemical composition is given for steel grade SHKh15. The total content of Ni + Cu≤ 0.50%. In steel, obtained by the method of electroslag remelting, the mass fraction of sulfur should not exceed 0.01%, and phosphorus 0.025%. When steel is smelted in acid open-hearth furnaces, the mass fraction of copper is allowed up to 0.30%, while maintaining the norm of the total share of copper and nickel is not more than 0.050%.
According to GOST 21022-75, the chemical composition is given for steel grade SHKh15-DSH, obtained by remelting in vacuum-arc furnace electrodes made of steel SHKh15, made of metal electroslag remelting.

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % d4 y, % KCU, kJ/m2 HB, MPa HRC
Rolled steel. Quenching in oil from 840 °C to + Vacation
- 200 1960-2200 2160-2550 - - - - - 61-63
- 300 1670-1760 2300-2450 - - - - - 56-58
- 400 1270-1370 1810-1910 - - - - - 50-52
- 450 1180-1270 1620-1710 - - - - - 46-48
Rolled steel. Quenching in water from 810 °C to 200 °C, then oil + Leave at 150 °C, air cooling
30-60 - - ≥1670 - - - ≥490 - 62-65
A sample with a diameter of 6 mm and a length of 30 mm, the deformed and annealed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
- - ≥32 ≥42 ≥61 - ≥100 - - -
Rolled steel. Annealing at 800 °C, cooling with the furnace to 730 °C, then to 650 °C at a speed of 10-20 °C/h, air cooling
≤30 - 370-410 590-730 15-25 - 35-55 ≥432 179-207 -
A sample with a diameter of 6 mm and a length of 30 mm, the deformed and annealed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
- - ≥28 ≥48 ≥62 - ≥100 - - -
Rolled steel. Annealing at 800°C, cooling with furnace at a rate of 15 °C/h
≤30 - 370-410 590-730 ≥20 - ≥45 ≥432 - -
A sample with a diameter of 6 mm and a length of 30 mm, the deformed and annealed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
- - ≥20 ≥29 ≥72 - ≥100 - - -
- - ≥17 ≥25 ≥61 - ≥100 - - -
Rolled steel. Quenching in oil from 860 °C to + Vacation
- 400 - ≥1570 - - - ≥147 ≥480 -
A sample with a diameter of 6 mm and a length of 30 mm, the deformed and annealed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
- - ≥18 ≥22 ≥76 - ≥100 - - -
Rolled steel. Quenching in oil from 860 °C to + Vacation
- 500 ≥1030 ≥1270 ≥8 ≥34 - ≥196 ≥400 -
Rolled steel. Hardened in oil from 830 °C to + Leave at 150 °C (1.5 h exposure)
- - - ≥2550 - - - ≥880 - -
Rolled steel. Quenching in oil from 860 °C to + Vacation
- 550 ≥900 ≥1080 ≥8 ≥36 - ≥235 ≥360 -
Rolled steel. Hardened in oil from 830 °C to + Leave at 150 °C (1.5 h exposure)
- - - ≥2650 - - - ≥690 - -
Rolled steel. Quenching in oil from 860 °C to + Vacation
- 600 ≥780 ≥930 ≥10 ≥40 - ≥334 ≥325 -
Rolled steel. Hardened in oil from 830 °C to + Leave at 150 °C (1.5 h exposure)
- - - ≥2600 - - - ≥640 - -
Rolled steel. Quenching in oil from 860 °C to + Vacation
- 650 ≥690 ≥780 ≥16 ≥48 - ≥54 ≥275 -

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
d4 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number
HRC Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature Е, HPa G, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C
0 211 80 7812 - - -
20 211 - 7812 - - -
100 - - 7790 - 390 119
200 - - 7750 40 470 151
300 - - 7720 - 520 155
400 - - 7680 37 - 156
500 - - 7640 32 - 156
700 - - - - - 157

A description of the physical symbols

Name Description
Е The normal elasticity modulus
G Modulus of elasticity shear torsion
r Density
l Coefficient of thermal conductivity
R UD. the resistivity
a The coefficient of linear expansion

Technological properties

Name The value
Weldability Method of welding - CCC.
Склонность к отпускной хрупкости Inclined.
The temperature of forging Start - 1150 °C, the end - of 800 °C. the cross Sections up to 250 mm are cooled in air, 251-350 mm - in the pit.
Flock-sensitive sensitivity Sensitive.
Machinability In hot-rolled condition, when blower SB 202 HB=740 MPa Kn TV.SPL.=0,90 Kn b.St.=0,36.
Sanding behaviour Good.