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SAE-AISI D4 Steel vs. EN 1.4378 Stainless Steel

Both SAE-AISI D4 steel and EN 1.4378 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D4 steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.4 to 15
14 to 34
Fatigue Strength, MPa 310 to 920
340 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 460 to 1210
510 to 680
Tensile Strength: Ultimate (UTS), MPa 760 to 2060
760 to 1130
Tensile Strength: Yield (Proof), MPa 470 to 1540
430 to 970

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1430
1390
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
12
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 3.3
2.7
Embodied Energy, MJ/kg 49
39
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 15
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 160
150 to 220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 75
28 to 41
Strength to Weight: Bending, points 24 to 47
24 to 31
Thermal Shock Resistance, points 23 to 63
16 to 23

Alloy Composition

Carbon (C), % 2.1 to 2.4
0 to 0.080
Chromium (Cr), % 11 to 13
17 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 80.6 to 86.3
61.2 to 69
Manganese (Mn), % 0 to 0.6
11.5 to 14.5
Molybdenum (Mo), % 0.7 to 1.2
0
Nickel (Ni), % 0 to 0.3
2.3 to 3.7
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0 to 1.0
0