ASTM A193 B7 Hex Bolt zuru ọkara na-eri B18.2.1
ASTM A193 Nkọwapụta B7 Nkọwapụta chọrọ maka ihe dị elu tensile Alloy steel na-egbu egbu maka iji na nnukwu okpomọkụ ma ọ bụ ọrụ nrụgide na ngwa kachasị sie ike.
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ASTM A193 Grade B7M Bolts na studs nwere otu kemịkalụ dị ka akara ube carbon nchara) mana nwere ike iji nweta 100% ike na-enyocha 100% na-elele na ngwa ngwa niile arụpụtara na ogbe niile. Ọdịdị B7M na-eguzogide chloride na chloride, sọlfọ na nrụgide hydrogen corrosion cracking (SCC) ma na-ejikarị ọrụ gas gas.
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Kovar alloy 4J29