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DN | OD | ASTM A53 GRA / B | BS1387 EN10255 | ||||||||
Outside Diameter | SCH10S | STD SCH40 | LIGHT | MEDIUM | HEAVY | ||||||
MM | INCH | MM | (mm) | (mm) | (mm) | (mm) | (mm) | ||||
15 | 1/2” | 21.3 | 2.11 | 2.77 | 2 | 2.6 | - | ||||
20 | 3/4” | 26.7 | 2.11 | 2.87 | 2.3 | 2.6 | 3.2 | ||||
25 | 1” | 33.4 | 2.77 | 3.38 | 2.6 | 3.2 | 4 | ||||
32 | 1-1/4” | 42.2 | 2.77 | 3.56 | 2.6 | 3.2 | 4 | ||||
40 | 1-1/2” | 48.3 | 2.77 | 3.68 | 2.9 | 3.2 | 4 | ||||
50 | 2” | 60.3 | 2.77 | 3.91 | 2.9 | 3.6 | 4.5 | ||||
65 | 2-1/2” | 73 | 3.05 | 5.16 | 3.2 | 3.6 | 4.5 | ||||
80 | 3” | 88.9 | 3.05 | 5.49 | 3.2 | 4 | 5 | ||||
100 | 4” | 114.3 | 3.05 | 6.02 | 3.6 | 4.5 | 5.4 | ||||
125 | 5” | 141.3 | 3.4 | 6.55 | - | 5 | 5.4 | ||||
150 | 6” | 168.3 | 3.4 | 7.11 | - | 5 | 5.4 | ||||
200 | 8” | 219.1 | 3.76 | 8.18 | - | - | - | ||||
Final Supply Condition | Cold Finished (Hard)(HK) | Cold drawn and stress-relieved(BK+S) | Cold drawn and stress-relieved(BK+S) | Hardness HB | ||||
Parameters | T.S | Elongation | T.S | Y.S | Elongation | |||
obN/mm² | 65% | obN/mm² | obN/mm² | 65% | ||||
CK20 | ≥550 | ≥8 | ≥520 | ≥470 | ≥12 | ≥12 | ||
CK45 | ≥650 | ≥5 | ≥600 | ≥520 | ≥12 | 207 | ||
ST52 | ≥640 | ≥5 | ≥600 | ≥520 | ≥15 | 190 | ||
25Mn | ≥640 | ≥5 | ≥600 | ≥510 | ≥15 | 195 | ||
27SiMn | ≥840 | ≥5 | ≥800 | ≥720 | ≥10 | 230 | ||





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