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SAE-AISI 1140 Steel vs. EN 1.4742 Stainless Steel

Both SAE-AISI 1140 steel and EN 1.4742 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 1.4742 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14 to 18
17
Fatigue Strength, MPa 230 to 370
180
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 370 to 420
370
Tensile Strength: Ultimate (UTS), MPa 600 to 700
600
Tensile Strength: Yield (Proof), MPa 340 to 570
300

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
1000
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 51
19
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.0
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 1.4
2.2
Embodied Energy, MJ/kg 18
32
Embodied Water, L/kg 46
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
84
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 25
22
Strength to Weight: Bending, points 20 to 22
21
Thermal Diffusivity, mm2/s 14
5.1
Thermal Shock Resistance, points 18 to 21
21

Alloy Composition

Aluminum (Al), % 0
0.7 to 1.2
Carbon (C), % 0.37 to 0.44
0 to 0.12
Chromium (Cr), % 0
17 to 19
Iron (Fe), % 98.4 to 98.9
77.2 to 81.6
Manganese (Mn), % 0.7 to 1.0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0.7 to 1.4
Sulfur (S), % 0.080 to 0.13
0 to 0.015