321 S 51-490

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England B.S. 321S51-490 Specification for steels for fired and unfired pressure vessels: sections and bars and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 321S51-490 / 321 S 51-490

Category	Grade	Standard	Region/Area	Standard Content
Metals	321 S 51-490	BS 1502	England	Specification for steels for fired and unfired pressure vessels: sections and bars

Chemical composition(mass fraction)(wt.%) of the 321 S 51-490

Element	Min	Max	Similar
Ti	-	-	-
Si	-	1.0000	-
S	-	0.0250	-
P	-	0.0400	-
Ni	9.0000	12.0000	-
Mo	-	0.7000	-
Mn	-	2.0000	-
Cu	-	0.5000	-
Cr	17.0000	19.0000	-
C	0.0400	0.1000	-
B	-	0.0050	-

Mechanical Properties of steel grade 321 S 51-490

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)
865 (≥)	536 (≥)	32	44	13	Solution and Aging, Annealing, Ausaging, Q+T,etc	413

Physical Properties of steel grade 321 S 51-490

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
13	-	-			0.22	-
334	838	-	23.3	434		-
649	-	33	33.2			122	414

Heat Treatment of steel grade 321 S 51-490

Heat treated : 1399°C - 1334°C

Technological Curves of steel grade 321 S 51-490

No Curve

Cross Reference Table (Equivalent Grade) of 321 S 51-490

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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