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SAE-AISI 4340M Steel vs. EN 1.7376 Steel

Both SAE-AISI 4340M steel and EN 1.7376 steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is EN 1.7376 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 6.0
20
Fatigue Strength, MPa 690
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Tensile Strength: Ultimate (UTS), MPa 2340
710
Tensile Strength: Yield (Proof), MPa 1240
460

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Mechanical, °C 430
600
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 38
26
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
9.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
11

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
2.1
Embodied Energy, MJ/kg 26
29
Embodied Water, L/kg 55
88

Common Calculations

PREN (Pitting Resistance) 2.2
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
560
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
25
Strength to Weight: Bending, points 51
23
Thermal Diffusivity, mm2/s 10
6.9
Thermal Shock Resistance, points 70
20

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.12 to 0.19
Chromium (Cr), % 0.7 to 1.0
8.0 to 10
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 93.3 to 94.8
86.2 to 90.6
Manganese (Mn), % 0.65 to 0.9
0.35 to 0.65
Molybdenum (Mo), % 0.35 to 0.45
0.9 to 1.2
Nickel (Ni), % 1.7 to 2.0
0 to 0.4
Phosphorus (P), % 0 to 0.012
0 to 0.030
Silicon (Si), % 1.5 to 1.8
0 to 1.0
Sulfur (S), % 0 to 0.012
0 to 0.030
Vanadium (V), % 0.050 to 0.1
0 to 0.050