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Shipbuilding steel grades and equivalent are specified in the specifications of each classification society in the table below.
| ASTM A131 | Classification Society Standard | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| ABS | BV | CCS | DNV | GL | KR | LR | NK | RINA | |
| A131 A | ABS A | BV A | CCS A | DNV A | GL A | KR A | LR A | NK A | RINA A |
| A131 B | ABS B | BV B | CCS B | DNV B | GL B | KR B | LR B | NK B | RINA B |
| A131 D | ABS D | BV D | CCS D | DNV D | GL D | KR D | LR D | NK D | RINA D |
| A131 E | ABS E | BV E | CCS E | DNV E | GL E | KR E | LR E | NK E | RINA E |
| A131 AH32 | ABS AH32 | BV AH32 | CCS AH32 | DNV AH32 | GL AH32 | KR AH32 | LR AH32 | NK AH32 | RINA AH32 |
| A131 DH32 | ABS DH32 | BV DH32 | CCS DH32 | DNV DH32 | GL DH32 | KR DH32 | LR DH32 | NK DH32 | RINA DH32 |
| A131 EH32 | ABS EH32 | BV EH32 | CCS EH32 | DNV EH32 | GL EH32 | KR EH32 | LR EH32 | NK EH32 | RINA EH32 |
| A131 FH32 | ABS FH32 | BV FH32 | CCS FH32 | DNV FH32 | GL FH32 | KR FH32 | LR FH32 | NK FH32 | RINA FH32 |
| A131 AH36 | ABS AH36 | BV AH36 | CCS AH36 | DNV AH36 | GL AH36 | KR AH36 | LR AH36 | NK AH36 | RINA AH36 |
| A131 DH36 | ABS DH36 | BV DH36 | CCS DH36 | DNV DH36 | GL DH36 | KR DH36 | LR DH36 | NK DH36 | RINA DH36 |
| A131 EH36 | ABS EH36 | BV EH36 | CCS EH36 | DNV EH36 | GL EH36 | KR EH36 | LR EH36 | NK EH36 | RINA EH36 |
| A131 FH36 | ABS FH36 | BV FH36 | CCS FH36 | DNV FH36 | GL FH36 | KR FH36 | LR FH36 | NK FH36 | RINA FH36 |
| A131 AH40 | ABS AH40 | BV AH40 | CCS AH40 | DNV AH40 | GL AH40 | KR AH40 | LR AH40 | NK AH40 | RINA AH40 |
| A131 DH40 | ABS DH40 | BV DH40 | CCS DH40 | DNV DH40 | GL DH40 | KR DH40 | LR DH40 | NK DH40 | RINA DH40 |
| A131 EH40 | ABS EH40 | BV EH40 | CCS EH40 | DNV EH40 | GL EH40 | KR EH40 | LR EH40 | NK EH40 | RINA EH40 |
| A131 FH40 | ABS FH40 | BV FH40 | CCS FH40 | DNV FH40 | GL FH40 | KR FH40 | LR FH40 | NK FH40 | RINA FH40 |
| - | ABS AQ43 | BV AH420 | CCS AH420 | DNV A420 | GL A420 | KR AH43 | LR AH42 | KA43 | RINA A420 |
| - | ABS DQ43 | BV DH420 | CCS DH420 | DNV D420 | GL D420 | KR DH43 | LR DH42 | KD43 | RINA D420 |
| - | ABS EQ43 | BV EH420 | CCS EH420 | DNV E420 | GL E420 | KR EH43 | LR EH42 | KE43 | RINA E420 |
| - | ABS FQ43 | BV FH420 | CCS FH420 | DNV F420 | GL F420 | KR FH43 | LR FH42 | KF43 | RINA F420 |
| - | ABS AQ47 | BV AH460 | CCS AH460 | DNV A460 | GL A460 | KR AH47 | LR AH46 | KA47 | RINA A460 |
| - | ABS DQ47 | BV DH460 | CCS DH460 | DNV D460 | GL D460 | KR DH47 | LR DH46 | KD47 | RINA D460 |
| - | ABS EQ47 | BV EH460 | CCS EH460 | DNV E460 | GL E460 | KR EH47 | LR EH46 | KE47 | RINA E460 |
| - | ABS FQ47 | BV FH460 | CCS FH460 | DNV F460 | GL F460 | KR FH47 | LR FH46 | KF47 | RINA F460 |
from: https://www.lr.org/en
