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S21640 Stainless Steel vs. S45000 Stainless Steel

Both S21640 stainless steel and S45000 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S21640 stainless steel and the bottom bar is S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
280 to 410
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 46
6.8 to 14
Fatigue Strength, MPa 320
330 to 650
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Shear Strength, MPa 520
590 to 830
Tensile Strength: Ultimate (UTS), MPa 740
980 to 1410
Tensile Strength: Yield (Proof), MPa 350
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 490
400
Maximum Temperature: Mechanical, °C 940
840
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
13
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.6
2.8
Embodied Energy, MJ/kg 51
39
Embodied Water, L/kg 150
130

Common Calculations

PREN (Pitting Resistance) 26
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 300
850 to 4400
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
35 to 50
Strength to Weight: Bending, points 23
28 to 36
Thermal Diffusivity, mm2/s 4.0
4.5
Thermal Shock Resistance, points 16
33 to 47

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.050
Chromium (Cr), % 17.5 to 19.5
14 to 16
Copper (Cu), % 0
1.3 to 1.8
Iron (Fe), % 63 to 74.3
72.1 to 79.3
Manganese (Mn), % 3.5 to 6.5
0 to 1.0
Molybdenum (Mo), % 0.5 to 2.0
0.5 to 1.0
Nickel (Ni), % 4.0 to 6.5
5.0 to 7.0
Niobium (Nb), % 0.1 to 1.0
0
Nitrogen (N), % 0.080 to 0.3
0
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030