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Steel 12K

Designation

Name The value
Designation GOST Cyrillic 12К
Designation GOST Latin 12K
Transliteration 12K
The chemical elements 12

Description

12K steel is used: for the manufacture of parts of boilers and sosudov working under pressure at ambient, elevated and reduced temperatures.

Note

From 01.01.1991 steel stamps 12K is not allowed to use in the newly created and upgraded technology.

Standards

Name Code Standards
Sheets and stripes В23 GOST 19903-74, GOST 19903-90, GOST 5520-69

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % kJ/m2, кДж/м2
Leaves categories: 2-5, 10, 11, 16, 18 (KCU - as supplied / after mechanical aging)
≤20 ≥225 350-440 ≥24 ≥780/390
21-40 ≥215 350-440 ≥24 ≥780/390
41-60 ≥205 350-440 ≥24 ≥780/390

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
kJ/m2 Toughness

Technological properties

Name The value
Weldability Welded without any restrictions.

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