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ASTM Grade HP Steel vs. N08800 Stainless Steel

Both ASTM grade HP steel and N08800 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HP steel and the bottom bar is N08800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 5.1
4.5 to 34
Fatigue Strength, MPa 130
150 to 390
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 490
500 to 1000
Tensile Strength: Yield (Proof), MPa 260
190 to 830

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Maximum Temperature: Corrosion, °C 440
490
Maximum Temperature: Mechanical, °C 1100
1100
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
14

Otherwise Unclassified Properties

Base Metal Price, % relative 34
30
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 5.8
5.3
Embodied Energy, MJ/kg 82
76
Embodied Water, L/kg 220
200

Common Calculations

PREN (Pitting Resistance) 27
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
42 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 170
96 to 1740
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
18 to 35
Strength to Weight: Bending, points 17
18 to 28
Thermal Diffusivity, mm2/s 3.2
3.0
Thermal Shock Resistance, points 11
13 to 25

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.35 to 0.75
0 to 0.1
Chromium (Cr), % 24 to 28
19 to 23
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 29.2 to 42.7
39.5 to 50.7
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 33 to 37
30 to 35
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 2.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6