904 Stainless Hlau PhajPuas yog ib hom ntawm Austenitic stainless hlau nrog heev cov ntsiab lus cov pa roj carbon ntau thiab muaj kev sib tshuam siab tsim rau ib puag ncig nrog kev tsis muaj corrosion. Nws tau zoo dua corrosion tsis kam dua 316L thiab 317L, thaum noj mus rau hauv tus account ob tus nqi thiab kev ua haujlwm. Tus nqi zoo rau nyiaj. Vim yog qhov ntxiv ntawm 1.5% tooj liab, nws muaj qhov zoo corrosion tsis kam tawm tsam txo cov kua qaub xws li sulfuric acid thiab phosphoric acid. Nws tseem muaj qhov zoo tshaj plaws corrosion tawm tsam kev ntxhov siab corrosion, pitting thiab crevice corrosion tshwm sim los ntawm cov txheej txheem sib zog, thiab muaj qhov zoo tiv thaiv kom muaj kev txhim kho corrosion. Hauv cov sulfuric acid hauv cov ntsiab lus ntawm 0-98%, qhov kev pabcuam kub ntawm 904L phaj tuaj yeem nce li 40 degrees Fahrenheit.
Hauv cov kua qaub ntshiab hauv cov ntsiab lus ntawm 0-85%, nws corrosion tsis kam yog qhov zoo heev. Hauv kev lag luam phosphoric acid tsim los ntawm cov txheej txheem ntub dej, impurities muaj qhov cuam tshuam muaj zog rau corrosion tsis kam. Ntawm txhua hom kua qaub, 904L Super Austenitic Stainless hlau muaj zoo corrosion tsis kam dua li delity stainless hlau. Nyob rau hauv muaj kuab oxidizing nitric acid, 904L stainless hlau muaj qis corrosion tsis tshua muaj cov hlau uas tsis muaj nyiaj uas tsis muaj nyiaj. Hauv hydrochloric acid, kev siv ntawm904L stainless hlau daim hlauyog txwv rau qis dua ntawm 1-2%.
Hauv cov kua qaub ntshiab hauv cov ntsiab lus ntawm 0-85%, nws corrosion tsis kam yog qhov zoo heev. Hauv kev lag luam phosphoric acid tsim los ntawm cov txheej txheem ntub dej, impurities muaj qhov cuam tshuam muaj zog rau corrosion tsis kam. Ntawm txhua hom kua qaub, 904L Super Austenitic Stainless hlau muaj zoo corrosion tsis kam dua li delity stainless hlau. Nyob rau hauv muaj kuab oxidizing nitric acid, 904L stainless hlau muaj qis corrosion tsis tshua muaj cov hlau uas tsis muaj nyiaj uas tsis muaj nyiaj. Hauv hydrochloric acid, kev siv ntawm904L stainless hlau daim hlauyog txwv rau qis dua ntawm 1-2%.
| Teem nqi | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
| 904L | 0.020 max | 2.00 Max | 1.00 Max | 0.040 max | 0.030 max | 19.00 - 23.00 | 4.00 - 5.00 Max | 23.00 - 28.00 | 1.00 - 2.00 |
Lub Sijhawm Post: Lub Tsib Hlis-23-2024