A333 Gr 8 LTCS steel yeeb nkab
Dec 05, 2025
ASTM A333 Qib 8 qis-kub kav dej piav qhia
covASTM A333 Gr.8 Seamless Yeeb Nkabyog cov khoom siv dav siv nyob rau hauv qis - qhov kub thiab txias. Feem ntau yog tsim los ntawmsiab- zoo carbon lossis qis- hlau alloydhaukub dov lossis txias txheej txheem, nws tswj kev ua haujlwm ruaj khov nyob rau hauv huab cua kub xws li-45 ° C rau -196 ° C. Cov yeeb nkab no yog qhov tseem ceeb rau:
Cryogenic siab hlab ntsha
Thaum tshav kub kub exchangers
Petrochemical khoom
Natural gas processing chaw
ASTM A333 Qib 8 LTCS yeeb nkab specification
Tshuaj muaj pes tsawg leeg
Element | Qib 8 |
| Carbon, max | 0.13 |
| Manganese | 0.90 max |
| Phosphorus, max | 0.025 |
| Sulphur, max | 0.025 |
| Silicon | 0.13-0.32 |
| Nickel | 8.40-9.60 |
| Chromium | -- |
| Tooj | -- |
| Aluminium | -- |
| Vanadium, max | -- |
| Columbium, max | -- |
| Molybdenum, max | -- |
Tensile Requirement
Qib 8 | ||
psi | MPa | |
| Tensile zog Min | 100 000 | 690 |
| Yield zog Min | 75 000 | 515 |
| Ntev | Hloov | |
| Elongation hauv 2 hauv lossis 50 hli (lossis 4D), min, % | ||
| Basic yam tsawg kawg nkaus elongation rau phab ntsa 5/16 nyob rau hauv. [8mm] thiab tshaj nyob rau hauv thickness, strip xeem, thiab rau tag nrho cov me me xeem nyob rau hauv tag nrho seem. | 22 | -- |
| Thaum tus qauv puag ncig 2-hauv, los yog 50-mm gage ntev los yog proportionally me me kuaj cov qauv nrog lub gage ntev sib npaug rau 4D (4 npaug ntawm txoj kab uas hla) yog siv. | 16 | -- |
| Rau kev ntsuam xyuas sawb, txiav tawm rau txhua 1/32 hauv [0.8 mm] txo cov phab ntsa tuab hauv qab 5/16 hauv [8 mm] los ntawm qhov yooj yim elongation ntawm cov feem pua ntawm cov hauv qab no | 1.25 | -- |
Elongation hauv 2 hauv lossis 50 mm, min, %
Phab ntsa Thickness | Qib 8 | ||
hauv | mm | Ntev | Hloov |
| 5/16 (0.312) | 8 | 22 | -- |
| 9/32 (0.281) | 7.2 | 21 | -- |
| 1/4 (0.250) | 6.4 | 20 | -- |
| 7/32 (0.219) | 5.6 | 18 | -- |
| 3/16 (0.188) | 4.8 | 17 | -- |
| 5/32 (0.156) | 4 | 16 | -- |
| 1/8 (0.125) | 3.2 | 15 | -- |
| 3/32 (0.094) | 2.4 | 13 | -- |
| 1/16 (0.062) | 1.6 | 12 | -- |
Cov kev xav tau cuam tshuam
Qhov loj ntawm Specimen | Yam tsawg kawg nkaus nruab nrab Notched Bar cuam tshuam tus nqi ntawm txhua pawg ntawm peb tus qauv | Yam tsawg kawg nkaus Notched Bar cuam tshuam tus nqi ntawm ib qho piv txwv nkaus xwb | ||
ft-lbf ib | J | ft-lbf ib | J | |
| 10 ua 10 | 13 | 18 | 10 | 14 |
| 10 ua 7,5 | 10 | 14 | 8 | 11 |
| 10,67 ua | 9 | 12 | 7 | 9 |
| 10 ua 5 | 7 | 9 | 5 | 7 |
| 10 ua 3.33 | 5 | 7 | 3 | 4 |
| 10 ua 2.5 | 4 | 5 | 3 | 4 |
| Txoj kab ncaj nraim interpolation rau cov nqi nruab nrab yog tso cai. | ||||
A333 GR8 VS A333 GR6
| covParametercov | covA333 GR8cov | covA333 GR 6cov |
|---|---|---|
| covTsim Temp.cov | cov-196 ° C(Liquid N₂/LNG) | cov-45 ° C ~ -101 ° C(Ethylene / propylene) |
| covCov ntsiab lus Nickelcov | cov3.18-3.82%(High -Ni Alloy) | cov≤ 0.040%(Ni-Free, V-Microalloyed) |
| covImpact Toughnesscov | ≥20J @ -196 ° C | ≥18J @ -45 ° C |
| covTensile zogcov | ≥415 MPa | ≥415 MPa |
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