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Steel 30KHL

Designation

Name The value
Designation GOST Cyrillic 30ХЛ
Designation GOST Latin 30XL
Transliteration 30HL
The chemical elements 30Cr

Description

30KHL steel is used: for the manufacture of castings of the housings are shock-absorbing devices of freight cars, and other parts of various industrial; hinged cast normal strength chains for rotary kilns used in cold area when the gas stream temperature of 200−500° C and a heat exchange device of rotary cement kilns.

Standards

Name Code Standards
Castings with special properties (cast iron and steel) В83 GOST 21357-87, TU 4112-07507311-010-02
Castings, steel В82 GOST 977-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu
GOST 977-88 0.25-0.35 ≤0.04 ≤0.04 0.5-0.9 0.5-0.8 0.2-0.5 - The rest -
GOST 21357-87 0.25-0.35 ≤0.02 ≤0.02 0.5-0.9 0.5-0.8 0.2-0.5 ≤0.3 The rest ≤0.3
Fe is the basis.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d y, % kJ/m2, кДж/м2
Hardening in air, 890-910 °C + vacation at 620-660 °C, air cooling
100 ≥432 ≥677 ≥15 ≥30 ≥402
Normalization at 900-920 °C + vacation at 550-650 °C, air cooling
100 ≥285 ≥530 ≥15 ≥30 ≥265
Casting. Quenching in water from 920-950 °C + vacation at 600-650 °C, air cooling (KCU-60)
- ≥550 ≥660 ≥10 ≥20 ≥3

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d Elongation after rupture
y The relative narrowing
kJ/m2 Toughness

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