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钢筋实验取样长度标准(Standard length of experimental sampling for steel bars)
钢筋实验取样长度标准(Standard length of experimental sampling for steel bars) (a) hot rolled bar 1, the group rules With the same brand, the same stove number, the same specifications, the same delivery status, no more than 60 tons for a number of. 2, sampling method The tensile test: choose two steel cut. Two samples, sample length 500mm. Cold test: choose two steel cut from two samples, test length calculated: L=1.55* (a+d) +140mm Type: L sample length A - nominal diameter steel D - bending test bending center diameter; press table access Reinforced grades (grade HPB235) (grade I) HRB335 HRB400 HRB500 Nominal diameter (mm) of 8 ~ 206 ~ 2528 ~ 506 ~ 2528 ~ 506 ~ 2528 ~ 50 D 1A 3A 4A bend diameter 4A 5A 6A 7a In the sample cut, should be reinforced at the end of the 500mm removed after re cut. (two) low carbon steel wire rods 1, the group rules With the same brand, the same stove number, the same species, the same size, same condition of delivery, no more than 60 tons for a number of. 2, sampling method: Tensile test: choose a dish, cut a specimen from either end of the disc, the sample length of 500mm. Bending test: choose two disc, take a sample from either end of each cut per plate, sample length 200mm. In the sample cut, should be the end of 500mm removed after re cut. (three) cold drawn low carbon steel wire 1, the group rules A steel wire by plate test. With a diameter of 5 tons of steel grade for a number of optional three disc test. 2, sampling method From the end of each office amputated not less than 500mm, and two samples of a stretch, a repeated bending, tensile specimen length 500mm, repeated bending specimen length 200mm. (four) cold rolled ribbed bar The mechanical properties and processing properties of 1 cold-rolled ribbed bars by plate test, since each disk at either end of two truncated 500mm samples, tensile specimens of long 500mm, long 200mm cold bending specimen. 2, to supply 550 bundles of cold rolled ribbed bar by bundle test. With a steel on intercep
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