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S44800 Stainless Steel vs. ASTM Grade HP Steel

Both S44800 stainless steel and ASTM grade HP steel are iron alloys. They have 65% of their average alloy composition in common. There are 30 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 S44800 stainless steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
5.1
Fatigue Strength, MPa 300
130
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 82
78
Tensile Strength: Ultimate (UTS), MPa 590
490
Tensile Strength: Yield (Proof), MPa 450
260

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Corrosion, °C 460
440
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1460
1370
Melting Onset (Solidus), °C 1410
1330
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
12
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 19
34
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.8
5.8
Embodied Energy, MJ/kg 52
82
Embodied Water, L/kg 190
220

Common Calculations

PREN (Pitting Resistance) 42
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
21
Resilience: Unit (Modulus of Resilience), kJ/m3 480
170
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
17
Strength to Weight: Bending, points 20
17
Thermal Diffusivity, mm2/s 4.6
3.2
Thermal Shock Resistance, points 19
11

Alloy Composition

Carbon (C), % 0 to 0.010
0.35 to 0.75
Chromium (Cr), % 28 to 30
24 to 28
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 62.6 to 66.5
29.2 to 42.7
Manganese (Mn), % 0 to 0.3
0 to 2.0
Molybdenum (Mo), % 3.5 to 4.2
0 to 0.5
Nickel (Ni), % 2.0 to 2.5
33 to 37
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 2.5
Sulfur (S), % 0 to 0.020
0 to 0.040