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EN 1.4109 Stainless Steel vs. EN 1.4958 Stainless Steel

Both EN 1.4109 stainless steel and EN 1.4958 stainless steel are iron alloys. They have 62% of their average alloy composition in common. There are 32 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 EN 1.4109 stainless steel and the bottom bar is EN 1.4958 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19
40
Fatigue Strength, MPa 270
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 480
430
Tensile Strength: Ultimate (UTS), MPa 770
630
Tensile Strength: Yield (Proof), MPa 420
190

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
500
Maximum Temperature: Mechanical, °C 820
1090
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
12
Thermal Expansion, µm/m-K 10
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
30
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.2
5.3
Embodied Energy, MJ/kg 30
75
Embodied Water, L/kg 110
200

Common Calculations

PREN (Pitting Resistance) 17
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
190
Resilience: Unit (Modulus of Resilience), kJ/m3 460
95
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
22
Strength to Weight: Bending, points 24
20
Thermal Diffusivity, mm2/s 8.1
3.2
Thermal Shock Resistance, points 28
15

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.5
Carbon (C), % 0.6 to 0.75
0.030 to 0.080
Chromium (Cr), % 14 to 16
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 80.7 to 85
41.1 to 50.6
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0.4 to 0.8
0
Nickel (Ni), % 0
30 to 32.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 0.7
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0.2 to 0.5