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AISI 348H Stainless Steel vs. N08904 Stainless Steel

Both AISI 348H stainless steel and N08904 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 76% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 348H stainless steel and the bottom bar is N08904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
38
Fatigue Strength, MPa 200
200
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 79
77
Shear Modulus, GPa 77
79
Shear Strength, MPa 400
370
Tensile Strength: Ultimate (UTS), MPa 580
540
Tensile Strength: Yield (Proof), MPa 230
240

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 500
430
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
470
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 20
32
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 3.9
5.8
Embodied Energy, MJ/kg 56
79
Embodied Water, L/kg 150
200

Common Calculations

PREN (Pitting Resistance) 18
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
170
Resilience: Unit (Modulus of Resilience), kJ/m3 140
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
19
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 4.1
3.1
Thermal Shock Resistance, points 13
12

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.020
Chromium (Cr), % 17 to 19
19 to 23
Cobalt (Co), % 0 to 0.2
0
Copper (Cu), % 0
1.0 to 2.0
Iron (Fe), % 63.8 to 73.6
38.8 to 53
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 9.0 to 13
23 to 28
Niobium (Nb), % 0.32 to 1.0
0
Nitrogen (N), % 0
0 to 0.1
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 0.035
Tantalum (Ta), % 0 to 0.1
0