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S21603 Stainless Steel vs. ASTM A387 Grade 21L Class 1

Both S21603 stainless steel and ASTM A387 grade 21L class 1 are iron alloys. Both are furnished in the annealed condition. They have 67% 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 S21603 stainless steel and the bottom bar is ASTM A387 grade 21L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
21
Fatigue Strength, MPa 360
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
74
Shear Strength, MPa 490
310
Tensile Strength: Ultimate (UTS), MPa 690
500
Tensile Strength: Yield (Proof), MPa 390
230

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 990
480
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 17
4.1
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.6
1.8
Embodied Energy, MJ/kg 50
23
Embodied Water, L/kg 160
62

Common Calculations

PREN (Pitting Resistance) 34
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
84
Resilience: Unit (Modulus of Resilience), kJ/m3 380
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
18
Strength to Weight: Bending, points 22
18
Thermal Shock Resistance, points 15
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 17.5 to 22
2.8 to 3.3
Iron (Fe), % 57.6 to 67.8
94.4 to 96.1
Manganese (Mn), % 7.5 to 9.0
0.3 to 0.6
Molybdenum (Mo), % 2.0 to 3.0
0.9 to 1.1
Nickel (Ni), % 5.0 to 7.0
0
Nitrogen (N), % 0.25 to 0.5
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 0.75
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025