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ASTM Grade HC Steel vs. AISI 445 Stainless Steel

Both ASTM grade HC steel and AISI 445 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HC steel and the bottom bar is AISI 445 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 6.0
25
Fatigue Strength, MPa 96
160
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 430
480
Tensile Strength: Yield (Proof), MPa 200
230

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 460
480
Maximum Temperature: Mechanical, °C 1100
950
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1370
1390
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
21
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 14
12
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.6
Embodied Energy, MJ/kg 40
38
Embodied Water, L/kg 170
130

Common Calculations

PREN (Pitting Resistance) 29
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
98
Resilience: Unit (Modulus of Resilience), kJ/m3 95
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 16
17
Strength to Weight: Bending, points 16
18
Thermal Diffusivity, mm2/s 4.5
5.6
Thermal Shock Resistance, points 14
16

Alloy Composition

Carbon (C), % 0 to 0.5
0 to 0.020
Chromium (Cr), % 26 to 30
19 to 21
Copper (Cu), % 0
0.3 to 0.6
Iron (Fe), % 61.9 to 74
74.9 to 80.7
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
0 to 0.6
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.012