1.4401 vs 1.4301 Stainless hlau

Dab tsi yog cov khoom sib npaug rau 1.4301 stainless hlau?
1.4301 Stainless hlau yog sib npaug rau AISI 304 (tseem hu ua UNT tsis yog S30400). Raws li cov qauv European, nws tseem muaj npe hu ua x5crni18-10. Vim tias nws nominal muaj pes tsawg xyoo ntawm 18% lab thiab 8% npib tsib xee, nws yog qee zaum tseem hu los ntawm nws lub npe loj, 18/8.

 

Dab tsi yog ASTM sib npaug ntawm 1.4401 stainless hlau?

Lub ASTM sib npaug rau cov European Stainless Hlau Qib 1.440 yog astm 316. Tus Austenic ib puag ncig, vim nws cov molybdenum.

 

 

1.4401 (AISI 316) muaj 2 {{{{{{8% molybdenum, thaum 1.4301 (AISI 304) muaj tsis muaj Molybdenum. Raws li qhov tshwm sim, 1.440 tau kim dua thiab nyuaj rau lub tshuab, thaum nws muaj nqi ntau dua li cov ntawv thov tsawg dua.

1. Tshuaj lom neeg sib xyaw (%)​

(Per EN 10088-2 / ASTM A240 tus qauv)

1.4301 (AISI 304): feem ntau tsim ntawm chromium (18-20%) thiab npib tsib xee (8-10.5%).
1.4401 (AISI 316): Molybdenum (2-2.5%) ntxiv.

Lub ntsiab	​​1.4401 (316)​​	​​1.4301 (304)​​
Carbon (c)	Tsawg dua los yog sib npaug rau 0.08	Tsawg dua los yog sib npaug rau 0.07
Chromium (cr)	16.0–18.5	17.5–19.5
Npib tsib caug (ni)	10.0–14.0	8.0–10.5
Molybdenum (mo)	​​2.0–3.0​​	Tsis muaj
Manganese (mn)	Tsawg dua los yog sib npaug rau 2.0	Tsawg dua los yog sib npaug rau 2.0
Silicon (si)	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug rau 1.0
Phosphorus (p)	Tsawg dua los yog sib npaug rau 0.045	Tsawg dua los yog sib npaug rau 0.045
Sulphur (s)	Tsawg dua los yog sib npaug rau 0.030	Tsawg dua los yog sib npaug rau 0.030

​2. Cov khoom siv neeg kho tshuab (cov nqi tau ntawm chav tsev kub)​

(Per EN 10088-2 / ASTM A240)

Ntiag tug	​​1.4401 (316)​​	​​1.4301 (304)​​
Tensile lub zog (mpa)	515–795	500–700
Paib lub zog (0.2% offset, mpa)	205–515	205–500
Elongation (% hauv 50 hli)	Ntau dua los yog sib npaug rau 40	Ntau dua los yog sib npaug rau 40
Hardness (HRB)	Tsawg dua los yog sib npaug rau 95	Tsawg dua los yog sib npaug rau 95
Ntom ntom (g / cm³)	8.0	8.0

 

Puas yog 1.4401 thiab 1.4301 stainless hlau hlau nplaum?

Tsis yog, tsis yog 1.4401 (316) tsis yog 1.4301 (304) stainless hlau yog sib nqus zoo. Ob qho tib si yog Austenitic stainless hlau nrog lub crystal qauv uas feem ntau tsis- sib nqus, txawm tias lawv tuaj yeem ua tsis muaj zog tom qab ua haujlwm txias.

 

Corrosion Kuj:
1.4301 Stainless hlau ua tau zoo nyob rau hauv ntau ntau ib puag ncig, tab sis nws tsis kam mus rau chlorides thiab acidic tej yam kev mob yog qis dua rau ntawm 1.4401. Vim yog qhov sib ntxiv ntawm Molybdenum, 1.4401 stainless hlau cov khoom pov thawj zoo corrosion distance, tshwj xeeb tshaj yog hauv chloride {}}}} acidic ib puag ncig.

 

Luam ntawv
1.4401 Stainless hlau muaj 2 {{{4 {}} 3% molybdenum thiab ib me ntsis dua tsib xee cov ntsiab lus. Nws lub zog thiab hardness yog ib nyuag siab dua 1.4301. Txawm li cas los xij, thaum lub sijhawm ceev ceev lossis hnyav machining, 1.4401 cov khoom pov thawj me ntsis kev nqis tes ua kom muaj zog tiv thaiv.

 

Dab tsi yog qhov sib txawv ntawm 1.440 thiab 1.4404?
Cov ntaub ntawv 1.4401 thiab 1.440, uas yog cov vraa pawg, yooj yim rau kev siv lub tshuab thiab WELD. Nrog rau qhov sib ntxiv ntawm 2-2.5% Molybdenum, ob qib kawm pom zoo corrosion tsis kam txawm nyob rau hauv muaj cov kab chlorides.