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.
*Elements represented in percentage
Elements | Composition % | |||
---|---|---|---|---|
SA 203 Grade A |
SA 203 Grade B |
SA 203 Grade D |
SA 203 Grade E and F |
|
Carbon, max: | ||||
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 |
SA 203 Grade A & D |
SA 203 Grade B and E |
SA 203 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 |