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EN 1.4724 Stainless Steel vs. SAE-AISI 1140 Steel

Both EN 1.4724 stainless steel and SAE-AISI 1140 steel are iron alloys. They have 85% 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 EN 1.4724 stainless steel and the bottom bar is SAE-AISI 1140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
14 to 18
Fatigue Strength, MPa 170
230 to 370
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Shear Strength, MPa 340
370 to 420
Tensile Strength: Ultimate (UTS), MPa 550
600 to 700
Tensile Strength: Yield (Proof), MPa 280
340 to 570

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 850
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 21
51
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.4
Embodied Energy, MJ/kg 28
18
Embodied Water, L/kg 110
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 73
89 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 210
310 to 870
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 20
21 to 25
Strength to Weight: Bending, points 19
20 to 22
Thermal Diffusivity, mm2/s 5.6
14
Thermal Shock Resistance, points 19
18 to 21

Alloy Composition

Aluminum (Al), % 0.7 to 1.2
0
Carbon (C), % 0 to 0.12
0.37 to 0.44
Chromium (Cr), % 12 to 14
0
Iron (Fe), % 82.2 to 86.6
98.4 to 98.9
Manganese (Mn), % 0 to 1.0
0.7 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.7 to 1.4
0
Sulfur (S), % 0 to 0.015
0.080 to 0.13