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AISI 348 Stainless Steel vs. ASTM A356 Grade 8

Both AISI 348 stainless steel and ASTM A356 grade 8 are iron alloys. They have 71% 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 348 stainless steel and the bottom bar is ASTM A356 grade 8.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 41
21
Fatigue Strength, MPa 200
270
Poisson's Ratio 0.28
0.29
Reduction in Area, % 53
50
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 580
630
Tensile Strength: Yield (Proof), MPa 230
390

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 940
440
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
38
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 19
3.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.7
2.0
Embodied Energy, MJ/kg 54
26
Embodied Water, L/kg 150
55

Common Calculations

PREN (Pitting Resistance) 18
4.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
390
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 4.2
10
Thermal Shock Resistance, points 13
18

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.2
Chromium (Cr), % 17 to 19
1.0 to 1.5
Cobalt (Co), % 0 to 0.2
0
Iron (Fe), % 63.8 to 74
95.4 to 97.4
Manganese (Mn), % 0 to 2.0
0.5 to 0.9
Molybdenum (Mo), % 0
0.9 to 1.2
Nickel (Ni), % 9.0 to 13
0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.75
0.2 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0 to 0.1
0
Vanadium (V), % 0
0.050 to 0.15