1H2M1

Hardness 1H2M1 pipe hot deformity. GOST 550−75 HB 10 ^-1 = 227 MPa .

for the production of double-layer sheet steel and seamless pipes for the oil refining and petrochemical industry

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Structural steel	Low alloy structural steel for welded structures

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %	Mo, %
GOST 550-75	94.43–96.55	0.17–0.37	0.3–0.6	2–2.5	< 0.3	< 0.5	< 0.035	0.08–0.13	< 0.035	0.9–1.1

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Sheet		30–60			450	240	19		800
Trumpet	GOST 550-75			hot rolling	441	265	20	45	980

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Trumpet	GOST 550-75	hot rolling	227

Analogues

Germany	USA
Germany	USA
BGH 7380	2 1/4 Cr 1 Mo

Standards

Standard	Description
Standard	Description
GOST 550-75

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Cu	%	Copper
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
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness