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ASTM Grade HT Steel vs. S32803 Stainless Steel

Both ASTM grade HT steel and S32803 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 32 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 HT steel and the bottom bar is S32803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
210
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 4.6
18
Fatigue Strength, MPa 130
350
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 500
680
Tensile Strength: Yield (Proof), MPa 270
560

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 400
510
Maximum Temperature: Mechanical, °C 1010
1100
Melting Completion (Liquidus), °C 1390
1450
Melting Onset (Solidus), °C 1340
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
16
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 31
19
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.4
3.7
Embodied Energy, MJ/kg 76
53
Embodied Water, L/kg 190
180

Common Calculations

PREN (Pitting Resistance) 18
36
Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
120
Resilience: Unit (Modulus of Resilience), kJ/m3 180
760
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
25
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 3.2
4.4
Thermal Shock Resistance, points 12
22

Alloy Composition

Carbon (C), % 0.35 to 0.75
0 to 0.015
Chromium (Cr), % 15 to 19
28 to 29
Iron (Fe), % 38.2 to 51.7
62.9 to 67.1
Manganese (Mn), % 0 to 2.0
0 to 0.5
Molybdenum (Mo), % 0 to 0.5
1.8 to 2.5
Nickel (Ni), % 33 to 37
3.0 to 4.0
Niobium (Nb), % 0
0.15 to 0.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 2.5
0 to 0.55
Sulfur (S), % 0 to 0.040
0 to 0.0035