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EN 1.4378 Stainless Steel vs. SAE-AISI A4 Steel

Both EN 1.4378 stainless steel and SAE-AISI A4 steel are iron alloys. They have 69% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is EN 1.4378 stainless steel and the bottom bar is SAE-AISI A4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 760 to 1130
710 to 2050

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Melting Completion (Liquidus), °C 1390
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
3.9
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.7
1.8
Embodied Energy, MJ/kg 39
24
Embodied Water, L/kg 150
59

Common Calculations

PREN (Pitting Resistance) 23
5.3
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 41
25 to 73
Strength to Weight: Bending, points 24 to 31
23 to 46
Thermal Shock Resistance, points 16 to 23
23 to 67

Alloy Composition

Carbon (C), % 0 to 0.080
1.0 to 1.1
Chromium (Cr), % 17 to 19
0.9 to 2.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 61.2 to 69
92 to 95.5
Manganese (Mn), % 11.5 to 14.5
1.8 to 2.2
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 2.3 to 3.7
0 to 0.3
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.060
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030