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SAE-AISI 4340M Steel vs. EN 1.4310 Stainless Steel

Both SAE-AISI 4340M steel and EN 1.4310 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 32 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 1.4310 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
200 to 270
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.0
14 to 45
Fatigue Strength, MPa 690
240 to 330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 1360
510 to 550
Tensile Strength: Ultimate (UTS), MPa 2340
730 to 900
Tensile Strength: Yield (Proof), MPa 1240
260 to 570

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Mechanical, °C 430
910
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
15
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
14
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
2.9
Embodied Energy, MJ/kg 26
42
Embodied Water, L/kg 55
140

Common Calculations

PREN (Pitting Resistance) 2.2
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
170 to 830
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
26 to 32
Strength to Weight: Bending, points 51
23 to 27
Thermal Diffusivity, mm2/s 10
4.0
Thermal Shock Resistance, points 70
15 to 18

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.050 to 0.15
Chromium (Cr), % 0.7 to 1.0
16 to 19
Iron (Fe), % 93.3 to 94.8
66.4 to 78
Manganese (Mn), % 0.65 to 0.9
0 to 2.0
Molybdenum (Mo), % 0.35 to 0.45
0 to 0.8
Nickel (Ni), % 1.7 to 2.0
6.0 to 9.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.012
0 to 0.045
Silicon (Si), % 1.5 to 1.8
0 to 2.0
Sulfur (S), % 0 to 0.012
0 to 0.015
Vanadium (V), % 0.050 to 0.1
0