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ASTM A387 Grade 5 Steel vs. S15500 Stainless Steel

Both ASTM A387 grade 5 steel and S15500 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, 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 S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
290 to 430
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 21
6.8 to 16
Fatigue Strength, MPa 160 to 240
350 to 650
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Shear Strength, MPa 310 to 380
540 to 870
Tensile Strength: Ultimate (UTS), MPa 500 to 600
890 to 1490
Tensile Strength: Yield (Proof), MPa 230 to 350
590 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 510
820
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
2.7
Embodied Energy, MJ/kg 23
39
Embodied Water, L/kg 69
130

Common Calculations

PREN (Pitting Resistance) 6.8
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
890 to 4460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 21
32 to 53
Strength to Weight: Bending, points 18 to 20
26 to 37
Thermal Diffusivity, mm2/s 11
4.6
Thermal Shock Resistance, points 14 to 17
30 to 50

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.070
Chromium (Cr), % 4.0 to 6.0
14 to 15.5
Copper (Cu), % 0
2.5 to 4.5
Iron (Fe), % 92.1 to 95.3
71.9 to 79.9
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.45 to 0.65
0
Nickel (Ni), % 0
3.5 to 5.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030