SK20R

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Russia GOST SK20R Silico-calcium. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SK20R / SK20R

Category	Grade	Standard	Region/Area	Standard Content
Metals	SK20R	GOST 4762	Russia	Silico-calcium. Specifications

Chemical composition(mass fraction)(wt.%) of the SK20R

Element	Min	Max	Similar
Si	50.0000	-	-
P	-	0.0400	-
Ca	20.0000	-	-
C	-	1.0000	-
Al	-	2.0000	-

Mechanical Properties of steel grade SK20R

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)
457 (≥)	631 (≥)	22	41	44	Solution and Aging, Annealing, Ausaging, Q+T,etc	242

Physical Properties of steel grade SK20R

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
32	-	-			0.21	-
872	645	-	12.3	312		-
777	-	42	13.2			223	211

Heat Treatment of steel grade SK20R

Heat treated : 1734°C - 1348°C

Technological Curves of steel grade SK20R

No Curve

Cross Reference Table (Equivalent Grade) of SK20R

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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