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AISI 348 Stainless Steel vs. AISI 442 Stainless Steel

Both AISI 348 stainless steel and AISI 442 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 88% 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 348 stainless steel and the bottom bar is AISI 442 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 41
23
Fatigue Strength, MPa 200
210
Poisson's Ratio 0.28
0.27
Rockwell B Hardness 81
83
Shear Modulus, GPa 77
78
Shear Strength, MPa 400
370
Tensile Strength: Ultimate (UTS), MPa 580
580
Tensile Strength: Yield (Proof), MPa 230
310

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 480
420
Maximum Temperature: Mechanical, °C 940
960
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
22
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 19
10
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.7
2.3
Embodied Energy, MJ/kg 54
32
Embodied Water, L/kg 150
130

Common Calculations

PREN (Pitting Resistance) 18
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
21
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 4.2
5.8
Thermal Shock Resistance, points 13
20

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.2
Chromium (Cr), % 17 to 19
18 to 23
Cobalt (Co), % 0 to 0.2
0
Iron (Fe), % 63.8 to 74
74.1 to 82
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 9.0 to 13
0 to 0.6
Niobium (Nb), % 0 to 1.0
0
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