MakeItFrom.com
Menu (ESC)

S21800 Stainless Steel vs. R30556 Alloy

Both S21800 stainless steel and R30556 alloy are iron alloys. Both are furnished in the annealed condition. They have 57% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is R30556 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 40
45
Fatigue Strength, MPa 330
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
81
Shear Strength, MPa 510
550
Tensile Strength: Ultimate (UTS), MPa 740
780
Tensile Strength: Yield (Proof), MPa 390
350

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1360
1420
Melting Onset (Solidus), °C 1310
1330
Specific Heat Capacity, J/kg-K 500
450
Thermal Expansion, µm/m-K 16
15

Otherwise Unclassified Properties

Base Metal Price, % relative 15
70
Density, g/cm3 7.5
8.4
Embodied Carbon, kg CO2/kg material 3.1
8.7
Embodied Energy, MJ/kg 45
130
Embodied Water, L/kg 150
300

Common Calculations

PREN (Pitting Resistance) 19
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
290
Resilience: Unit (Modulus of Resilience), kJ/m3 390
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
23
Strength to Weight: Axial, points 27
26
Strength to Weight: Bending, points 24
22
Thermal Shock Resistance, points 17
18

Alloy Composition

Aluminum (Al), % 0
0.1 to 0.5
Boron (B), % 0
0 to 0.020
Carbon (C), % 0 to 0.1
0.050 to 0.15
Chromium (Cr), % 16 to 18
21 to 23
Cobalt (Co), % 0
16 to 21
Iron (Fe), % 59.1 to 65.4
20.4 to 38.2
Lanthanum (La), % 0
0.0050 to 0.1
Manganese (Mn), % 7.0 to 9.0
0.5 to 2.0
Molybdenum (Mo), % 0
2.5 to 4.0
Nickel (Ni), % 8.0 to 9.0
19 to 22.5
Niobium (Nb), % 0
0 to 0.3
Nitrogen (N), % 0.080 to 0.18
0.1 to 0.3
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 3.5 to 4.5
0.2 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 0
0.3 to 1.3
Tungsten (W), % 0
2.0 to 3.5
Zinc (Zn), % 0
0.0010 to 0.1