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S21904 Stainless Steel vs. AISI 301LN Stainless Steel

Both S21904 stainless steel and AISI 301LN stainless steel are iron alloys. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is AISI 301LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
210 to 320
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 51
23 to 51
Fatigue Strength, MPa 380 to 550
270 to 520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 510 to 620
450 to 670
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
630 to 1060
Tensile Strength: Yield (Proof), MPa 390 to 910
270 to 770

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 980
890
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 17
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 15
13
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 43
39
Embodied Water, L/kg 160
130

Common Calculations

PREN (Pitting Resistance) 25
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
220 to 290
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
180 to 1520
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 36
22 to 38
Strength to Weight: Bending, points 23 to 29
21 to 30
Thermal Diffusivity, mm2/s 3.8
4.0
Thermal Shock Resistance, points 15 to 21
14 to 24

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.030
Chromium (Cr), % 19 to 21.5
16 to 18
Iron (Fe), % 59.5 to 67.4
70.7 to 77.9
Manganese (Mn), % 8.0 to 10
0 to 2.0
Nickel (Ni), % 5.5 to 7.5
6.0 to 8.0
Nitrogen (N), % 0.15 to 0.4
0.070 to 0.2
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030

Comparable Variants