Hole-Type - Page 11

BLOCK THICKNESS Thickness of specimen, weld, or object to be radiographed (INCH) FRACTION (OF INCH) (MM) 0.250 1/4 6.35 0.300 19/64 7.62 0.312 5/16 7.87 0.350 21/64 8.89 0.375 3/8 9.53 0.400 13/32 10.16 0.435 7/16 11.05 0.450 29/64 11.43 0.500 1/2 12.70 0.550 35/64 13.97 0.560 9/16 14.22 0.600 39/64 15.24 0.625 5/8 15.88 0.650 21/32 16.51 0.688 11/16 17.46 0.700 45/64 17.78 0.750 3/4 19.05 0.800 51/64 20.32 0.810 13/16 20.57 0.850 27/32 21.59 0.875 7/8 22.23 0.900 29/32 22.86 0.935 15/16 23.75 0.950 61/64 24.13 1.000 1.000 25.40 1.125 1 1/8 28.58 1.250 1 1/4 31.75 1.375 1 3/8 34.93 1.500 1 1/2 38.10 1.625 1 5/8 41.27 1.750 1 3/4 44.45 1.875 1 7/8 47.63 2.00 2.000 50.80 2.125 2 1/8 53.98 2.250 2 1/4 57.15 2.375 2 3/8 60.33 2.500 2 1/2 63.50

IQI THICKNESS 2% of Thickness of specimen, weld, or object to be radiographed   IDENTIFICATION NUMBER (INCH) (MM) ASME ASTM MIL-271 SHIPS ASTM E 1742 AMS 0.0050 0.1270 5 .25 .25 0.0060 0.1524 — .30 — 0.0062 0.1575 6 — .31 0.0070 0.1778 — .35 — 0.0075 0.1905 7 — .37 0.0080 0.2032 — .40 — 0.0087 0.2210 8 — .43 0.0090 0.2286 — .45 — 0.0100 0.2540 10 .50 .50 0.0110 0.2794 — .55 — 0.0112 0.2845 11 — .56 0.0120 0.3048 — .60 — 0.0125 0.3175 12 — .62 0.0130 0.3302 — .65 — 0.0137 0.3493 14 — .68 0.0140 0.3556 — .70 — 0.0150 0.3810 15 .75 .75 0.0160 0.4064 — .80 — 0.0162 0.4115 16 — .81 0.0170 0.4318 — .85 — 0.0175 0.4445 17 — .87 0.0180 0.4572 — .90 — 0.0187 0.4750 18 — .93 0.0190 0.4826 — .95 — 0.0200 0.5080 20 1.0 1.0 0.0225 0.5715 22 1.1 1.1 0.0250 0.6350 25 1.2 1.2 0.0275 0.6985 27 1.3 1.3 0.0300 0.7620 30 1.5 1.5 0.0325 0.8255 32 1.6 1.6 0.0350 0.8890 35 1.7 1.7 0.0375 0.9525 37 1.8 1.8 0.0400 1.0160 40 2.0 2.0 0.0425 1.0795 42 2.1 2.1 0.0450 1.1430 45 2.2 2.2 0.0475 1.2065 47 2.3 2.3 0.0500 1.2700 50 2.5 2.5

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