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AISI 321H Stainless Steel vs. ACI-ASTM CK3MCuN Steel

Both AISI 321H stainless steel and ACI-ASTM CK3MCuN steel are iron alloys. They have 82% of their average alloy composition in common. There are 32 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 321H stainless steel and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
39
Fatigue Strength, MPa 200
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 580
620
Tensile Strength: Yield (Proof), MPa 230
290

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 480
420
Maximum Temperature: Mechanical, °C 940
1090
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 16
29
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.2
5.6
Embodied Energy, MJ/kg 46
76
Embodied Water, L/kg 140
190

Common Calculations

PREN (Pitting Resistance) 18
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
200
Resilience: Unit (Modulus of Resilience), kJ/m3 140
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
21
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 4.0
3.2
Thermal Shock Resistance, points 12
14

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.025
Chromium (Cr), % 17 to 19
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 65.4 to 74
49.5 to 56.3
Manganese (Mn), % 0 to 2.0
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 9.0 to 12
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0 to 0.7
0