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SA-203 Grade A, B, D, E, F

Overview

This mid range carbon / manganese grade has a 3.5% nickel content as it’s only alloying element and offers excellent impact resistance for more extreme environments down to -150° F. Most applications for this grade are in pressure vessels, tanks, and components where good ductility and impact resistance in needed for low temperature ranges.

Chemical Requirements

*Elements represented in percentage

Elements Composition %
Grade A Grade B Grade D Grade E and F
Carbon, maxA:
up to 2 in. (50 mm) in thickness 0.17 0.21 0.17 0.20
over 2 to 4 in. (100 mm) incl. in thickness 0.20 0.24 0.20 0.23
 over 4 in. (100 mm) incl. in thickness 0.23 0.25
Manganese, max
Heat analysis:
 2 in. (50 mm) and under over 2 in. (50 mm) 0.70 0.70 0.70 0.70
 and under over 2 in. (50 mm) 0.80 0.80 0.80 0.80
Product analysis:
 2 in. (50 mm) and under 0.78 0.78 0.78 0.78
 over 2 in. (50 mm) 0.88 0.88 0.88 0.88
Phosphorus, max  0.025 0.025 0.025 0.025
Sulfur, max  0.025 0.025 0.025 0.025
Silicon:
Heat analysis 0.15-0.40 0.15-0.40 0.15-0.40 0.15-0.40
Product analysis 0.13-0.45 0.13-0.45 0.13-0.45 0.13-0.45
Nickel:
Heat analysis 2.10-2.50 2.10-2.50 3.25-3.75 3.25-3.75
Product analysis 2.03-2.57 2.03-2.57 3.18-3.82 3.18-3.82

Tensile Requirements

Grade A & D Grade B and E Grade F
ksi [MPa] ksi [MPa] ksi [MPa]
Tensile strength
2 in. (50 mm) & under 65-85 [450-585] 70-90 [485-620] 80-100 [550-690]
over 2 in. (50 mm) 65-85 [450-585] 70-90 [485-620] 75-95 [515-655]
Yield strength, min.
2 in. (50 mm) & under 37 [255] 40 [275] 55 [380]
 over 2 in. (50 mm) 37 [255] 40 [275] 50 [345]
Elongation in 8 in. (200 mm), min, % 19 17
Elongation in 2 in. (50 mm), min, % 23 21 20
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