ASTM A387 steel specification refers to 6 grades of alloy steel plates for high temperature applications, categorized by chromium and molybdenum content, grade 11 and grade 12 have similar chemical compositions and can be used for welded pressure vessels and industrial boilers, mainly used in the oil and gas and petrochemical industries, generally used for the transportation of high temperature mediums. grade 5 and grade 9 plates have alloying elements of chromium and molybdenum with good corrosion and heat resistance, which is exactly what the sour oil and gas industry needs. GNEE Group offers a wide range of ASTM A387 steel plates in a wide range of sizes for pressure vessel manufacturers and the oil and gas industry. if you are interested in ASTM A387 steel plates or other pressure vessel steel products, please contact us today for the latest prices!
ASTM A387 pressure vessel plate Chemical Composition:
| ASTM A387 | Grade 5 | Grade 9 | Grade 11 | Grade 12 | Grade 22 |
|---|---|---|---|---|---|
| Carbon | 0.15 max | 0.15 max | 0.04 - 0.17 | 0.04 - 0.17 | 0.04 - 0.15 |
| Manganese | 0.25 - 0.66 | 0.25 - 0.66 | 0.35 - 0.73 | 0.35 - 0.73 | 0.25 - 0.66 |
| Phosphorous | 0.035 | 0.030 | 0.035 | 0.035 | 0.035 |
| Sulfur | 0.030 | 0.030 | 0.035 | 0.035 | 0.035 |
| Silicon | 0.55 max | 1.05 max | 0.44 - 0.86 | 0.13 - 0.45 | 0.5 max |
| Chromium | 3.9 - 6.1 | 7.9 - 10.1 | 0.94 - 1.56 | 0.74 - 1.21 | 1.88 - 2.62 |
| Molybdenum | 0.40 - 0.7 | 0.85 - 1.15 | 0.40 - 0.7 | 0.4 - 0.65 | 0.85 - 1.15 |
ASTM A387 pressure vessel steel plate Mechanical Property:
| ASTM A387 Mechanical Property | A 387 Grade 5 | A 387 Grade 9 | A 387 Grade 11 | A 387 Grade 12 | A 387 Grade 22 | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Class1 | Class2 | Class1 | Class2 | Class1 | Class2 | Class1 | Class2 | Class1 | Class2 | |
| Tensile strength(ksi) |
60-85 |
75-100 |
60-85 |
75-100 |
60-85 |
70-90 |
50-80 |
65-85 |
60-85 |
75-100 |
| Tensile strength(Mpa) |
415-585 |
515-690 |
415-585 |
515-690 |
415-585 |
485-620 |
380-550 |
450-585 |
415-585 |
515-690 |
| Yield Strength(ksi) |
30 |
45 |
30 |
45 |
35 |
45 |
33 |
40 |
30 |
45 |
| Tensile Strength(Mpa) |
205 |
310 |
205 |
310 |
240 |
310 |
230 |
275 |
205 |
310 |
| Elongation in 200mm(%) | 19 | 18 | 18 | 19 | ||||||
| Elongation in 50mm(%) | 18 | 18 | 18 | 18 | 22 | 22 | 22 | 22 | 18 | 18 |
| Reduction of area in % | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 |
