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ASTM A387 Grade 5 Steel vs. S31100 Stainless Steel

Both ASTM A387 grade 5 steel and S31100 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 32 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 ASTM A387 grade 5 steel and the bottom bar is S31100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
270
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
4.5
Fatigue Strength, MPa 160 to 240
330
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 74
79
Shear Strength, MPa 310 to 380
580
Tensile Strength: Ultimate (UTS), MPa 500 to 600
1000
Tensile Strength: Yield (Proof), MPa 230 to 350
710

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 510
1100
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
16
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
3.1
Embodied Energy, MJ/kg 23
44
Embodied Water, L/kg 69
170

Common Calculations

PREN (Pitting Resistance) 6.8
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
40
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
1240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 21
36
Strength to Weight: Bending, points 18 to 20
29
Thermal Diffusivity, mm2/s 11
4.2
Thermal Shock Resistance, points 14 to 17
28

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.060
Chromium (Cr), % 4.0 to 6.0
25 to 27
Iron (Fe), % 92.1 to 95.3
63.6 to 69
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.45 to 0.65
0
Nickel (Ni), % 0
6.0 to 7.0
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Titanium (Ti), % 0
0 to 0.25