Report copyright - Announce · BS 4449 Grade BS 4449 Grade 250 0.270 0.065 0.065 0.450 25.48 At least (1988) 250 (1988) 460 Grade 460 0270 0.055 0.055 0.540 46.89 SD 30 0.300 0.060 0.060 0.500 SD 40
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