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S17700 Stainless Steel vs. ASTM Grade HT Steel

Both S17700 stainless steel and ASTM grade HT 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 S17700 stainless steel and the bottom bar is ASTM grade HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 430
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 1.0 to 23
4.6
Fatigue Strength, MPa 290 to 560
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
500
Tensile Strength: Yield (Proof), MPa 430 to 1210
270

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 410
400
Maximum Temperature: Mechanical, °C 890
1010
Melting Completion (Liquidus), °C 1440
1390
Melting Onset (Solidus), °C 1400
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 11
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 13
31
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.8
5.4
Embodied Energy, MJ/kg 40
76
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 17
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
19
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
180
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 42 to 59
18
Strength to Weight: Bending, points 32 to 40
18
Thermal Diffusivity, mm2/s 4.1
3.2
Thermal Shock Resistance, points 39 to 54
12

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0.35 to 0.75
Chromium (Cr), % 16 to 18
15 to 19
Iron (Fe), % 70.5 to 76.8
38.2 to 51.7
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 6.5 to 7.8
33 to 37
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040