Umgangatho we-A335 (I-ASTM A335/ASME S-A335) luphawu lwamazwe ngamazwe lwe-ferritic alloy steel imibhobho yentsimbi engenamthungo esetyenziswa kwindawo yobushushu obuphezulu kunye noxinzelelo oluphezulu. Isetyenziswa kakhulu kwi-petrochemical, amandla (amandla e-thermal/nuclear), kwibhoyila kunye namashishini okucoca. Imibhobho yentsimbi ephantsi kwalo mgangatho inamandla aphezulu obushushu obuphezulu, ukuxhathisa kwe-creep kunye nokumelana nokugqwala, kwaye ifanelekile kwiimeko zokusebenza ezigqithisileyo.
Izinto eziqhelekileyo kunye nokubunjwa kweekhemikhali zomgangatho we-A335
Iimathiriyeli ze-A335 zahlulwa ngamanani "P", kwaye amabanga ahlukeneyo afanele amaqondo obushushu ahlukeneyo kunye nemekobume eyonakalisayo:
| IBanga | Amacandelo eekhemikhali eziphambili | Iimpawu | Ubushushu obusebenzayo |
| A335 P5 | Cr 4-6%, Mo 0.45-0.65% | Ixhathisa kwi-corrosion yesalfure kwaye irhubuluze kumaqondo obushushu aphakathi | ≤650°C |
| A335 P9 | Cr 8-10%, Mo 0.9-1.1% | Inokumelana ne-oxidation yobushushu obuphezulu kwaye nokomelela okuphezulu | ≤650°C |
| A335 P11 | Cr 1.0-1.5%, Mo 0.44-0.65% | Weldability elungileyo kunye namandla obushushu obuphakathi | ≤550°C |
| A335 P12 | Cr 0.8-1.25%, Mo 0.44-0.65% | Ngokufana ne-P11, ukhetho loqoqosho | ≤550°C |
| A335 P22 | Cr 2.0-2.5%, Mo 0.9-1.1% | I-Anti-hydrogen corrosion, esetyenziswa ngokuqhelekileyo kwiibhoyila zesikhululo samandla | ≤600°C |
| A335 P91 | Cr 8-9.5%, Mo 0.85-1.05% | Amandla aphezulu kakhulu, akhethwa kwiiyunithi ezinqabileyo | ≤650°C |
| A335 P92 | P91 + W | Ukumelana nokushisa okuphezulu, okufanelekileyo kwiiyunithi ze-ultra-supercritical | ≤700°C |
Iimeko zesicelo semibhobho yensimbi ye-A335
1. Ishishini lepetrochemical
I-A335 P5 / P9: iiyunithi eziqhekezayo kwi-refineries, i-high-temperature-containing sulfur-containing pipelines.
I-A335 P11 / P12: abatshintshi bobushushu, i-medium-temperature transmission pipelines.
2. Ushishino lwamandla (amandla obushushu/amandla enyukliya)
I-A335 P22: Imibhobho engundoqo yomphunga kunye neentloko zezityalo zamandla ezishushu zemveli.
I-A335 P91/P92: Iiyunithi ze-Supercritical/ultra-supercritical, imibhobho yamandla enyukliya enoxinzelelo oluphezulu.
3. Iibhoyili kunye neenqanawa zoxinzelelo
I-A335 i-P91: Izixhobo zokushisa eziphezulu kwiibhoyili zanamhlanje eziphezulu.
I-A335 P92: Imibhobho yokumelana nobushushu obuphezulu kwiibhoyila eziphezulu zeparamitha.
Indlela yokukhetha izinto ezifanelekileyo ze-A335? Iimfuno zobushushu:
Iimfuno zobushushu:
≤550 ° C: P11/P12
≤650 ° C: P5/P9/P22/P91
≤700°C: P92
Indawo eyonakalisayo:
I-Sulfur-containing medium → P5/P9
Indawo engcolisayo yeHydrogen → P22/P91
Iindleko namandla:
Ukhetho lwezoqoqosho → P11/P12
Iimfuno zamandla aphezulu → P91/P92
Imigangatho elinganayo yamazwe ngamazwe kwimibhobho yentsimbi ye-A335
| A335 | (EN) | (JIS) |
| P11 | 13CrMo4-5 | STPA23 |
| P22 | 10CrMo9-10 | STPA24 |
| P91 | X10CrMoVNb9-1 | I-STPA26 |
FAQ
Q1: Yintoni umahluko phakathi A335 P91 kunye P22?
I-P91: I-chromium ephezulu kunye nomxholo we-molybdenum, ukuxhathisa okunamandla kwi-creep, ilungele iiyunithi eziphezulu.
I-P22: Iindleko eziphantsi, ezifanelekileyo kwiibhoyila zezityalo zamandla zemveli.
I-Q2: Ngaba i-A335 ipayipi yensimbi idinga unyango lobushushu?
I-normalizing + i- tempering treatment iyafuneka, kwaye i-P91/P92 nayo ifuna ulawulo olungqongqo lwezinga lokupholisa.
Q3: Ngaba i-A335 P92 ingcono kune-P91?
I-P92 inokumelana nokushisa okuphezulu (≤700 ° C) ngenxa yobukho be-tungsten (W), kodwa ixabiso liphezulu.
I-A335 i-alloy standard i-alloy ipayipi yensimbi engenamthungo yinto ephambili phantsi kobushushu obuphezulu kunye neemeko zoxinzelelo oluphezulu. Izinto ezahlukeneyo (ezifana neP5, P9, P11, P22, P91, P92) zifanelekile kwiimeko ezahlukeneyo. Xa ukhetha, kuyimfuneko ukuqwalasela ngokubanzi ubushushu, ukubola, amandla kunye neendleko, kwaye ubhekisele kwimigangatho elinganayo yamazwe ngamazwe (efana ne-EN, i-JIS).
Ixesha lokuposa: Jun-06-2025
