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AISI 348H Stainless Steel vs. ACI-ASTM CD6MN Steel

Both AISI 348H stainless steel and ACI-ASTM CD6MN steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 31 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 348H stainless steel and the bottom bar is ACI-ASTM CD6MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
28
Fatigue Strength, MPa 200
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 580
730
Tensile Strength: Yield (Proof), MPa 230
510

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 500
450
Maximum Temperature: Mechanical, °C 940
1100
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 20
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.9
3.4
Embodied Energy, MJ/kg 56
48
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 18
36
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
180
Resilience: Unit (Modulus of Resilience), kJ/m3 140
650
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
26
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 4.1
4.4
Thermal Shock Resistance, points 13
20

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.060
Chromium (Cr), % 17 to 19
24 to 27
Cobalt (Co), % 0 to 0.2
0
Iron (Fe), % 63.8 to 73.6
62.1 to 70.1
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 9.0 to 13
4.0 to 6.0
Niobium (Nb), % 0.32 to 1.0
0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tantalum (Ta), % 0 to 0.1
0