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SAE-AISI 1140 Steel vs. EN 1.4594 Stainless Steel

Both SAE-AISI 1140 steel and EN 1.4594 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 30 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 1140 steel and the bottom bar is EN 1.4594 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14 to 18
11 to 17
Fatigue Strength, MPa 230 to 370
490 to 620
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Shear Strength, MPa 370 to 420
620 to 700
Tensile Strength: Ultimate (UTS), MPa 600 to 700
1020 to 1170
Tensile Strength: Yield (Proof), MPa 340 to 570
810 to 1140

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
820
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
16
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
15
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
3.2
Embodied Energy, MJ/kg 18
45
Embodied Water, L/kg 46
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
110 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
1660 to 3320
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 25
36 to 41
Strength to Weight: Bending, points 20 to 22
29 to 31
Thermal Diffusivity, mm2/s 14
4.4
Thermal Shock Resistance, points 18 to 21
34 to 39

Alloy Composition

Carbon (C), % 0.37 to 0.44
0 to 0.070
Chromium (Cr), % 0
13 to 15
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 98.4 to 98.9
72.6 to 79.5
Manganese (Mn), % 0.7 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
1.2 to 2.0
Nickel (Ni), % 0
5.0 to 6.0
Niobium (Nb), % 0
0.15 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 0.7
Sulfur (S), % 0.080 to 0.13
0 to 0.015