1.0987 (S550NC)

Country	Section	Category
Country	Section	Category
Germany	Alloy Steels	Steels for Other Applications

Standard	Fe, %	Si, %	Mn, %	Al, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Al, %	P, %	C, %	S, %
	> 97.515	< 0.6	< 1.55	< 0.025	< 0.035	< 0.24	< 0.035

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\epsilon_L$ , %	$KV_{T}$ , $J$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\epsilon_L$ , %	$KV_{T}$ , $J$	Treatment
					600–750	> 540	> 16	> 28	Stress relief 0.5 hours 530/580 ° С. Normalization 1 max. 2 minutes. At mm thickness of 920/950 ° C (usually lowered).

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