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EN 1.4945 Stainless Steel vs. SAE-AISI D4 Steel

Both EN 1.4945 stainless steel and SAE-AISI D4 steel are iron alloys. They have 75% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4945 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, % 19 to 34
8.4 to 15
Fatigue Strength, MPa 230 to 350
310 to 920
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
74
Shear Strength, MPa 430 to 460
460 to 1210
Tensile Strength: Ultimate (UTS), MPa 640 to 740
760 to 2060
Tensile Strength: Yield (Proof), MPa 290 to 550
470 to 1540

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1490
1430
Melting Onset (Solidus), °C 1440
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
31
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
5.0

Otherwise Unclassified Properties

Base Metal Price, % relative 30
8.0
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 5.0
3.3
Embodied Energy, MJ/kg 73
49
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 23
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
100 to 160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 25
27 to 75
Strength to Weight: Bending, points 20 to 22
24 to 47
Thermal Diffusivity, mm2/s 3.7
8.3
Thermal Shock Resistance, points 14 to 16
23 to 63

Alloy Composition

Carbon (C), % 0.040 to 0.1
2.1 to 2.4
Chromium (Cr), % 15.5 to 17.5
11 to 13
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 57.9 to 65.7
80.6 to 86.3
Manganese (Mn), % 0 to 1.5
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 15.5 to 17.5
0 to 0.3
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.3 to 0.6
0 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 2.5 to 3.5
0
Vanadium (V), % 0
0 to 1.0