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Astm a193 grade b7 specification covers requirements for high tensile alloy steel bolting material for use in high temperature or high-pressure service and other special purpose applications. it is a standard specification defining typical chemical composition, mechanical properties, hardness requirement, preferential heat treatment, product marking, certification and other requirements, …

Except for the very lowest grades, metric nuts and bolts all carry identification markings which indicate their strength. on the head of each bolt are two numbers separated by a decimal point, the full list includes ten grades from 3.6 to 14.9 but in plant and machinery only grades 8.8, 9.8, 10.9 and 12.9 are normally found.

Welcome to lituo bolts as a high tensile fastener manufacturer and supplier, lituo bolts co.,ltd is committed to superior quality and prompt delivery at the best possible prices.our main products are hex bolts,hex nuts,shear studs,structural assemblies.

Jul 02, 2019 · stud bolts, threaded stud threaded bars ifi 136 10# length 1 meter materials ss 304 description products name: threaded studs materials: stainless steel 304 tensile strength: >520 mpa yield strength σ0.2: >205 ...

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