Steel 09Г2ФБ (09Г2БТ)

Fe is the basis.
According to TU 14-3-1573-96, the chemical composition is given for steel grade 09G2FB. Carbon equivalent of Se ≤ 0.43%. It is allowed to introduce into the steel a technological additive silicocalcium or rare-earth materials (REM) at the rate of 0.5-2.0 kg per 1 ton of steel.
According to TU 14-1-3979-85 the chemical composition is given for steel grade 09G2FB. The content of calcium or cerium is allowed up to 0.020%. The steel is treated with synthetic slag, argon, silicocalcium additives, silicobarium or alloys of rare-earth elements (cerium, etc.) in the amount of 1.5-2 kg / t, zirconium additive up to 0.020% is allowed. The residual content of chromium and copper is allowed up to 0.30% each, nitrogen up to 0.010%. Deviations in chemical composition are permissible in slabs: carbon ± 0.020%, manganese ± 0.10%, silicon ± 0.050%, vanadium ± 0.020%, niobium-0.010%, sulfur + 0.0020%, phosphorus + 0.0050%. The carbon equivalent of steel should not be more than 0.43. It is allowed to produce steel 09G2FB without vanadium with a mass fraction of titanium 0.05-0.09%. In this case the steel has the designation 09G2BT. In steel 09Г2БТ admissible deviations in titanium + 0,010%.