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AISI 444 Stainless Steel vs. ASTM Grade HC Steel

Both AISI 444 stainless steel and ASTM grade HC steel are iron alloys. They have 88% 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 AISI 444 stainless steel and the bottom bar is ASTM grade HC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
6.0
Fatigue Strength, MPa 210
96
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 470
430
Tensile Strength: Yield (Proof), MPa 310
200

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 580
460
Maximum Temperature: Mechanical, °C 930
1100
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 23
17
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 15
14
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 3.4
2.8
Embodied Energy, MJ/kg 47
40
Embodied Water, L/kg 130
170

Common Calculations

PREN (Pitting Resistance) 26
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
21
Resilience: Unit (Modulus of Resilience), kJ/m3 240
95
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 17
16
Strength to Weight: Bending, points 17
16
Thermal Diffusivity, mm2/s 6.2
4.5
Thermal Shock Resistance, points 16
14

Alloy Composition

Carbon (C), % 0 to 0.025
0 to 0.5
Chromium (Cr), % 17.5 to 19.5
26 to 30
Iron (Fe), % 73.3 to 80.8
61.9 to 74
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.8 to 2.5
0 to 0.5
Nickel (Ni), % 0 to 1.0
0 to 4.0
Niobium (Nb), % 0.2 to 0.8
0
Nitrogen (N), % 0 to 0.035
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Titanium (Ti), % 0.2 to 0.8
0