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EN 1.4109 Stainless Steel vs. SAE-AISI 8625 Steel

Both EN 1.4109 stainless steel and SAE-AISI 8625 steel are iron alloys. Both are furnished in the annealed condition. They have 85% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4109 stainless steel and the bottom bar is SAE-AISI 8625 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 19
25
Fatigue Strength, MPa 270
240
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 480
330
Tensile Strength: Ultimate (UTS), MPa 770
510
Tensile Strength: Yield (Proof), MPa 420
330

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 820
410
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
39
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
2.6
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.5
Embodied Energy, MJ/kg 30
20
Embodied Water, L/kg 110
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 460
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
18
Strength to Weight: Bending, points 24
18
Thermal Diffusivity, mm2/s 8.1
10
Thermal Shock Resistance, points 28
17

Alloy Composition

Carbon (C), % 0.6 to 0.75
0.23 to 0.28
Chromium (Cr), % 14 to 16
0.4 to 0.6
Iron (Fe), % 80.7 to 85
96.8 to 98
Manganese (Mn), % 0 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 0.4 to 0.8
0.15 to 0.25
Nickel (Ni), % 0
0.4 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.7
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040