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AISI 347 Stainless Steel vs. ASTM Grade HT Steel

Both AISI 347 stainless steel and ASTM grade HT steel are iron alloys. They have 74% 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 AISI 347 stainless steel and the bottom bar is ASTM grade HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 210
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 46
4.6
Fatigue Strength, MPa 220 to 270
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 610 to 690
500
Tensile Strength: Yield (Proof), MPa 240 to 350
270

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 480
400
Maximum Temperature: Mechanical, °C 870
1010
Melting Completion (Liquidus), °C 1430
1390
Melting Onset (Solidus), °C 1400
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
12
Thermal Expansion, µm/m-K 17
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 19
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.6
5.4
Embodied Energy, MJ/kg 52
76
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 18
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 220
19
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 310
180
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22 to 25
18
Strength to Weight: Bending, points 20 to 22
18
Thermal Diffusivity, mm2/s 4.3
3.2
Thermal Shock Resistance, points 13 to 15
12

Alloy Composition

Carbon (C), % 0 to 0.080
0.35 to 0.75
Chromium (Cr), % 17 to 19
15 to 19
Iron (Fe), % 64.1 to 74
38.2 to 51.7
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 9.0 to 13
33 to 37
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040