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ASTM Grade HI Steel vs. S35125 Stainless Steel

Both ASTM grade HI steel and S35125 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 31 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 grade HI steel and the bottom bar is S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
39
Fatigue Strength, MPa 150
200
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 550
540
Tensile Strength: Yield (Proof), MPa 270
230

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 450
490
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 23
36
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 4.1
6.4
Embodied Energy, MJ/kg 59
89
Embodied Water, L/kg 200
210

Common Calculations

PREN (Pitting Resistance) 29
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
170
Resilience: Unit (Modulus of Resilience), kJ/m3 180
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 20
19
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 3.9
3.1
Thermal Shock Resistance, points 12
12

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.1
Chromium (Cr), % 26 to 30
20 to 23
Iron (Fe), % 46.9 to 59.8
36.2 to 45.8
Manganese (Mn), % 0 to 2.0
1.0 to 1.5
Molybdenum (Mo), % 0 to 0.5
2.0 to 3.0
Nickel (Ni), % 14 to 18
31 to 35
Niobium (Nb), % 0
0.25 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.015