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EN 1.4742 Stainless Steel vs. AISI 304LN Stainless Steel

Both EN 1.4742 stainless steel and AISI 304LN stainless steel are iron alloys. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4742 stainless steel and the bottom bar is AISI 304LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190 to 350
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
7.8 to 46
Fatigue Strength, MPa 180
200 to 440
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 370
400 to 680
Tensile Strength: Ultimate (UTS), MPa 600
580 to 1160
Tensile Strength: Yield (Proof), MPa 300
230 to 870

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 1000
960
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 19
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
16
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.2
3.1
Embodied Energy, MJ/kg 32
44
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 18
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
83 to 270
Resilience: Unit (Modulus of Resilience), kJ/m3 230
140 to 1900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
21 to 41
Strength to Weight: Bending, points 21
20 to 31
Thermal Diffusivity, mm2/s 5.1
4.0
Thermal Shock Resistance, points 21
13 to 26

Alloy Composition

Aluminum (Al), % 0.7 to 1.2
0
Carbon (C), % 0 to 0.12
0 to 0.030
Chromium (Cr), % 17 to 19
18 to 20
Iron (Fe), % 77.2 to 81.6
65 to 73.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Nickel (Ni), % 0
8.0 to 12
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0.7 to 1.4
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030