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S20431 Stainless Steel vs. ASTM Grade HD Steel

Both S20431 stainless steel and ASTM grade HD steel are iron alloys. They have 86% of their average alloy composition in common. There are 31 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 S20431 stainless steel and the bottom bar is ASTM grade HD steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 46
9.1
Fatigue Strength, MPa 320
140
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 710
590
Tensile Strength: Yield (Proof), MPa 350
270

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 410
460
Maximum Temperature: Mechanical, °C 890
1100
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1360
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
17
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.5
3.1
Embodied Energy, MJ/kg 36
45
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 20
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
44
Resilience: Unit (Modulus of Resilience), kJ/m3 310
180
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 25
21
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 4.0
4.3
Thermal Shock Resistance, points 15
19

Alloy Composition

Carbon (C), % 0 to 0.12
0 to 0.5
Chromium (Cr), % 17 to 18
26 to 30
Copper (Cu), % 1.5 to 3.5
0
Iron (Fe), % 66.1 to 74.4
58.4 to 70
Manganese (Mn), % 5.0 to 7.0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 2.0 to 4.0
4.0 to 7.0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040