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EN 1.8550 Steel vs. SAE-AISI D4 Steel

Both EN 1.8550 steel and SAE-AISI D4 steel are iron alloys. They have 86% 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 1.8550 steel and the bottom bar is SAE-AISI D4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
8.4 to 15
Fatigue Strength, MPa 470
310 to 920
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
74
Shear Strength, MPa 600
460 to 1210
Tensile Strength: Ultimate (UTS), MPa 1000
760 to 2060
Tensile Strength: Yield (Proof), MPa 760
470 to 1540

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 40
31
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
5.0

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
8.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
3.3
Embodied Energy, MJ/kg 23
49
Embodied Water, L/kg 67
100

Common Calculations

PREN (Pitting Resistance) 2.3
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
100 to 160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 36
27 to 75
Strength to Weight: Bending, points 29
24 to 47
Thermal Diffusivity, mm2/s 11
8.3
Thermal Shock Resistance, points 29
23 to 63

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.3 to 0.37
2.1 to 2.4
Chromium (Cr), % 1.5 to 1.8
11 to 13
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 94.4 to 96.3
80.6 to 86.3
Manganese (Mn), % 0.4 to 0.7
0 to 0.6
Molybdenum (Mo), % 0.15 to 0.25
0.7 to 1.2
Nickel (Ni), % 0.85 to 1.2
0 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.035
0 to 0.030
Vanadium (V), % 0
0 to 1.0