B 1

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France AFNOR NF B1 Railway transport equipment. Recommended steels for railway rolling-stock construction. VIII: spring steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: B1 / B 1

Category	Grade	Standard	Region/Area	Standard Content
Metals	B 1	NF F 80-108	France	Railway transport equipment. Recommended steels for railway rolling-stock construction. VIII: spring steels

Chemical composition(mass fraction)(wt.%) of the B 1

Element	Min	Max	Similar
C	0.5500	0.8000	-

Mechanical Properties of steel grade B 1

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)
489 (≥)	248 (≥)	31	14	13	Solution and Aging, Annealing, Ausaging, Q+T,etc	144

Physical Properties of steel grade B 1

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
33	-	-			0.24	-
578	787	-	21.3	423		-
716	-	21	12.2			133	333

Heat Treatment of steel grade B 1

Heat treated : 1114°C - 1899°C

Technological Curves of steel grade B 1

No Curve

Cross Reference Table (Equivalent Grade) of B 1

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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B 1