σU
MPa
ϵL(L0=5.65So√)
ϵT
ReH
MPa
ψ
KVL
J
KVT
J

1.6580 (30CrNiMo8)

Classification

Country	Section	Category
Country	Section	Category
Germany	Structural, Pressure Vessel and Engineering Steels	Cr-Ni-Mo with Mo < 0.4% + Ni < 0.2%

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
	93.5–95.34	< 0.4	0.5–0.8	1.8–2.2	1.8–2.2	< 0.025	0.26–0.34	< 0.035	0.3–0.5

Information on suppliers

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$ , %	$\epsilon_T$ , %	$R_{eH}$ , $MPa$	$\psi$ , %	$KV_{L}$ , $J$	$KV_{T}$ , $J$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$ , %	$\epsilon_T$ , %	$R_{eH}$ , $MPa$	$\psi$ , %	$KV_{L}$ , $J$	$KV_{T}$ , $J$	Treatment
		< 16		moderate hardening	1250–1450	9	8–14	1050	40	30–45	20–27
		16–40		moderate hardening	1250–1450	9		1050	40
		40–100		moderate hardening	1000–1300	10		900	45
		100–160		moderate hardening	1000–1200	11		800	50
		160–250		moderate hardening	850–1100	12		700	50
		250–330		moderate hardening	850
		330–660		moderate hardening	800			590
		< 160		moderate hardening				700
		160–330		moderate hardening				630

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
		annealing, soft	248–255

Analogues

CIS, Russia, Ukraine
CIS, Russia, Ukraine
30HN2MA

Standards

Standard	Description
Standard	Description
EN 10083-1
EN 10250-3
EN 10269
EN 10277-5
SEW550

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$	%	Elongation at break (longitudinal) (for L₀ = 5.65√So)
$\epsilon_T$	%	Elongation at break (transverse)
$R_{eH}$	$MPa$	Upper yield point
$\psi$	%	Reduction in cross section on fracture
$KV_{L}$	$J$	Impact energy (longitudinal)
$KV_{T}$	$J$	Impact energy (transverse)