ASTM A387 Qib 11 Chav Kawm 2yog chromium-molybdenum alloy steel phaj uas tau teev tseg los ntawm ASTM A387/A387M, tsim los rau siab - kub, siab -siab siab- cov khoom siv bearing, nrog zoo heev tiv thaiv hydrogen corrosion, sulfide kev nyuaj siab tawg thiab creep deformation.
Sib npaug
| BS | EN | ASTM / ASME Cov | DIN |
| 621 B | ––– | A387-11-2 | ––– |
Specifications rau ASTM A387 Qib 11 Alloy Steel Phaj
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| A387 Qib 11 | 1.25% | 0.50% |
Tensile Requirements rau ASTM A387 Qib 11 Alloy Steel Phaj Class 2 Phaj
| Lub npe: | Yuav tsum tau: | Qib 11 |
| A387 Qib 11 | Tensile zog, ksi [MPa] | 75 txog 100 [515 rau 690] |
| Yield zog, min, ksi [MPa] / (0.2% offset) | 43 [310] | |
| Elongation hauv 8 nti. [200mm], min % | 18 | |
| Elongation hauv 2 nti [50mm], min, % | 22 | |
| Txo thaj tsam, min% | ––– |
Cov Khoom Siv Tshuaj Rau ASTM A387 Qib 11 Alloy Steel Phaj
| Element | Chemical Composition (%) | |
| A387 Qib 11 | ||
| Cov pa roj carbon: | Kev Ntsuas Kub: | 0.05 - 0.17 |
| Product Analysis: | 0.04 - 0.17 | |
| Manganese: | Kev Ntsuas Kub: | 0.40 - 0.65 |
| Product Analysis: | 0.35 - 0.73 | |
| Phosphorus: | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulfur (max): | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Kev Ntsuas Kub: | 0.50 - 0.80 |
| Product Analysis: | 0.44 - 0.86 | |
| Chromium: | Kev Ntsuas Kub: | 1.00 - 1.50 |
| Product Analysis: | 0.94 - 1.56 | |
| Molybdenum: | Kev Ntsuas Kub: | 0.45 - 0.65 |
| Product Analysis: | 0.45 - 0.70 |
Cov ntawv thov tseem ceeb
Roj & Roj Kev Lag Luam: Refineries, petrochemical nroj tsuag, cov kev pabcuam roj qaub, thiab siab - cov kav dej kub uas tiv thaiv hydrogen sulfide corrosion, siab siab, thiab cyclic thermal stress nyob rau hauv hnyav, ntev - lub sijhawm ua haujlwm ib puag ncig.
Lub zog tiam: Boiler nruas, headers, thiab siab -kub chav piping nyob rau hauv thermal thiab ua ke- voj voog fais fab nroj tsuag, ua kom muaj kev ruaj ntseg nyob rau hauv huab cua siab thiab tshav kub loads.
Kev ua tshuaj lom neeg: Cov khoom siv hauv cov chaw tuav cov dej kub, corrosive thiab gases, yoog mus rau qhov kub siab mus tas li -kub cov tshuaj tiv thaiv thiab kev tawm tsam tshuaj lom neeg.
Kub Exchangers & Boilers: Cov khoom tseem ceeb uas yuav tsum tau muaj kev ntseeg siab rau cov cua sov thiab corrosion, haum rau hnyav -lub luag haujlwm thermal hloov hluav taws xob hla ntau qhov chaw lag luam.
Thov kev tshaj lij rau ASTM A387 Qib 11 Chav Kawm 2 los ntawm GNEE Steel.
A387 Qib 11 CL 1 thiab CL 2 txawv li cas?
CL 2 raug quenching-tempering (los yog sib npaug) kev kho cua sov, nrog lub zog tensile ntau dua (515-}690 MPa) thiab lub zog tawm los (Ntau dua lossis sib npaug rau 310 MPa); CL 1 yog normalized, tsom rau kev ruaj ntseg rau cov xwm txheej kub kub.
Dab tsi yog cov khoom tseem ceeb ntawm A387 Qib 11 CL 2?
Tensile zog: 515-690 MPa; Yam tsawg kawg yield zog: 310 MPa; Tsawg kawg elongation (50mm): 22%; Hardness: 163-235 HB; Lub zog cuam tshuam (ntawm -20 degree): Ntau dua lossis sib npaug rau 60 J.
Kev kho cua sov dab tsi yuav tsum tau ua rau A387 Qib 11 CL 2?
Nws yog muab tom qab normalizing + tempering (los yog normalizing + ceev txias + tempering), nrog ib tug tsawg kawg nkaus tempering kub ntawm 620 degree, los txhim kho nws txhua yam muaj zog thiab toughness.