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S39274 Stainless Steel vs. ASTM A387 Grade 21L Class 1

Both S39274 stainless steel and ASTM A387 grade 21L class 1 are iron alloys. Both are furnished in the annealed condition. They have 66% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S39274 stainless steel and the bottom bar is ASTM A387 grade 21L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
150
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 17
21
Fatigue Strength, MPa 380
160
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
74
Shear Strength, MPa 560
310
Tensile Strength: Ultimate (UTS), MPa 900
500
Tensile Strength: Yield (Proof), MPa 620
230

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Maximum Temperature: Mechanical, °C 1100
480
Melting Completion (Liquidus), °C 1480
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 24
4.1
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 4.3
1.8
Embodied Energy, MJ/kg 60
23
Embodied Water, L/kg 180
62

Common Calculations

PREN (Pitting Resistance) 43
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
84
Resilience: Unit (Modulus of Resilience), kJ/m3 940
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32
18
Strength to Weight: Bending, points 26
18
Thermal Diffusivity, mm2/s 4.2
11
Thermal Shock Resistance, points 25
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 24 to 26
2.8 to 3.3
Copper (Cu), % 0.2 to 0.8
0
Iron (Fe), % 57 to 65.6
94.4 to 96.1
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 2.5 to 3.5
0.9 to 1.1
Nickel (Ni), % 6.0 to 8.0
0
Nitrogen (N), % 0.24 to 0.32
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.8
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.025
Tungsten (W), % 1.5 to 2.5
0