Taw qhia rau ASTM B729:
ASTM B729 Cov khoom lag luamyog ib qho tseem ceeb ntawm cov txheej txheem tsim los ntawm American Society for Testing and Materials (ASTM) tswj cov seamlessUNS N08020 UNS N08026 UNS N08024 UNS N08925 UNS N08926, thiabUNS N08354nickel alloy yeeb nkab thiab cov ntaub ntawv raj. Cov qauv no ua haujlwm raws li cov lus qhia dav dav rau kev lag luam uas xav tau seamless nickel alloy kav thiab cov raj nrog cov tshuaj lom neeg tshwj xeeb, cov khoom siv kho tshuab, qhov tseeb qhov tseeb, thiab kev ntsuas kev ruaj ntseg.
Covered Qib thiab Tshuaj Chemical Composition:
1. ASTM B729 UNS N08020 Cov Lus Qhia Tshwj Xeeb (Alloy 20, Carpenter 20, 2.4660): Feem ntau yog tsim los ntawm npib tsib xee, chromium, thiab hlau, Alloy 20 exhibits exceptional corrosion kuj nyob rau hauv ntau yam acidic ib puag ncig, ua rau nws haum rau tshuaj ua thiab tshuaj siv.
2. UNS N08026 (Alloy 25-6Mo): Cov hlau no, suav nrog npib tsib xee, chromium, molybdenum, thiab hlau, muaj kev tiv thaiv zoo heev rau pitting thiab crevice corrosion nyob rau hauv aggressive chloride-muaj ib puag ncig, rendering nws zoo tagnrho rau marine thiab offshore daim ntaub ntawv.
3. UNS N08024 (Alloy 24): Alloy 24 nta cov ntsiab lus siab nickel nrog ntxiv ntawm chromium, molybdenum, thiab tooj liab, muab kev tiv thaiv corrosion zoo tshaj hauv sulfuric acid ib puag ncig, ua rau nws tsim nyog rau kev lag luam tshuaj lom neeg.
4. UNS N08925 (Alloy 925): Alloy 925 yog tus cwj pwm los ntawm nws cov ntsiab lus siab nickel nrog rau kev ntxiv ntawm chromium, molybdenum, thiab tooj liab, muab kev tiv thaiv tshwj xeeb rau kev ntxhov siab corrosion cracking thiab pitting nyob rau hauv qaub roj ib puag ncig, feem ntau siv hauv roj thiab roj ntau lawm.
5. UNS N08926 (Ntaus 926): Alloy 926 nthuav tawm txhim kho corrosion kuj piv rauluj 904l, ua rau nws tsim nyog rau kev txhoj puab heev ib puag ncig ntsib hauv kev ua tshuaj lom neeg, pulp thiab ntawv, thiab offshore industries.
6. UNS N08354 (Alloy 254 SMO): Alloy 254 SMO yog austenitic stainless hlau high-alloy austenitic stainless hlau nrog ntxiv ntawm molybdenum, nitrogen, thiab chromium, muab superior corrosion kuj nyob rau hauv ib puag ncig uas muaj chloride, haum rau tshuaj ua thiab desalination nroj tsuag.
Mechanical Properties:
- Tensile Strength (550 Mpa min): Qhov siab tshaj plaws ntawm cov khoom siv tuaj yeem tiv taus ua ntej tawg hauv qhov nro.
- Yield Strength (240 Mpa min): Qhov kev ntxhov siab ntawm cov khoom siv qhia txog qhov sib txawv ntawm qhov sib piv ntawm kev ntxhov siab thiab kev nyuaj siab.
- Elongation (30 feeb): Qhov feem pua nce ntawm qhov ntev ntawm cov khoom thaum lub sij hawm ntsuas tensile ua ntej rupture tshwm sim.
Dimensions, Tolerances, thiab Manufacturing Process:
ASTM B729 qhia txog qhov ntsuas qhov ntev thiab kev ua siab ntev rau seamless npib tsib xee alloy cov kav dej thiab cov raj kom ntseeg tau tias muaj kev sib haum xeeb thiab qhov tseeb hauv lawv cov khoom siv.
Cov txheej txheem tsim khoom rau seamless nickel alloy kav thiab cov raj yuav koom nrog:
- Kub Extrusion los yog Piercing: Cov hlau molten raug yuam los ntawm kev tuag los tsim cov yeeb nkab lossis raj.
- Cold Drawing los yog Cold Rolling: Lub extruded los yog pierced yeeb nkab los yog raj undergoes txias ua hauj lwm txheej txheem kom ua tau raws li qhov xav tau qhov ntev thiab nto tiav.
Kev Ua Haujlwm Zoo, Ntawv Pov Thawj, thiab Kev Ntsuas Cov Txheej Txheem:
ASTME SB 729 tau tswj hwm kev ntsuas kev ruaj ntseg zoo thiab cov txheej txheem kuaj xyuas kom ntseeg tau tias kev ncaj ncees thiab kev ua haujlwm ntawm seamless nickel alloy kav thiab raj. Cov kev tswj xyuas kev ua tau zoo muaj xws li:
- Chemical Composition Analysis: Kev tshuaj ntsuam xyuas nruj nruj xyuas kom ua raws li cov txheej txheem sib xyaw ua ke.
- Mechanical Testing: Tensile, yield, and elongation tests assess the mechanical properties of the material.
- Kev Ntsuas Tsis Zoo (NDT): Cov txheej txheem xws li kuaj ultrasonic (UT) thiab kuaj hluav taws xob (RT) kuaj pom qhov tsis xws luag sab hauv thiab saum npoo.
- Dimensional Inspection: Precise dimensional measurements kom ua tau raws li qhov kev cia siab.
- Cov ntawv pov thawj thiab cov ntaub ntawv pov thawj, suav nrog cov ntawv tshaj tawm zeb xeem (MTRs) thiab cov ntaub ntawv pov thawj, tau muab los ua pov thawj kev ua raws li seamless nickel alloy kav thiab cov raj nrog ASTM B729 cov kev cai.
ASTM B729 N08020 Seamless Tubing Daim Ntawv Thov:
- ASTM B729 Seamless npib tsib xee alloy cov kav dej thiab cov raj tswj tau pom cov ntawv thov thoob plaws ntau yam kev lag luam, suav nrog:
- Kev Siv Tshuaj: Corrosion-resistant kav rau tuav cov kua qaub, alkalis, thiab lwm yam tshuaj corrosive.
- Roj thiab Roj: Tubing rau kev siv downhole, pipelines, thiab offshore platforms.
- Fais fab Tsim: Cov cua kub exchanger raj rau high-temperature thiab high-pressure chav tshuab.
- Desalination: Corrosion-resistant raj rau seawater desalination nroj tsuag.
Cov qauv siv:
- ASTM B729 / ASME SB 729 Cov khoom sivhais txog lwm cov qauv ASTM thiab cov kev qhia tshwj xeeb, suav nrog:
- ASTM B829 Cov khoom lag luam: Txuj kev qhia tshwj xeeb rau cov kev cai dav dav rau nickel thiab nickel alloys seamless yeeb nkab thiab raj.
- ASTM E8/E8M: Cov txheej txheem ntsuas kev ntsuas nruj ntawm cov khoom siv hlau.
