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ASTM Grade HT Steel vs. AISI 446 Stainless Steel

Both ASTM grade HT steel and AISI 446 stainless steel are iron alloys. They have 64% of their average alloy composition in common. There are 32 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 AISI 446 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 4.6
23
Fatigue Strength, MPa 130
200
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
79
Tensile Strength: Ultimate (UTS), MPa 500
570
Tensile Strength: Yield (Proof), MPa 270
300

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 400
440
Maximum Temperature: Mechanical, °C 1010
1180
Melting Completion (Liquidus), °C 1390
1510
Melting Onset (Solidus), °C 1340
1430
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 12
17
Thermal Expansion, µm/m-K 15
11

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 31
12
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.4
2.4
Embodied Energy, MJ/kg 76
35
Embodied Water, L/kg 190
150

Common Calculations

PREN (Pitting Resistance) 18
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
110
Resilience: Unit (Modulus of Resilience), kJ/m3 180
230
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 18
21
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 3.2
4.6
Thermal Shock Resistance, points 12
19

Alloy Composition

Carbon (C), % 0.35 to 0.75
0 to 0.2
Chromium (Cr), % 15 to 19
23 to 27
Iron (Fe), % 38.2 to 51.7
69.2 to 77
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 33 to 37
0 to 0.75
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030