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S21800 Stainless Steel vs. S30600 Stainless Steel

Both S21800 stainless steel and S30600 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 93% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is S30600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 40
45
Fatigue Strength, MPa 330
250
Poisson's Ratio 0.28
0.28
Reduction in Area, % 62
56
Shear Modulus, GPa 75
76
Shear Strength, MPa 510
430
Tensile Strength: Ultimate (UTS), MPa 740
610
Tensile Strength: Yield (Proof), MPa 390
270

Thermal Properties

Latent Heat of Fusion, J/g 340
350
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 900
950
Melting Completion (Liquidus), °C 1360
1380
Melting Onset (Solidus), °C 1310
1330
Specific Heat Capacity, J/kg-K 500
490
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 15
19
Density, g/cm3 7.5
7.6
Embodied Carbon, kg CO2/kg material 3.1
3.6
Embodied Energy, MJ/kg 45
51
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
220
Resilience: Unit (Modulus of Resilience), kJ/m3 390
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
22
Strength to Weight: Bending, points 24
21
Thermal Shock Resistance, points 17
14

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.018
Chromium (Cr), % 16 to 18
17 to 18.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 59.1 to 65.4
58.9 to 65.3
Manganese (Mn), % 7.0 to 9.0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 8.0 to 9.0
14 to 15.5
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.020
Silicon (Si), % 3.5 to 4.5
3.7 to 4.3
Sulfur (S), % 0 to 0.030
0 to 0.020