MakeItFrom.com
Menu (ESC)

AISI 304N Stainless Steel vs. S81921 Stainless Steel

Both AISI 304N stainless steel and S81921 stainless steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 33 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 AISI 304N stainless steel and the bottom bar is S81921 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 360
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.1 to 45
29
Fatigue Strength, MPa 220 to 440
370
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 420 to 700
460
Tensile Strength: Ultimate (UTS), MPa 620 to 1180
710
Tensile Strength: Yield (Proof), MPa 270 to 850
500

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 420
430
Maximum Temperature: Mechanical, °C 960
990
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 15
14
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.0
2.9
Embodied Energy, MJ/kg 43
41
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 21
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 280
180
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 1830
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 42
25
Strength to Weight: Bending, points 21 to 32
23
Thermal Diffusivity, mm2/s 4.2
4.0
Thermal Shock Resistance, points 14 to 26
20

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 20
19 to 22
Iron (Fe), % 66.4 to 73.9
66.7 to 75.9
Manganese (Mn), % 0 to 2.0
2.0 to 4.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 8.0 to 10.5
2.0 to 4.0
Nitrogen (N), % 0.1 to 0.16
0.14 to 0.2
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030