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EN 1.4104 Stainless Steel vs. EN 1.4550 Stainless Steel

Both EN 1.4104 stainless steel and EN 1.4550 stainless steel are iron alloys. They have 87% 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 1.4104 stainless steel and the bottom bar is EN 1.4550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 23
42
Fatigue Strength, MPa 230 to 310
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 400 to 450
430
Tensile Strength: Ultimate (UTS), MPa 630 to 750
620
Tensile Strength: Yield (Proof), MPa 350 to 560
230

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 410
480
Maximum Temperature: Mechanical, °C 860
940
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
18
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
3.6
Embodied Energy, MJ/kg 30
51
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 18
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 120
210
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 800
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23 to 27
22
Strength to Weight: Bending, points 21 to 24
21
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 22 to 27
14

Alloy Composition

Carbon (C), % 0.1 to 0.17
0 to 0.080
Chromium (Cr), % 15.5 to 17.5
17 to 19
Iron (Fe), % 78.8 to 84.1
64.9 to 74
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0.2 to 0.6
0
Nickel (Ni), % 0
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0.15 to 0.35
0 to 0.015