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4140

Data Table for: Steel Grades : Carbon Steel : 4140

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Quantity
Value
Unit

Young's modulus
Tensile strength
Elongation
Fatigue
Yield strength

200000 - 200000
650 - 880
8 - 25
275 - 275
350 - 550

MPa
MPa
%
MPa
MPa

Physical Properties

Quantity
Value
Unit

Thermal expansion
Thermal conductivity
Specific heat
Melting temperature
Density
Resistivity

10 - 10
25 - 25
460 - 460
1450 - 1510
7700 - 7700
0.55 - 0.55

e-6/K
W/m.K
J/kg.K
°C
kg/m³
Ohm.mm²/m

Heat Treatment:

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Can produce 4140 specifications and size

Steel grade
Specification
Processing range(mm)

4140
4140
4140
4140
4140
4140

Φ1 to Φ2000
10 to 1000
0.08 to 800(T)*10 to 1500(W)*Long
Pipe/tube/slugs/donuts/cubes/other shapes
OD: Φ4-410; WT: 1-35 mm
THK:0.1mm Width:1500mm

Description

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.38-0.43	0.15-0.35	0.75-1.0	0.025	0.015	0.8-1.1
Mo	Al	Cu	Nb	Ti	V	Ce
0.15-0.25	0.05	0.3		+
N	O2	Pb	B	Other
	0.002

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