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Steel 18JUA

Designation

Name The value
Designation GOST Cyrillic 18ЮА
Designation GOST Latin 18JuA
Transliteration 18YuA
The chemical elements 18Al

Description

18JUA steel is used: for the manufacture of hot-rolled bars intended for the manufacture of clad strips by hot rolling; cold rolled sheets for the manufacture of gas cylinders.

Note

Structural carbon steel of high quality.

Standards

Name Code Standards
Tapes В34 GOST 2284-79, GOST 26853-86, TU 14-4-762-76, TU 14-4-1239-83
Sheets and stripes В33 GOST 803-81, TU 14-1-4516-88
Sectional and shaped rolling В32 TU 14-1-4931-90, TU 14-1-4437-88

Mechanical characteristics

σB, MPa d4
Cold-rolled steel strip of 0.1-4.0 mm in the delivery state according to GOST 2284-79
490-830 -
310-540 ≥18
Sheet cold-rolled steel in delivery condition (autogeny and trained) on the other 14-1-4931-90.
330-450 ≥32

Description mechanical marks

Name Description
σB Limit short-term strength
d4 Elongation after rupture

Technological properties

Name The value
Macrostructure and contamination Non-metallic inclusions in steel on the other 14-1-4931-90: oxides and sulfides must not exceed 3 points according to GOST 1778. Presence of oxides and sulphides of not more than 4 points up to 20% of the number of samples tested.
Microstructure Microstructure of rolled on the other 14-1-4931-90 should have a grain size of the ferrite 7-9 points according to GOST 5639. Allowed the presence of grain of the sixth grade in the amount of not more than 50% in field of view. Allowed the grain is elongated. Form of perlite according to GOST 806 - rows A, B to points 3, inclusive. The depth of the zone of complete decarburization of the surface should not be more than 0.06 mm.

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