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S30601 Stainless Steel vs. ASTM A387 Grade 21 Steel

Both S30601 stainless steel and ASTM A387 grade 21 steel are iron alloys. They have 63% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S30601 stainless steel and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 37
21
Fatigue Strength, MPa 250
160 to 250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
74
Shear Strength, MPa 450
310 to 370
Tensile Strength: Ultimate (UTS), MPa 660
500 to 590
Tensile Strength: Yield (Proof), MPa 300
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 370
260
Maximum Temperature: Mechanical, °C 950
480
Melting Completion (Liquidus), °C 1360
1470
Melting Onset (Solidus), °C 1310
1430
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 20
4.1
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 3.9
1.8
Embodied Energy, MJ/kg 55
23
Embodied Water, L/kg 150
62

Common Calculations

PREN (Pitting Resistance) 18
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 230
140 to 320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
18 to 21
Strength to Weight: Bending, points 22
18 to 20
Thermal Shock Resistance, points 16
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.015
0.050 to 0.15
Chromium (Cr), % 17 to 18
2.8 to 3.3
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 56.9 to 60.5
94.4 to 96
Manganese (Mn), % 0.5 to 0.8
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.2
0.9 to 1.1
Nickel (Ni), % 17 to 18
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 5.0 to 5.6
0 to 0.5
Sulfur (S), % 0 to 0.013
0 to 0.025