316 Stainless Hlau Yeeb thiab Tube: Molybdenum-Txhim kho chloride-Resistant Piping
Jan 30, 2026
Tso lus
Dab tsi yog 316 Stainless Hlau Yeeb thiab Tube?
316 stainless hlau yeeb nkab thiab raj yog austenitic cov khoom uas muaj 2.00 mus rau 3.00 feem pua molybdenum, ib qho ntxiv uas sharply txhim khu kev tiv thaiv pitting thiab crevice corrosion los ntawm chloride ions piv nrog 304. Qhov no ua rau 316 piping tus qauv specification rau ntug hiav txwv dej, marine thiab weakly corrosive industrial kev pab cuam, nrog rau cov khoom noj khoom haus cov txheej txheem. Cov khoom yog tsim seamless los yog welded, thiab yog them los ntawm ASTM A312 rau seamless thiab welded yeeb nkab, A358 rau loj - txoj kab uas hla welded yeeb nkab, A213 rau seamless boiler thiab tshav kub-exchanger raj, A269 rau me me - txoj kab uas hla tubing, thiab A9ances European sib npaug yog EN 1.4401 thiab 1.4404, thiab Japanese sib npaug yog JIS SUS316 / SUS316L.
Chemical Composition ntawm 316, 316L thiab 316H
Peb qib sib koom chromium, npib tsib xee thiab molybdenum ntau yam tab sis txawv ntawm kev tswj cov pa roj carbon . 316L txwv cov pa roj carbon kom tsis txhob hnov qab thaum vuam; 316H tuav cov pa roj carbon monoxide ntawm 0.04 thiab 0.10 feem pua kom tuav lub zog creep ntawm qhov kub siab.
| Element | 316 S31600 | 316L S31603 | 316H S31609 |
|---|---|---|---|
| Cov pa roj carbon, max | 0.08 | 0.030 | 0.04-0.10 |
| Manganese, max | 2.00 | 2.00 | 2.00 |
| Phosphorus, max | 0.045 | 0.045 | 0.045 |
| Sulfur, max | 0.030 | 0.030 | 0.030 |
| Silicon, max | 0.75 | 0.75 | 0.75 |
| Chromium | 16.0-18.0 | 16.0-18.0 | 16.0-18.0 |
| Nickel | 10.0-14.0 | 10.0-14.0 | 10.0-14.0 |
| Molybdenum | 2.0-3.0 | 2.0-3.0 | 2.0-3.0 |
| Nitrogen, max | 0.10 | 0.10 | - |
Mechanical Properties thiab Cov yam ntxwv tseem ceeb
Annealed mechanical xav tau rau cov qib yeeb nkab ua raws ASTM A312. Qhov ceev yog 7.98 g / cm3 thiab cov melting ntau yog kwv yees li 1375 txog 1450 degrees C.
| Khoom | 316 / 316H | 316L |
|---|---|---|
| Tensile zog, min | 515 MPa ua | 485 MPa ua |
| Yield zog, min | 205 MPa | 170 MPa |
| Elongation, min | 40 feem pua | 40 feem pua |
| Hardness, max | 217 HWB | 217 HWB |
Cov yam ntxwv tseem ceeb muaj xws li molybdenum- txhawb nqa kev tiv thaiv rau pitting thiab crevice nres, zoo heev formability thiab weldability rau complex piping layouts, ruaj khov mechanical zog los ntawm nruab nrab - kub ntau rau cov txheej txheem piping, thiab dav adaptability nyob rau hauv marine, tshuaj thiab ntug dej hiav txwv daim ntaub ntawv. Tus lej sib npaug pitting, Cr + 3.3Mo + 16N, yog li 24 ntawm qhov tsawg kawg nkaus, piv nrog kwv yees li 19 rau 304.
Siv tau cov qauv thiab qhov ntev
ASTM A312 npog seamless thiab ncaj-seam welded yeeb nkab nyob rau hauv 316, 316L thiab 316H nyob rau hauv cov txheej txheem teem sij hawm los ntawm me me - tho rau loj diameters, nrog phab ntsa thicknesses matched rau nominal yeeb nkab qhov ntau thiab tsawg ntawm ASME B36.19. ASTM A213 npog seamless boiler, superheater thiab cua sov-exchanger tubes, uas feem ntau yog muab rau nruj me ntsis kam rau ua. ASTM A269 npog me me -inch seamless thiab welded tubing rau dav, qis{12}} thiab nruab nrab- kev pabcuam siab. Seamless khoom feem ntau muaj los ntawm 6 mus rau 650 mm sab nraud txoj kab uas hla nrog phab ntsa ntawm 0.5 mus rau 50 mm; welded yeeb nkab txuas mus txog 3000 hli sab nraud txoj kab uas hla nrog phab ntsa ntawm 1 mus rau 150 hli. Dimensional tolerances raug txheeb xyuas rau ASTM A999.
Tej kev siv
Marine engineering thiab ntug hiav txwv txheej txheem piping
Tshuaj thiab petrochemical hloov kab
Thaum tshav kub kub exchangers, condensers thiab boiler auxiliaries
Khoom noj khoom haus, dej haus thiab tshuaj txheej txheem kab
Seawater thiab brackish -dej systems ntawm ambient kub
Architectural handrails thiab structural tubing nyob rau hauv chloride atmospheres
Cov lus nug nquag
Q: Yuav ua li cas molybdenum txhim kho 316 yeeb nkab?Molybdenum ntxiv dag zog rau cov zaj duab xis passive thiab nce pitting thiab crevice corrosion kuj nyob rau hauv chloride media, uas 304 tsis tag nrho.
Q: Thaum twg yuav tsum tau teev tseg 316L yeeb nkab?Rau cov tshuab welded, tshwj xeeb tshaj yog hnyav- phab ntsa yeeb nkab, 316L zam chromium-carbide nag lossis daus hauv tshav kub- cuam tshuam, yog li tsis muaj kev tshaj tawm -weld tov annealing yog xav tau nyob rau hauv feem ntau cov kev pabcuam.
Q: Dab tsi yog 316H siv rau?316H tuav lub zog nkag siab dua ntawm qhov kub siab thiab tau teev tseg rau siab - muaj cov kav dej thiab cov kav dej saum toj li 525 degrees C.
Q: Seamless lossis welded 316 yeeb nkab?Seamless yeeb nkab haum rau siab - siab thiab me me - txoj kab uas hla; welded yeeb nkab yog economical rau loj diameters. Ob leeg tau txais los ntawm ASTM A312 thaum tsim khoom raws li nws cov cai.
Q: Puas yog 316 yeeb nkab haum rau dej hiav txwv?Rau ambient- kub, ntws dej hiav txwv nws ua tau zoo, tab sis cov dej hiav txwv stagnation nyob rau hauv crevices tuaj yeem ua rau muaj kev tawm tsam hauv zos; duplex lossis super- qib austenitic yog siv rau kev nkag mus tas li.
Q: Cov qauv twg tswj hwm 316 yeeb nkab?ASTM A312 rau cov yeeb nkab, A358 rau loj - txoj kab uas hla welded yeeb nkab, A213 rau boiler thiab cua sov- cov raj xa dej, A269 rau me me - txoj kab uas hla tubing, thiab A999 rau kev kam rau siab; Cov khoom sib npaug European ua raws EN 10216-5 thiab EN 10217-7.
Cov lus nug nquag
Q1. ASTM A312 txhais tau li cas rau 316 piping?
ASTM A312 npog 316 (UNS S31600) nrog cov pa roj carbon 0.08 max, qis-carbon 316L (UNS S31603) nrog 0.030 max, thiab siab -carbon 316H (UNS S31609) nrog 0.110% pertemperature{0. lub zog; tag nrho cov chromium 16.0-18.0, nickel 10.0-14.0 thiab molybdenum 2.0-3.0.
Q2. Dab tsi yog cov txheej txheem annealed mechanical?
Ib ASTM A312, 316 thiab 316H qhia lub zog tensile yam tsawg kawg nkaus 515 MPa thiab yield zog 205 MPa, thaum 316L qhia 485 MPa thiab 170 MPa; elongation yog 40 feem pua tsawg kawg rau txhua tus, qhov ceev yog 7.98 g / cm3 thiab melting ntau yog kwv yees li 1375 txog 1450 degrees C.
Q3. Dab tsi qhov ntev tuaj yeem 316 yeeb nkab thiab lub raj xa tuaj?
Seamless khoom feem ntau muaj los ntawm 6 mus rau 650 mm sab nraud txoj kab uas hla nrog phab ntsa los ntawm 0.5 mus rau 50 mm, thaum welded yeeb nkab txuas mus txog 3000 mm sab nraud txoj kab uas hla nrog phab ntsa ntawm 1 mus rau 150 mm; phab ntsa thicknesses sib phim rau nominal yeeb nkab qhov ntau thiab tsawg ntawm ASME B36.19 thiab qhov ntev ntev raug txheeb xyuas rau ASTM A999.
Q4. Cov European thiab Nyij Pooj sib npaug ntawm 316 yog dab tsi?
Cov European sib npaug yog EN 1.4401 thiab 1.4404, thiab Japanese sib npaug yog JIS SUS316 / SUS316L; Cov qauv khoom lag luam muaj xws li ASTM A358 rau loj- txoj kab uas hla welded yeeb nkab, A213 rau seamless boiler thiab cua sov- cov raj sib txuas, thiab A269 rau me - txoj kab uas hla.
Q5. PREN ntawm 316 yog dab tsi thiab nws siv qhov twg?
Tus lej sib npaug pitting, Cr + 3.3Mo + 16N, yog li 24 ntawm qhov tsawg kawg nkaus muaj pes tsawg leeg piv nrog roughly 19 rau 304, uas yog vim li cas 316 piping yog teev rau marine engineering, tshuaj thiab petrochemical hloov kab, tshav kub exchangers, zaub mov thiab tshuaj txheej txheem kab, thiab seawater systems ntawm ambient kub.
Xa kev nug