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ASTM Grade HI Steel vs. S21603 Stainless Steel

Both ASTM grade HI steel and S21603 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HI steel and the bottom bar is S21603 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
45
Fatigue Strength, MPa 150
360
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
79
Tensile Strength: Ultimate (UTS), MPa 550
690
Tensile Strength: Yield (Proof), MPa 270
390

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Expansion, µm/m-K 17
17

Otherwise Unclassified Properties

Base Metal Price, % relative 23
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.1
3.6
Embodied Energy, MJ/kg 59
50
Embodied Water, L/kg 200
160

Common Calculations

PREN (Pitting Resistance) 29
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
270
Resilience: Unit (Modulus of Resilience), kJ/m3 180
380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
25
Strength to Weight: Bending, points 19
22
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.030
Chromium (Cr), % 26 to 30
17.5 to 22
Iron (Fe), % 46.9 to 59.8
57.6 to 67.8
Manganese (Mn), % 0 to 2.0
7.5 to 9.0
Molybdenum (Mo), % 0 to 0.5
2.0 to 3.0
Nickel (Ni), % 14 to 18
5.0 to 7.0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030