12H8

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Russia GOST 12H8 Seamless steel tubes for petroleum processing and petrochemical industry. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 12H8 / 12H8

Category	Grade	Standard	Region/Area	Standard Content
Metals	12H8	GOST 550	Russia	Seamless steel tubes for petroleum processing and petrochemical industry. Specifications

Chemical composition(mass fraction)(wt.%) of the 12H8

Element	Min	Max	Similar
Si	0.1700	0.3700	-
S	-	0.0300	-
P	-	0.0350	-
Ni	-	0.4000	-
Mn	0.3000	0.6000	-
Cu	-	0.2500	-
Cr	7.5000	9.0000	-
C	-	0.1200	-

Mechanical Properties of steel grade 12H8

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
395 (≥)	671 (≥)	41	12	12	Solution and Aging, Annealing, Ausaging, Q+T,etc	132

Physical Properties of steel grade 12H8

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
14	-	-			0.12	-
646	734	-	34.3	324		-
921	-	22	33.2			321	341

Heat Treatment of steel grade 12H8

Heat treated : 1578°C - 1593°C

Technological Curves of steel grade 12H8

No Curve

Cross Reference Table (Equivalent Grade) of 12H8

Grade	Standard	Country	Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1

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