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Txij li cov no yog lub luag haujlwm hnyav ASTM A194 chav kawm chav kawm 2H muaj cov chav kawm roj carbon ntau, mangelese, phosphorus, leej faj thiab silicon.

Txuas:4.5ASTM A335 P11 PIPA BAJA Seamless337Pom lsaw erw EFW
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4140 yog cov chromium-molybdenum alloy steel nrog lub cev hnyav-rau-muaj zog piv. Nws muaj zog ntau dua li cov qauv hlau. Txawm hais tias nws yog ib lub chrome hlau thiab feem ntau hu ua "Chrome hlau", nws tsis muaj cov chromium ntau li cov hlau tsis muaj roj stainless. Raws li qhov tshwm sim, corrosion kuj yog txhim kho piv rau cov qauv hlau, tab sis tsis yog tib yam li cov hlau stainless. Tsis tas li ntawd, cov kev sib tw sae 4140 alloy alloy tau siv los ua cov txuas ntawm cov kav dej nruab nrab. Lawv kuj ua raws li cov ntsaws kom tiv taus lub siab nyob rau hauv lub siab valve. Cov no yog nyob rau hauv kev thov loj heev nyob rau ntau qhov kev lag luam kev lag luam loj loj. SAE 4140 Alloy puag ncig yog ib qho ntawm cov muag khoom zoo tshaj plaws thiab paub rau nws cov khoom ua pov thawj ruaj khov.

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    Kovar alloy 4J25