1.8070 (21CrMoV5-11)

Country	Section	Category
Germany	Structural, Pressure Vessel and Engineering Steels	Cr-Si-Mo, Cr-Si-Mn-Mo, Cr-Si-Mo-V, Cr-Si-Mn-Mo-V

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	V, %	P, %	C, %	S, %	Mo, %
	94.83–96.78	0.3–0.6	0.3–0.6	1.2–1.5	< 0.6	0.25–0.35	< 0.035	0.17–0.25	< 0.035	1–1.2

Rolling	Standard	Size, mm	Tension	Classifiers	$$\sigma _{U}$$, $$MPa$$	$$\sigma_{Y}$$, $$MPa$$	$$\epsilon_L$$, %	$$KU$$, $$J$$	Treatment
					690–830	> 540	< 16	> 55	After quenching and tempering or tempering

Parameter	Units of measurement	Description
$$\sigma_{Y}$$	$$MPa$$	Yield strength
$$\sigma _{U}$$	$$MPa$$	Ultimate tensile strength
$$\epsilon_L$$	%	Elongation at break (longitudinal)
$$KU$$	$$J$$	Impact energy