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ASTM A387 Grade 5 Steel vs. S31254 Stainless Steel

Both ASTM A387 grade 5 steel and S31254 stainless steel are iron alloys. They have 60% of their average alloy composition in common. There are 32 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 ASTM A387 grade 5 steel and the bottom bar is S31254 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
40
Fatigue Strength, MPa 160 to 240
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
80
Shear Strength, MPa 310 to 380
490
Tensile Strength: Ultimate (UTS), MPa 500 to 600
720
Tensile Strength: Yield (Proof), MPa 230 to 350
330

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 510
1090
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 40
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
28
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.7
5.5
Embodied Energy, MJ/kg 23
74
Embodied Water, L/kg 69
190

Common Calculations

PREN (Pitting Resistance) 6.8
44
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
240
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18 to 21
25
Strength to Weight: Bending, points 18 to 20
22
Thermal Diffusivity, mm2/s 11
3.8
Thermal Shock Resistance, points 14 to 17
15

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.020
Chromium (Cr), % 4.0 to 6.0
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 92.1 to 95.3
51.4 to 56.3
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.45 to 0.65
6.0 to 6.5
Nickel (Ni), % 0
17.5 to 18.5
Nitrogen (N), % 0
0.18 to 0.22
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.8
Sulfur (S), % 0 to 0.025
0 to 0.010