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ASTM Grade HT Steel vs. N08031 Stainless Steel

Both ASTM grade HT steel and N08031 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HT steel and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 4.6
45
Fatigue Strength, MPa 130
290
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 500
730
Tensile Strength: Yield (Proof), MPa 270
310

Thermal Properties

Latent Heat of Fusion, J/g 310
310
Maximum Temperature: Corrosion, °C 400
460
Maximum Temperature: Mechanical, °C 1010
1100
Melting Completion (Liquidus), °C 1390
1440
Melting Onset (Solidus), °C 1340
1390
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 15
18

Otherwise Unclassified Properties

Base Metal Price, % relative 31
39
Density, g/cm3 8.0
8.1
Embodied Carbon, kg CO2/kg material 5.4
7.1
Embodied Energy, MJ/kg 76
96
Embodied Water, L/kg 190
240

Common Calculations

PREN (Pitting Resistance) 18
52
Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
270
Resilience: Unit (Modulus of Resilience), kJ/m3 180
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
25
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 3.2
3.1
Thermal Shock Resistance, points 12
14

Alloy Composition

Carbon (C), % 0.35 to 0.75
0 to 0.015
Chromium (Cr), % 15 to 19
26 to 28
Copper (Cu), % 0
1.0 to 1.4
Iron (Fe), % 38.2 to 51.7
29 to 36.9
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
6.0 to 7.0
Nickel (Ni), % 33 to 37
30 to 32
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 2.5
0 to 0.3
Sulfur (S), % 0 to 0.040
0 to 0.010