|Designation GOST Cyrillic||11ЮА|
|Designation GOST Latin||11JuA|
|By chemical elements||11Al|
Steel 11JUA used: for the manufacture of grooved machined bars with diameter 20−60 mm; hot-rolled bars intended for the manufacture of clad strips by hot rolling; cold-rolled strip thickness of 1.37 mm and a width of 122−160 mm, intended for manufacturing parts by the method of deep drawing.
Structural steel is low carbon high quality.
Steel 11JUA stamps can be manufactured with additional microalloying with vanadium, titanium and boron.
|Sheets and strips||В33||GOST 803-81, TU 14-1-4516-88|
|Blanks. Of the workpiece. Slabs||В31||TU 14-1-1117-74|
|Bars and shapes||В22||TU 14-1-3455-82|
|Sheets and strips||В23||TU 14-1-4632-93|
|Steel pipes and fittings to them||В62||TU 14-3-463-2005|
According to GOST 803-81, the mass fraction of chromium is allowed not more than 0.20% with a mass fraction of carbon not exceeding 0.18%.
According to TU 14-1-3455-82, the chemical composition is presented for grade 11YuA. In steel 11YAA, the deviation by mass fraction of nickel is allowed to be +0.010%.
Steel grade 11YuA with additional microalloying according to TU 14-1-3455-82 has mass fractions of alloying elements in the amount: vanadium - 0,04-0,08%, titanium - 0,02-0,08% and boron 0,001-0,006 %.
According to TU 14-1-3455-82 in some cases, the supply of bars from steel grades 11YuA and 11YuA with microalloying with a mass fraction of sulfur 0.026-0.027%. In the steel grades 11YuA and 11YuA with microalloying, the mass fraction of chromium is allowed up to 0.25% with a mass fraction of carbon not exceeding 0.11%. Upon agreement with the consumer in grade 11YuA steel with microalloying, the mass fraction of nickel is 0.25% and nitrogen up to 0.009%.
|Section, mm||σU, MPa||d10|
|Cold-rolled steel strip according to GOST otoshiana 8851-75 on delivery|
|Bars grooved machined steel without microalloying in the state of delivery on the other 14-1-3455-82|
Description mechanical marks
|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|
|Macrostructure and pollution||The macrostructure of bars on the other 14-1-3455-82 when plavochek control should not have a discontinuity of metal in the form nezavisima bubbles, remnants of shrinkage looseness, delamination, subcortical bubbles, rough defects are visible without the use of magnifying devices and shall conform to the requirements scores no more: Central porosity - 3 points, a point inhomogeneity - 3 points, liquation Pousada - 1.5 points. Bars put control of grain ferrite and ferrite of poloschatosti. Grain ferrite should be not larger than 5 points, banding of ferritic - no more than 2 points. Rods control on the contamination of steel by nonmetallic inclusions. The content of nonmetallic inclusions by the maximum score should be no more than: oxides (OS, CX, SP) - 3 points, the sulphides (A) - 3 points. Presence of oxides in steel up to 3.5 points up to 20% of the mass of delivery.|