GB/T 18254-2002 Translated English of Chinese Standard. (GBT 18254-2002, GB/T18254-2002, GBT18254-2002): High-carbon chromium bearing steelhttps://www.chinesestandard.net, 2015 M07 7 - 51 páginas This Standard specifies the order contents, dimension, shape, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of the high-carbon chromium bearing steel. |
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0.5 Total length Analysis of Iron Brinell hardness carbide liquation carbide net-shaped carbide ribbon-shaped Chemical Analysis Chemical Composition Chromium Bearing Steel clearing depth Coarse-series Thickness cold-drawn rolled cold-drawn steels continuously cast steel contract decarburized layer depth delivered according delivery length Designation and Chemical diagram in Appendix diameter larger diameter not larger dimension Dimethylglyoxime GCr15SiMo GCr4 Grade 0.5 Total Grade 1 Grade head and tail High-carbon Chromium Bearing hot-press processing hot-rolled forged hot-rolled round-steel hot-rolled spheroidized ingot larger than 60mm macrostructure inspection mass fraction Methods for Chemical Micro cavity mold-stool Molybdenum nitric acid nonmetallic inclusion out-of-roundness Outer diameter oxygen content Photometric Method qualification grade quenching fracture re-inspection round-steel abbreviated round-steel with diameter softening annealed steels specific requirements specified in Table Spectrophotometric Method spheroidized or softening spheroidized steels Standard Steel and Alloy steel furnace steel-pipe steels with diameter stripe take one test tolerance shall meet total decarburized layer unqualified Wall thickness wire-rods