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ASTM Grade HD Steel vs. S15500 Stainless Steel

Both ASTM grade HD steel and S15500 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HD steel and the bottom bar is S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 9.1
6.8 to 16
Fatigue Strength, MPa 140
350 to 650
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
75
Tensile Strength: Ultimate (UTS), MPa 590
890 to 1490
Tensile Strength: Yield (Proof), MPa 270
590 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 460
440
Maximum Temperature: Mechanical, °C 1100
820
Melting Completion (Liquidus), °C 1410
1430
Melting Onset (Solidus), °C 1370
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 16
17
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
13
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.7
Embodied Energy, MJ/kg 45
39
Embodied Water, L/kg 180
130

Common Calculations

PREN (Pitting Resistance) 29
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 44
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 180
890 to 4460
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 21
32 to 53
Strength to Weight: Bending, points 20
26 to 37
Thermal Diffusivity, mm2/s 4.3
4.6
Thermal Shock Resistance, points 19
30 to 50

Alloy Composition

Carbon (C), % 0 to 0.5
0 to 0.070
Chromium (Cr), % 26 to 30
14 to 15.5
Copper (Cu), % 0
2.5 to 4.5
Iron (Fe), % 58.4 to 70
71.9 to 79.9
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 4.0 to 7.0
3.5 to 5.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030