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ASTM Grade HF Steel vs. AISI 409 Stainless Steel

Both ASTM grade HF steel and AISI 409 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HF steel and the bottom bar is AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
24
Fatigue Strength, MPa 200
140
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 550
420
Tensile Strength: Yield (Proof), MPa 270
200

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 1000
710
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
6.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.2
2.0
Embodied Energy, MJ/kg 46
28
Embodied Water, L/kg 150
94

Common Calculations

PREN (Pitting Resistance) 21
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
83
Resilience: Unit (Modulus of Resilience), kJ/m3 180
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
15
Strength to Weight: Bending, points 19
16
Thermal Diffusivity, mm2/s 4.2
6.7
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.080
Chromium (Cr), % 18 to 23
10.5 to 11.7
Iron (Fe), % 60 to 73.8
84.9 to 89.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 8.0 to 12
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030
Titanium (Ti), % 0
0 to 0.75