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ASTM Grade HT Steel vs. S39277 Stainless Steel

Both ASTM grade HT steel and S39277 stainless steel are iron alloys. They have 70% 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 S39277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 4.6
28
Fatigue Strength, MPa 130
480
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 500
930
Tensile Strength: Yield (Proof), MPa 270
660

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 400
450
Maximum Temperature: Mechanical, °C 1010
1100
Melting Completion (Liquidus), °C 1390
1460
Melting Onset (Solidus), °C 1340
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 12
16
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 31
23
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 5.4
4.2
Embodied Energy, MJ/kg 76
59
Embodied Water, L/kg 190
180

Common Calculations

PREN (Pitting Resistance) 18
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
240
Resilience: Unit (Modulus of Resilience), kJ/m3 180
1070
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
33
Strength to Weight: Bending, points 18
27
Thermal Diffusivity, mm2/s 3.2
4.2
Thermal Shock Resistance, points 12
26

Alloy Composition

Carbon (C), % 0.35 to 0.75
0 to 0.025
Chromium (Cr), % 15 to 19
24 to 26
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 38.2 to 51.7
56.8 to 64.3
Manganese (Mn), % 0 to 2.0
0 to 0.8
Molybdenum (Mo), % 0 to 0.5
3.0 to 4.0
Nickel (Ni), % 33 to 37
6.5 to 8.0
Nitrogen (N), % 0
0.23 to 0.33
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 2.5
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.0020
Tungsten (W), % 0
0.8 to 1.2