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EN 1.4655 Stainless Steel vs. SAE-AISI 8625 Steel

Both EN 1.4655 stainless steel and SAE-AISI 8625 steel are iron alloys. They have 71% of their average alloy composition in common. 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 1.4655 stainless steel and the bottom bar is SAE-AISI 8625 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23 to 25
25
Fatigue Strength, MPa 320
240
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 460
330
Tensile Strength: Ultimate (UTS), MPa 720 to 730
510
Tensile Strength: Yield (Proof), MPa 450 to 480
330

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1050
410
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.6
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.5
Embodied Energy, MJ/kg 41
20
Embodied Water, L/kg 160
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 160
110
Resilience: Unit (Modulus of Resilience), kJ/m3 510 to 580
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 4.0
10
Thermal Shock Resistance, points 20
17

Alloy Composition

Carbon (C), % 0 to 0.030
0.23 to 0.28
Chromium (Cr), % 22 to 24
0.4 to 0.6
Copper (Cu), % 1.0 to 3.0
0
Iron (Fe), % 63.6 to 73.4
96.8 to 98
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 0.1 to 0.6
0.15 to 0.25
Nickel (Ni), % 3.5 to 5.5
0.4 to 0.7
Nitrogen (N), % 0.050 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040