304 vs 316 stainless hlau: Qhov twg yog qhov zoo dua rau kev siv dej hiav txwv?

Nyob rau hauv ib puag ncig marine, cov khoom tsis ua hauj lwm tsis yog kim xwb, tab sis yuav tsum tau xaiv cov khoom siv tsis ncaj ncees lawm - nws kuj yog qhov tsis zoo. Cov kev tshawb fawb qhia tau hais tias nyob rau hauv ntug hiav txwv dej thiab offshore daim ntaub ntawv, tshaj 60% ntawm stainless hlau corrosion tsis ua hauj lwm yog tshwm sim los ntawm chloride-induced pitting corrosion; Vim li no, kev xaiv cov khoom siv yog qhov tseem ceeb tshaj plaws hauv kev txiav txim siab yuav khoom. Thaum muab piv rau 304 thiab 316 stainless hlau, qhov corrosion kuj ntawm 316 tiv thaiv dej hiav txwv tau pom tias yog peb mus rau tsib npaug ntau dua li ntawm 304.

Rau cov neeg yuav khoom lub luag haujlwm rau kev tsim cov khoom siv rau kev tsim cov nkoj, cov kav dej hiav txwv, lossis cov qauv hauv ntug dej hiav txwv, qhov tseem ceeb no yog qhov tseem ceeb rau kev txo cov nqi tu, ncua kev pab cuam lub neej, thiab ua kom ntev ntev - kev ntseeg tau.

 

Puas yuav 304 stainless hlau xeb hauv dej ntsev?

Yog lawm. Thaum 304 yog corrosion-resistant nyob rau hauv dej tshiab, nws yog heev raug rau pitting corrosion thiab "tea staining" thaum raug dej ntsev los yog ntsev tsuag. Nyob rau hauv ib puag ncig marine, 304 stainless hlau tuaj yeem pib pom qhov xeb lossis cov txheej txheem degradation nyob rau lub hlis, ua rau nws tsis haum rau dej hiav txwv ncaj qha - huab cua raug.

 

Vim li cas 316 stainless hlau hu ua "Marine Grade"?

Qib 316 muaj 2% mus rau 3% Molybdenum, ib qho kev sib xyaw ua ke uas tshwj xeeb tiv thaiv chlorides (xws li ntsev). Cov tshuaj ntxiv no muab 316 ntau dua PREN (Pitting Resistance Equivalent Number), tso cai rau nws tswj hwm nws cov qauv kev ncaj ncees thiab kev zoo nkauj tiav nyob rau hauv siab -salinity ib puag ncig qhov twg lwm yam steels ua tsis tiav.

 

304 vs 316 stainless hlau: Tshuaj lom neeg sib piv (wt%)

Element (Max tshwj tsis yog ntau yam)	Qib 304	Qib 304L	Qib 316	Qib 316L
Cov pa roj carbon (C)	0.08%	0.03%	0.08%	0.03%
Manganese (Mn)	2.00%	2.00%	2.00%	2.00%
Silicon (Si)	0.75%	0.75%	0.75%	0.75%
Phosphorus (P)	0.045%	0.045%	0.045%	0.045%
Sulfur (S)	0.030%	0.030%	0.030%	0.030%
Chromium (Cr)	18.0 - 20.0	18.0 - 20.0	16.0 - 18.0	16.0 - 18.0
Nickel (Ni)	8.0 - 10.5	8.0 - 12.0	10.0 - 14.0	10.0 - 14.0
Molybdenum (hli)	-	-	2.00 - 3.00	2.00 - 3.00
Nitrogen (N)	0.10%	0.10%	0.10%	0.10%

 

304 vs 316 stainless hlau: Mechanical Properties (Min. Values)

Khoom	316	304
Tensile zog	Ntau dua lossis sib npaug rau 515 MPa (75 ksi)	Ntau dua lossis sib npaug rau 485 MPa (70 ksi)
Lub zog muaj zog (0.2%)	Ntau dua lossis sib npaug rau 205 MPa (30 ksi)	Ntau dua lossis sib npaug rau 170 MPa (25 ksi)
Elongation (hauv 50mm)	Ntau dua lossis sib npaug li 40%	Ntau dua lossis sib npaug li 40%
Hardness (Rockwell B)	Tsawg dua lossis sib npaug rau 92 HRB	Tsawg dua lossis sib npaug rau 92 HRB
Hardness (Brinell)	Tsawg dua lossis sib npaug rau 201 HBW	Tsawg dua lossis sib npaug rau 201 HBW

 

304 vs . 316 Stainless Steel: Corrosion Resistance

316 stainless hlau muaj kev tiv thaiv corrosion zoo dua piv rau 304, feem ntau vim yog qhov sib ntxiv ntawm 2-3% molybdenum, ua rau nws tiv taus chloride pitting, marine ib puag ncig, thiab cov tshuaj hnyav dua. Thaum 304 zoo heev rau kev siv dav dav, 316 muab kev ua haujlwm ntev dua hauv cov xwm txheej hnyav.

 

 

Tus nqi sib txawv ntawm 304 thiab 316 puas tsim nyog?

Rau kev siv marine, yog. Thaum 316 stainless hlau feem ntau yog 30% mus rau 50% kim tshaj li 304, nws muaj ntau dua Return on Investment (ROI) los ntawm kev tshem tawm cov nqi zog thiab cov khoom siv uas nquag hloov thiab kho los ntawm ntsev- dej puas.

 

304 vs . 316 Stainless hlau: Yuav xaiv li cas?

Rau kev siv dav dav -cov hom phiaj: xws li cov khoom siv hauv chav ua noj, cov khoom siv hauv tsev, lossis ib puag ncig me me, 304 stainless hlau raug pom zoo raws li tus nqi - xaiv tau zoo. Txawm li cas los xij, thaum ntsib kev xeb los ntawm cov tshuaj chlorides, dej ntsev, lossis cov khoom siv tshuaj, 316 stainless hlau (uas muaj molybdenum) yuav tsum raug xaiv los ua kom muaj kev tiv thaiv corrosion zoo dua. Nyob rau hauv ib puag ncig hnyav, 316 stainless hlau muaj lub neej ua haujlwm ntev, ua rau nws 30% mus rau 40% tus nqi siab dua qhov tsim nyog peev.

 

Raws li lub ntiaj teb ua lag luam muab kev daws teeb meem stainless hlau, GNEE muaj ntau yam ntawm 304 thiab 316/316L stainless hlau khoom. Cov ntaub ntawv dav dav no suav nrog seamless thiab welded tubing, siab -precision nruab nrab- mus rau -hnyav daim hlau, txias- thiab kub- dov coils, ntau yam kev lag luam puag ncig, nrog rau cov flanges thiab cov yeeb nkab fittings -yog li ntawd cov khoom siv raw khoom ua tau raws li qhov xav tau ntawm kev tsim khoom, kev tsim khoom thiab kev tsim khoom. kho kom zoo nkauj sectors.

 

Xav tau ib daim ntawv qhia rau Marine Qib 316L Pipes lossis Fittings

 

Txhawm rau kom muaj kev nyab xeeb ntawm cov khoom thaum lub sij hawm kev thauj mus los thoob ntiaj teb, GNEE nruj me ntsis ua raws li cov txheej txheem export ntim thoob ntiaj teb. Peb cov txheej txheem ntim khoom nruj yuav suav nrog bundling nrog woven hnab, qhwv nrog cov ntawv tsis muaj dej, thiab ua kom cov khoom thauj nrog cov hlua khi hlua khi; Tsis tas li ntawd, nyob ntawm cov yam ntxwv tshwj xeeb ntawm cov khoom, peb siv cov fumigated ntoo crates ruaj khov lossis hnyav - lub luag haujlwm pallets los muab kev tiv thaiv siab tshaj plaws.