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EN 1.4958 Stainless Steel vs. EN 1.4539 Stainless Steel

Both EN 1.4958 stainless steel and EN 1.4539 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 92% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4958 stainless steel and the bottom bar is EN 1.4539 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
38
Fatigue Strength, MPa 170
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 430
430
Tensile Strength: Ultimate (UTS), MPa 630
630
Tensile Strength: Yield (Proof), MPa 190
260

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 500
420
Maximum Temperature: Mechanical, °C 1090
1100
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1390
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 15
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 30
31
Density, g/cm3 8.0
8.1
Embodied Carbon, kg CO2/kg material 5.3
5.7
Embodied Energy, MJ/kg 75
78
Embodied Water, L/kg 200
200

Common Calculations

PREN (Pitting Resistance) 21
36
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
190
Resilience: Unit (Modulus of Resilience), kJ/m3 95
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
22
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 3.2
3.2
Thermal Shock Resistance, points 15
14

Alloy Composition

Aluminum (Al), % 0.2 to 0.5
0
Carbon (C), % 0.030 to 0.080
0 to 0.020
Chromium (Cr), % 19 to 22
19 to 21
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
1.2 to 2.0
Iron (Fe), % 41.1 to 50.6
43.1 to 51.8
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 30 to 32.5
24 to 26
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.030
0 to 0.15
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.7
0 to 0.7
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0.2 to 0.5
0