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SAE-AISI A7 Steel vs. EN 1.4958 Stainless Steel

Both SAE-AISI A7 steel and EN 1.4958 stainless steel are iron alloys. They have 52% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is EN 1.4958 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
630

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1470
1400
Melting Onset (Solidus), °C 1430
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 37
12
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 10
30
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 13
5.3
Embodied Energy, MJ/kg 200
75
Embodied Water, L/kg 100
200

Common Calculations

PREN (Pitting Resistance) 11
21
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29 to 77
22
Strength to Weight: Bending, points 25 to 48
20
Thermal Diffusivity, mm2/s 10
3.2
Thermal Shock Resistance, points 27 to 72
15

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.5
Carbon (C), % 2.0 to 2.9
0.030 to 0.080
Chromium (Cr), % 5.0 to 5.8
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0 to 0.25
0 to 0.5
Iron (Fe), % 81.4 to 87.7
41.1 to 50.6
Manganese (Mn), % 0 to 0.8
0 to 1.5
Molybdenum (Mo), % 0.9 to 1.4
0
Nickel (Ni), % 0 to 0.3
30 to 32.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.7
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.2 to 0.5
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0