1. ** Dab tsi yog astm yeeb nkab qib? **
ASTM cov xaim xaim xaim yog cov qauv kev faib tawm rau cov kav dej, txhais los ntawm Asmeskas haiv neeg rau kev sim thiab cov ntaub ntawv (ASTM). Cov qhab nia cov ntaub ntawv tshwj xeeb rau cov khoom siv tshuaj ntsuab, xws li siv lub zog, tawm los ntawm kev kho cua sov, thiab npaj sov. Piv txwv li:
{{0 {{}}} **: Siab - kub verritic alloy steel kav (piv txwv, P22, P92).
{{0-}}} **: Seamless Ferritic / Austenitic Alloy Steel Boiler Tubes (piv txwv li T92).
Cov qib nyiam P5, P22, thiab P92 txheeb xyuas tshwj xeeb alloys ua kom zoo rau ib puag ncig xws li lub hwj chim nroj tsuag lossis petrochemical chaw.
2. ** Dab tsi yog qhov txawv ntawm A335 thiab SA335? **
** A335 ** THIAB ** SA335 ** Xa mus rau tib cov qauv txheej txheem rau kev sib tw ntawm cov kav hlau uas siv rau hauv cov pa roj av. Cov thawj ua ntej qhia tau tias lub koom haum saib xyuas kev ua haujlwm:
{{0 {{}}}}} ** 3 t35 **: tshaj tawm los ntawm ASTM International.
-}}}}} ** **: saws los ntawm American Society of Americical engineers (piv txwv li, ASME boiler thiab siab hlab boiler code).
Cov ntaub ntawv xav tau (tshuaj, tshuab) zoo ib yam; Tsuas yog cov thawj coj ua txawv.
3. ** Dab tsi yog lub hardness ntawm Astm A335 P22? **
ASTM A335 P22 feem ntau muaj ** brinell hardness (HBW) ntawm ~ 144 ** Tom qab kev kho cua sov (ib txwm ua thiab tempering). Tshaj tawm -}}} Tus kab mob yuav hloov qhov no, tab sis tswj tau ua rau Hardness hauv qab no ** 22 HRC ** kom tsis txhob tawg txias. Hardness values kom weldability thiab tiv taus deformation nyob rau hauv kev ntxhov siab.
4. ** Dab tsi yog astm 335 p5 khoom? **
ASTM A335 P5 yog ib qho nruab nrab {-}} Almoy- Resistant steel ** nrog kwv yees kwv yees:
{{0 - ** C **: 4.0-6.0%, ** "Mo **: 0.45-0.65%, ** Tsawg dua lossis sib npaug ntawm 0.15%.
Nws muaj zoo heev ** Kuj yuav tsum siab - kub sulphur corrosion ** (txog 600 degree) thiab hydrogen nres. Cov yam ntxwv tseem ceeb suav nrog:
{{0- tensile lub zog ntau dua los yog sib npaug rau 415 MPa, tawm tsam lub zog ntau dua los yog sib npaug rau 205 MPa.
-}} siv nyob rau hauv cov roj refinery piping (piv txwv li, catalytic crackers, cov chav ua haujlwm) thiab boiler.
Nws suav sib npaug yog ** 1cr5mo ** (GB 9948 txuj).
5. ** Dab tsi yog attm A335 qib P92? **
ASTM A335 P92 yog ib qho ** 9% Chromium Martensitic Steel ** Txhim Kho rau Ultra- supercritical (USC) cov nroj tsuag fais fab. Cov Nta Tseem Ceeb:
-}}} ** alloying **: cr (8.5-9%), w (1.5-2.0%), V, NB, N.
{{0-}}}}} Txheem cov khoom **: tensile lub zog ntau dua los yog sib npaug zos rau 420 mpa kom muaj 440 MPa.
{{0-}} ** Daim Ntawv Thov / Kev Ua Si Super) Hauv Paib (tsawg dua
