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EN 1.4959 Stainless Steel vs. SAE-AISI T4 Steel

Both EN 1.4959 stainless steel and SAE-AISI T4 steel are iron alloys. They have 50% 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 EN 1.4959 stainless steel and the bottom bar is SAE-AISI T4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 630
800 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1400
1810
Melting Onset (Solidus), °C 1350
1750
Specific Heat Capacity, J/kg-K 480
410
Thermal Conductivity, W/m-K 12
21
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 31
55
Density, g/cm3 8.0
9.4
Embodied Carbon, kg CO2/kg material 5.4
8.5
Embodied Energy, MJ/kg 76
130
Embodied Water, L/kg 200
120

Common Calculations

PREN (Pitting Resistance) 21
37
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 22
24 to 64
Strength to Weight: Bending, points 20
20 to 39
Thermal Diffusivity, mm2/s 3.2
5.4
Thermal Shock Resistance, points 15
24 to 64

Alloy Composition

Aluminum (Al), % 0.25 to 0.65
0
Carbon (C), % 0.050 to 0.1
0.7 to 0.8
Chromium (Cr), % 19 to 22
3.8 to 4.5
Cobalt (Co), % 0 to 0.5
4.3 to 5.8
Copper (Cu), % 0 to 0.5
0 to 0.25
Iron (Fe), % 39.4 to 50.5
66.3 to 72.3
Manganese (Mn), % 0 to 1.5
0.1 to 0.4
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 30 to 34
0 to 0.3
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.7
0.2 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.25 to 0.65
0
Tungsten (W), % 0
17.5 to 19
Vanadium (V), % 0
0.8 to 1.2