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HARDNESS RANGES
(Based on ASTM A623)| Designation | T-1 | T-2 | T-3 | T-4 | T-5 | DR-8 | DR-9 |
|---|---|---|---|---|---|---|---|
| Aim Rockwell Range (30-T Scale) | 45-53 | 49-57 | 53-61 | 57-65 | 61-69 | 70-76 | 73-79 |
TIN COATING WEIGHTS
(Based on ASTM A624)| Designation | lbs/BB | g/m2 |
|---|---|---|
| 10 | 0.05/0.05 | 1.1/1.1 |
| 20 | 0.10/0.10 | 2.2/2.2 |
| 25 | 0.125/0.125 | 2.8/2.8 |
| 35 | 0.175/0.175 | 3.9/3.9 |
| 50 | 0.25/0.25 | 5.6/5.6 |
| 75 | 0.375/0.375 | 8.4/8.4 |
| 100 | 0.50/0.50 | 11.2/11.2 |
| 50/25 | 0.25/0.125 | 5.6/2.8 |
| 75/25 | 0.375/0.125 | 8.4/2.8 |
| 75/50 | 0.375/0.25 | 8.4/5.6 |
| 100/25 | 0.50/0.125 | 11.2/2.8 |
| 100/50 | 0.50/0.25 | 11.2/5.6 |
| 100/75 | 0.50/0.375 | 11.2/8.4 |
| 135/25 | 0.675/0.125 | 15.2/2.8 |
DECIMAL EQUIVALENTS
| Fraction | Decimal | Millimeter |
|---|---|---|
| 1/16 | 0.0625 | 1.5875 |
| 1/8 | 0.1250 | 3.1750 |
| 3/16 | 0.1875 | 4.7625 |
| 1/4 | 0.2500 | 6.3500 |
| 5/16 | 0.3125 | 7.9375 |
| 3/8 | 0.3750 | 9.5250 |
| 7/16 | 0.4375 | 11.1125 |
| 1/2 | 0.5000 | 12.7000 |
| 9/16 | 0.5625 | 14.2875 |
| 5/8 | 0.6250 | 15.8750 |
| 11/16 | 0.6875 | 17.4625 |
| 3/4 | 0.7500 | 19.0500 |
| 13/16 | 0.8125 | 20.6375 |
| 7/8 | 0.8750 | 22.2250 |
| 15/16 | 0.9375 | 23.8125 |
| 1 | 1.0000 | 25.4000 |
THICKNESS CONVERSION
| Base Weight (lbs) | Thickness (inches) | Thickness (mm) |
|---|---|---|
| 50 | 0.0055 | 0.140 |
| 54 | 0.0059 | 0.151 |
| 55 | 0.0061 | 0.154 |
| 57 | 0.0063 | 0.159 |
| 59 | 0.0065 | 0.165 |
| 61 | 0.0067 | 0.170 |
| 63 | 0.0069 | 0.176 |
| 65 | 0.0072 | 0.182 |
| 66 | 0.0073 | 0.184 |
| 68 | 0.0075 | 0.190 |
| 70 | 0.0077 | 0.196 |
| 72 | 0.0079 | 0.201 |
| 74 | 0.0081 | 0.207 |
| 75 | 0.0081 | 0.207 |
| 77 | 0.0085 | 0.215 |
| 79 | 0.0087 | 0.221 |
| 81 | 0.0089 | 0.226 |
| 83 | 0.0091 | 0.232 |
| 85 | 0.0094 | 0.237 |
| 86 | 0.0095 | 0.240 |
| 87 | 0.0096 | 0.243 |
| 89 | 0.0098 | 0.249 |
| 91 | 0.0100 | 0.254 |
| 93 | 0.0102 | 0.260 |
| 95 | 0.0105 | 0.265 |
| 96 | 0.0106 | 0.268 |
| 98 | 0.0108 | 0.274 |
| 100 | 0.0110 | 0.279 |
| 102 | 0.0112 | 0.285 |
| 104 | 0.0114 | 0.291 |
| 105 | 0.0116 | 0.293 |
| 107 | 0.0118 | 0.299 |
| 109 | 0.0120 | 0.305 |
| 111 | 0.0122 | 0.310 |
| 113 | 0.0124 | 0.316 |
| 115 | 0.0127 | 0.312 |
| 116 | 0.0128 | 0.324 |
| 118 | 0.0130 | 0.330 |
| 120 | 0.0132 | 0.335 |
| 122 | 0.0134 | 0.341 |
| 124 | 0.0136 | 0.346 |
| 125 | 0.0138 | 0.349 |
| 127 | 0.0140 | 0.355 |
| 129 | 0.0142 | 0.360 |
| 131 | 0.0144 | 0.366 |
| 133 | 0.0146 | 0.372 |
| 135 | 0.0149 | 0.377 |
| 136 | 0.0150 | 0.380 |
| 139 | 0.0153 | 0.388 |
| 141 | 0.0155 | 0.394 |
| 145 | 0.0160 | 0.405 |
| 148 | 0.0163 | 0.414 |