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ASTM A372 Grade K Steel vs. S21460 Stainless Steel

Both ASTM A372 grade K steel and S21460 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 28 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 ASTM A372 grade K steel and the bottom bar is S21460 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 23
46
Fatigue Strength, MPa 440
390
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 490
580
Tensile Strength: Ultimate (UTS), MPa 780
830
Tensile Strength: Yield (Proof), MPa 620
430

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 440
920
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1420
1330
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
18

Otherwise Unclassified Properties

Base Metal Price, % relative 4.4
14
Density, g/cm3 7.9
7.6
Embodied Carbon, kg CO2/kg material 1.8
3.0
Embodied Energy, MJ/kg 24
43
Embodied Water, L/kg 57
160

Common Calculations

PREN (Pitting Resistance) 2.7
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
320
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
460
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27
30
Strength to Weight: Bending, points 24
26
Thermal Shock Resistance, points 23
17

Alloy Composition

Carbon (C), % 0 to 0.18
0 to 0.12
Chromium (Cr), % 1.0 to 1.8
17 to 19
Iron (Fe), % 93.4 to 96.6
57.3 to 63.7
Manganese (Mn), % 0.1 to 0.4
14 to 16
Molybdenum (Mo), % 0.2 to 0.6
0
Nickel (Ni), % 2.0 to 3.3
5.0 to 6.0
Nitrogen (N), % 0
0.35 to 0.5
Phosphorus (P), % 0 to 0.015
0 to 0.060
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030