FMR 66

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France AFNOR NF FMR66 Iron and steel. Wire rods made of unalloyed steel for the manufacture of high resisting cold-formed spring wires. Types and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: FMR66 / FMR 66

Category	Grade	Standard	Region/Area	Standard Content
Metals	FMR 66	NF A35-057	France	Iron and steel. Wire rods made of unalloyed steel for the manufacture of high resisting cold-formed spring wires. Types

Chemical composition(mass fraction)(wt.%) of the FMR 66

Element	Min	Max	Similar

The data is being updated,

Mechanical Properties of steel grade FMR 66

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)
368 (≥)	785 (≥)	33	11	44	Solution and Aging, Annealing, Ausaging, Q+T,etc	343

Physical Properties of steel grade FMR 66

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
43	-	-			0.21	-
381	797	-	22.3	431		-
834	-	23	22.2			421	231

Heat Treatment of steel grade FMR 66

Heat treated : 1138°C - 1549°C

Technological Curves of steel grade FMR 66

No Curve

Cross Reference Table (Equivalent Grade) of FMR 66

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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