Steel 5KHNM

Designation

Name The value
Designation GOST Cyrillic 5ХНМ
Designation GOST Latin 5XHM
Transliteration 5HNM
By chemical elements 5CrНMo

Description

5KHNM steel is used: for the manufacture of forgings parts, General engineering; hammer stamps vapor and pneumatic hammers weight of falling parts over 3 tons; press tools and dies high-speed stamping machine for hot deforming of light non-ferrous alloys; blocks of matrices for inserts of horizontal forging machines; solid-rolled rings for different purposes.

Note

In the manufacture of forgings from ingots weighing more than 21 tons casting steel must be made in a vacuum.

Standards

Name Code Standards
Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006
Sheets and strips В33 GOST 4405-75, TU 14-131-971-2001
Bars and shapes В32 GOST 5950-2000, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, OST 1 92049-76, TU 14-1-1226-75, TU 14-11-245-88
Blanks. Of the workpiece. Slabs В31 OST 24.952.01-89, TU 108.06.109-87
Processing of metals by pressure. Forgings В03 TU 108.11.917-87

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
GOST 5950-2000 0.5-0.6 ≤0.03 ≤0.03 0.5-0.8 0.5-0.8 0.1-0.4 1.4-1.8 Rest ≤0.3 ≤0.15 ≤0.03 0.15-0.3 ≤0.2
Fe is the basis.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa HRC
Forgings. Quenching in oil from 850 °C + Vacation at 460-520 °C
100-200 ≥1420 ≥1570 ≥9 ≥35 ≥343 375-429 42-47
Forgings 100-200 mm. Quenching in oil from 850 °C + Vacation at 450 °C
- - - - - - - ≥43
Forgings. Quenching in oil from 850 °C + Vacation at 460-520 °C
200-300 ≥1270 ≥1470 ≥11 ≥38 ≥440 352-397 40-44
Forgings 100-200 mm. Quenching in oil from 850 °C + Vacation at 450 °C
- - - - - - - ≥39
Forgings. Quenching in oil from 850 °C + Vacation at 460-520 °C
300-500 ≥1130 ≥1320 ≥12 ≥36 ≥490 321-375 37-42
Forgings 100-200 mm. Quenching in oil from 850 °C + Vacation at 450 °C
- - - - - - - ≥37
Forgings. Quenching in oil from 850 °C + Vacation at 460-520 °C
500-700 ≥930 ≥1180 ≥15 ≥40 ≥784 302-341 35-39
100 - - - - - - ≥57

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
HRC Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature l, W/(m · °C) R, Mr. · m a, 10-6 1/°C
100 38 300 -
200 40 250 126
300 42 200 -
400 42 160 126
500 44 - -
600 46 - 142
800 - - 142

A description of the physical symbols

Name Description
Е The normal elasticity modulus
r Density
l Coefficient of thermal conductivity
R UD. the resistivity

Technological properties

Name The value
Weldability does not apply to welded structures.
Склонность к отпускной хрупкости tend not
The temperature of forging Start - 1240 °C, the end - 750 °C. the cross Sections up to 100 mm ogledate in the air, 101-350 mm - in the pit.
Flock-sensitive sensitivity sensitive
Machinability In the annealed condition with blower SB 286 HB=900 MPa Kn TV.SPL.=0.6 Kn b.St.=0.3