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EN 1.4857 Stainless Steel vs. SAE-AISI 8655 Steel

Both EN 1.4857 stainless steel and SAE-AISI 8655 steel are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 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 1.4857 stainless steel and the bottom bar is SAE-AISI 8655 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 6.7
23
Fatigue Strength, MPa 120
290
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 500
620
Tensile Strength: Yield (Proof), MPa 250
410

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1370
1460
Melting Onset (Solidus), °C 1320
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 13
39
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 34
2.6
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 5.7
1.5
Embodied Energy, MJ/kg 81
20
Embodied Water, L/kg 220
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28
130
Resilience: Unit (Modulus of Resilience), kJ/m3 150
440
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
22
Strength to Weight: Bending, points 18
21
Thermal Diffusivity, mm2/s 3.4
10
Thermal Shock Resistance, points 11
18

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.51 to 0.59
Chromium (Cr), % 24 to 27
0.4 to 0.6
Iron (Fe), % 31.4 to 41.7
96.4 to 97.6
Manganese (Mn), % 0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.25
Nickel (Ni), % 33 to 36
0.4 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 1.0 to 2.5
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040