L 290 NB

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France AFNOR NF L290NB 对接焊接管件 - 第2部分：有特殊检验要求非合金和铁素体合金钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: L290NB / L 290 NB

Category	Grade	Standard	Region/Area	Standard Content
Metals	L 290 NB	NF EN 10253-2	France	对接焊接管件 - 第2部分：有特殊检验要求非合金和铁素体合金钢

Chemical composition(mass fraction)(wt.%) of the L 290 NB

Element	Min	Max	Similar
V	-	0.0500	-
Ti	-	0.0400	-
Si	-	0.4000	-
S	-	0.0200	-
P	-	0.0250	-
Other	-	-	-
Ni	-	0.3000	-
Nb	-	0.0500	-
N	-	0.0120	-
Mo	-	0.1000	-
Mn	-	1.2000	-
Cu	-	0.2500	-
Cr	-	0.3000	-
CEV	-	0.4200	-
C	-	0.1700	-
Al	0.0150	0.0600	-

Mechanical Properties of steel grade L 290 NB

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)
435 (≥)	845 (≥)	21	32	23	Solution and Aging, Annealing, Ausaging, Q+T,etc	134

Physical Properties of steel grade L 290 NB

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
31	-	-			0.31	-
637	375	-	41.3	141		-
237	-	21	21.2			222	213

Heat Treatment of steel grade L 290 NB

Heat treated : 1442°C - 1945°C

Technological Curves of steel grade L 290 NB

No Curve

Cross Reference Table (Equivalent Grade) of L 290 NB

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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