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S31727 Stainless Steel vs. SAE-AISI 4130 Steel

Both S31727 stainless steel and SAE-AISI 4130 steel are iron alloys. They have 59% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is SAE-AISI 4130 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
13 to 26
Fatigue Strength, MPa 240
320 to 660
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 430
340 to 640
Tensile Strength: Ultimate (UTS), MPa 630
530 to 1040
Tensile Strength: Yield (Proof), MPa 270
440 to 980

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1010
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 24
2.4
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 4.7
1.5
Embodied Energy, MJ/kg 64
20
Embodied Water, L/kg 180
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
83 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 190
500 to 2550
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
19 to 37
Strength to Weight: Bending, points 20
19 to 29
Thermal Shock Resistance, points 14
16 to 31

Alloy Composition

Carbon (C), % 0 to 0.030
0.28 to 0.33
Chromium (Cr), % 17.5 to 19
0.8 to 1.1
Copper (Cu), % 2.8 to 4.0
0
Iron (Fe), % 53.7 to 61.3
97.3 to 98.2
Manganese (Mn), % 0 to 1.0
0.4 to 0.6
Molybdenum (Mo), % 3.8 to 4.5
0.15 to 0.25
Nickel (Ni), % 14.5 to 16.5
0
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040