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Contact Supplier| ASTM | Grade | C max | Mn max | P max | S max | Si max | Ni | Cr | Mo | |||||||||||||
| A387 | Class 1 | 5 | 0.15 | 0.30-0.60 | 0.04 | 0.03 | 0.5 | 4.00-6.00 | 0-45-0.65 | |||||||||||||
| Class 2 | 9 | 0.15 | 0.30-3.60 | 0.03 | 0.3 | 1 | 8.00-10.0 | 0.90-1.10 | ||||||||||||||
| 11 | 0.04-0.17 | 0.40-0.65 | 0.04 | 0.04 | 0.50-0.80 | 1.00-1.50 | 0-45-0.65 | |||||||||||||||
| 12 | 0.04-0.17 | 0.40-0.65 | 0.04 | 0.04 | o_ 15-0.40 | 0.80-1.15 | 0.45-0.60 | |||||||||||||||
| 22 | 0.05-0.17 | 0.30-0.60 | 0.04 | 0.035 | 0.5 | 2 .00-2 .50 | 0.90-1.10 | |||||||||||||||
| Mechenical Requirement | Hardness | |||||||
| ASTM | Grade | Tensil Strenght Apa (Ksi) Min. | Yeild Strenght Apa (Ksi) Min. | Elogation Min% | Brinel Max HB | Rockwell Max HRB | ||
| A387 | ||||||||
| Class -1 | Class – 2 | Class -1 | Class – 2 | |||||
| Class-1 | 5 | 415-585 | 515-690 | 205 | 310 | 18 | 202 | 92 |
| Class-2 | 9 | 415-585 | 515-690 | 205 | 310 | 18 | 217 | 95 |
| 11 | 415-585 | 515-690 | 240 | 310 | 22 | 217 | 95 | |
| 12 | 380-550 | 450-585 | 230 | 275 | 22 | 217 | 95 | |
| 22 | 415-585 | 515-690 | 205 | 310 | 18 | 201 | 92 | |