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Steel 20DKHL

Designation

Name The value
Designation GOST Cyrillic 20ДХЛ
Designation GOST Latin 20DXL
Transliteration 20DHL
The chemical elements 20CuCr

Description

20DKHL steel is used: for the production of castings for critical loaded parts, which are requirements of high strength and sufficient toughness, working under static and dynamic loads.

Standards

Name Code Standards
Castings, steel В82 GOST 977-88, OST 3-4365-79

Chemical composition

Standard C S P Mn Cr Si Fe Cu
GOST 977-88 0.15-0.25 ≤0.04 ≤0.04 0.5-0.8 0.8-1.1 0.2-0.4 The rest 1.4-1.6
Fe is the basis.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2 Brinell hardness number, MPa
Annealing in air with 880-890 °C + vacation at 560-600 °C, air cooling
100 ≥540 ≥638 ≥12 ≥30 ≥392 -
Normalization with 880-890 °C + vacation at 560-600 °C, air cooling
100 ≥392 ≥491 ≥12 ≥30 ≥294 143-187

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
d5 Elongation after rupture
y The relative narrowing
kJ/m2 Toughness

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