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S17700 Stainless Steel vs. ASTM Grade HP Steel

Both S17700 stainless steel and ASTM grade HP steel are iron alloys. They have 61% of their average alloy composition in common. There are 30 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 S17700 stainless steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 430
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 1.0 to 23
5.1
Fatigue Strength, MPa 290 to 560
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
490
Tensile Strength: Yield (Proof), MPa 430 to 1210
260

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 890
1100
Melting Completion (Liquidus), °C 1440
1370
Melting Onset (Solidus), °C 1400
1330
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 13
34
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.8
5.8
Embodied Energy, MJ/kg 40
82
Embodied Water, L/kg 150
220

Common Calculations

PREN (Pitting Resistance) 17
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
21
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 42 to 59
17
Strength to Weight: Bending, points 32 to 40
17
Thermal Diffusivity, mm2/s 4.1
3.2
Thermal Shock Resistance, points 39 to 54
11

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
24 to 28
Iron (Fe), % 70.5 to 76.8
29.2 to 42.7
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