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EN 1.4938 Stainless Steel vs. SAE-AISI D4 Steel

Both EN 1.4938 stainless steel and SAE-AISI D4 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 29 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 1.4938 stainless steel and the bottom bar is SAE-AISI D4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 16 to 17
8.4 to 15
Fatigue Strength, MPa 390 to 520
310 to 920
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
74
Shear Strength, MPa 540 to 630
460 to 1210
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
760 to 2060
Tensile Strength: Yield (Proof), MPa 640 to 870
470 to 1540

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 30
31
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
5.0

Otherwise Unclassified Properties

Base Metal Price, % relative 10
8.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.3
3.3
Embodied Energy, MJ/kg 47
49
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 18
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
100 to 160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
27 to 75
Strength to Weight: Bending, points 26 to 29
24 to 47
Thermal Diffusivity, mm2/s 8.1
8.3
Thermal Shock Resistance, points 30 to 35
23 to 63

Alloy Composition

Carbon (C), % 0.080 to 0.15
2.1 to 2.4
Chromium (Cr), % 11 to 12.5
11 to 13
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 80.5 to 84.8
80.6 to 86.3
Manganese (Mn), % 0.4 to 0.9
0 to 0.6
Molybdenum (Mo), % 1.5 to 2.0
0.7 to 1.2
Nickel (Ni), % 2.0 to 3.0
0 to 0.3
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.25 to 0.4
0 to 1.0

Comparable Variants