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AISI 409 Stainless Steel vs. ASTM Grade HP Steel

Both AISI 409 stainless steel and ASTM grade HP steel are iron alloys. They have 48% 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 AISI 409 stainless steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 24
5.1
Fatigue Strength, MPa 140
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 420
490
Tensile Strength: Yield (Proof), MPa 200
260

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Maximum Temperature: Corrosion, °C 450
440
Maximum Temperature: Mechanical, °C 710
1100
Melting Completion (Liquidus), °C 1450
1370
Melting Onset (Solidus), °C 1400
1330
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
12
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
34
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.0
5.8
Embodied Energy, MJ/kg 28
82
Embodied Water, L/kg 94
220

Common Calculations

PREN (Pitting Resistance) 11
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
21
Resilience: Unit (Modulus of Resilience), kJ/m3 100
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
17
Strength to Weight: Bending, points 16
17
Thermal Diffusivity, mm2/s 6.7
3.2
Thermal Shock Resistance, points 15
11

Alloy Composition

Carbon (C), % 0 to 0.080
0.35 to 0.75
Chromium (Cr), % 10.5 to 11.7
24 to 28
Iron (Fe), % 84.9 to 89.5
29.2 to 42.7
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.5
33 to 37
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Titanium (Ti), % 0 to 0.75
0