Steel 34ХН1М (0ХН1М)

Designation

Name The value
Designation GOST Cyrillic 34ХН1М
Designation GOST Latin 34XH1M
Transliteration 34HN1M
By chemical elements 34CrН1Mo
Name The value
Designation GOST Cyrillic 0ХН1М
Designation GOST Latin 0XH1M
Transliteration 0HN1M
By chemical elements 0CrН1Mo

Description

34ХН1М steel is used: for the manufacture of forgings of various parts of General engineering; solid-rolled rings for different purposes, disks, shafts, rotors of turbines and compressors, excavators, shafts, axles and couplings, gears, hubs, shaft-pinion, bolt, weight pins, and other critical high-load parts, which meet high requirements for mechanical properties and working temperatures up to +500 °C; backup rolls of rolling mills.

Note

Steel high-alloyed quality.

Standards

Name Code Standards
Processing of metals by pressure. Forgings В03 GOST 8479-70, TU 108-11-38-76, TU 0306.018-80, TU 108.11.917-87, ST ЦКБА 010-2004
Bars and shapes В32 OST 1 92049-76

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Mo
TU 108.11.917-87 0.3-0.4 ≤0.035 ≤0.03 0.5-0.8 1.3-1.7 0.17-0.37 1.3-1.7 Rest ≤0.3 0.2-0.3
Fe is the basis.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
Forgings. Hardening + Vacation
300-500 ≥315 ≥570 ≥12 - ≥290 167-207
100-300 ≥440 ≥635 ≥14 - ≥540 197-235
300-500 ≥440 ≥635 ≥13 - ≥490 197-235
500-800 ≥440 ≥635 ≥11 - ≥390 197-235
100 ≥440 ≥635 ≥16 - ≥590 197-235
100-300 ≥490 ≥655 ≥13 - ≥540 212-248
300-500 ≥490 ≥655 ≥12 - ≥490 212-248
500-800 ≥490 ≥655 ≥11 - ≥390 212-248
100-300 ≥540 ≥685 ≥13 - ≥490 223-262
300-500 ≥540 ≥685 ≥12 - ≥440 223-262
100 ≥540 ≥685 ≥15 - ≥590 223-262
100-300 ≥590 ≥735 ≥13 - ≥490 235-277
300-500 ≥590 ≥735 ≥12 - ≥440 235-277
100-300 ≥640 ≥785 ≥12 - ≥490 248-293
100 ≥640 ≥785 ≥13 - ≥590 248-293
100-300 ≥685 ≥835 ≥12 - ≥490 262-311
100 ≥685 ≥835 ≥13 - ≥590 262-311
100 ≥735 ≥880 ≥13 - ≥590 277-321
Forgings. Normalization
100-300 ≥395 ≥615 ≥15 - ≥540 187-229
100 ≥395 ≥615 ≥17 - ≥590 187-229
The sample with diameter of 6 and a length of 30 mm and extruded. The rate of deformation of 16 mm/sec. The strain rate of 0.009 1/s.
- ≥89 ≥15 ≥49 ≥84 - -
- ≥39 ≥58 ≥46 ≥65 - -
- ≥20 ≥27 ≥45 ≥100 - -
Forging. Quenching in oil from 860 °C to + Vacation at 660 °C
- 590-640 790-820 19-23 ≥68 200-250 -
- ≥560 ≥740 18-20 62-68 - -
- ≥520 ≥730 ≥15 54-56 - -
- ≥480 630-670 19-21 ≥72 - -
- 440-470 510-520 22-24 83-84 - -
Forgings. Isothermal annealing of 860-870 °C, exposure at 640-660 °C, then cooling with the furnace
700 ≥320 ≥580 ≥11 - ≥300 167-207

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
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Technological properties

Name The value
Weldability limited weldability. Welding methods: SMAW, ESW.
Склонность к отпускной хрупкости malosana
The temperature of forging Start - 1240 °C, the end - 780 °C. the cross Sections up to 100 mm are cooled in air, 101-300 mm in the pit.
Flock-sensitive sensitivity highly sensitive
Machinability After annealing at NV 210-230 blower SB=650 MPa Kn TV.SPL.=0.8