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S35125 Stainless Steel vs. SAE-AISI 4621 Steel

Both S35125 stainless steel and SAE-AISI 4621 steel are iron alloys. Both are furnished in the annealed condition. They have 44% 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 S35125 stainless steel and the bottom bar is SAE-AISI 4621 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
27
Fatigue Strength, MPa 200
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 370
320
Tensile Strength: Ultimate (UTS), MPa 540
500
Tensile Strength: Yield (Proof), MPa 230
360

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 12
46
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 36
3.3
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 6.4
1.6
Embodied Energy, MJ/kg 89
22
Embodied Water, L/kg 210
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
120
Resilience: Unit (Modulus of Resilience), kJ/m3 140
340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 18
18
Thermal Diffusivity, mm2/s 3.1
12
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0 to 0.1
0.18 to 0.23
Chromium (Cr), % 20 to 23
0
Iron (Fe), % 36.2 to 45.8
96.1 to 97.1
Manganese (Mn), % 1.0 to 1.5
0.7 to 0.9
Molybdenum (Mo), % 2.0 to 3.0
0.2 to 0.3
Nickel (Ni), % 31 to 35
1.7 to 2.0
Niobium (Nb), % 0.25 to 0.6
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040