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ASTM Grade HP Steel vs. N08801 Stainless Steel

Both ASTM grade HP steel and N08801 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 29 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 HP steel and the bottom bar is N08801 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 5.1
34
Fatigue Strength, MPa 130
260
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 490
860
Tensile Strength: Yield (Proof), MPa 260
190

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Maximum Temperature: Corrosion, °C 440
630
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1370
1390
Melting Onset (Solidus), °C 1330
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 34
30
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 5.8
5.5
Embodied Energy, MJ/kg 82
79
Embodied Water, L/kg 220
200

Common Calculations

PREN (Pitting Resistance) 27
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
220
Resilience: Unit (Modulus of Resilience), kJ/m3 170
92
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
30
Strength to Weight: Bending, points 17
25
Thermal Diffusivity, mm2/s 3.2
3.3
Thermal Shock Resistance, points 11
20

Alloy Composition

Carbon (C), % 0.35 to 0.75
0 to 0.1
Chromium (Cr), % 24 to 28
19 to 22
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 29.2 to 42.7
39.5 to 50.3
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 33 to 37
30 to 34
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
0.75 to 1.5