ASTM A387 Qib 5 Qib 2 (tseem hu ua ASME SA 387 Qib 5 Chav Kawm 2) yog siab -chromium zoo-molybdenum alloy steel phaj tsim los siv rau hauv cov welded boilers thiab cov hlab ntsha siab ua haujlwm ntawm qhov kub siab.
Txheem Specification Rau ASTM A387 Gr.5 Chav Kawm 2 Alloy Steel Phaj
Kev qhia tshwj xeeb: ASTM A387 / ASME SA387
Txuj: ASTM, ASME thiab API
Thickness: 5mm-150mm
Tshwj xeeb: Sheet Sheet, Perforated Sheet, BQ Profile.
Daim ntawv: Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Checkered Phaj, Strip, Flats, Blank (Vaj Huam Sib Luag), Nplhaib (Flange)
Tiav: Kub dov phaj (HR), Cold Rolled Sheet (CR), 2B, 2D, BA NO (8), SATIN (Met with Plastic Coated)
Hardness: Mos, Hard, Ib nrab Hard, Quarter Hard, Spring Hard thiab lwm yam.
Qib sib npaug Alloy Steel ASTM A387 Qib 5 Chav Kawm 2 Phaj
| QIB | UNS NO | DIN | GOST | EN |
| Gr5 Chav 2 | S50200 | - | 15 KH5M | X12CrMo5 |
Tshuaj muaj pes tsawg leeg ntawm ASTM A387 Gr.5 Chav Kawm 2 Alloy Steel Phaj
| Qib | C | Mn | P | S | Si | Cr | Mo |
| gr 5 | 0.15 max. | 0.25 - 0.66 | 0.035 | 0.030 | 0.55 max. | 0.40 - 0.7 | 3.9 - 6.1 |
Mechanical Properties of Alloy Steel Qib 5 Chav Kawm 2 Phaj
| Tensile zog | Yield zog | Elongationin 50mm (%) | Txo thaj tsam hauv% |
| 75-100 ksi, 515-690 MPa | 45 Ksi, 310 MPa | 18 | 45 |
Tensile Requirements rau Alloy Steel Qib 5 Chav Kawm 2 Phaj
| Lub npe: | Yuav tsum tau: | Qib 5 |
|
A387 Qib 5 |
Tensile zog, ksi [MPA] | 75 txog 100 [515 rau 690] |
| Yield zog, min, ksi [MPa] / (0.2% offset) | 45 [310] | |
| Elongation hauv 8 nti. [200mm], min % | ... | |
| Elongation hauv 2 nti. [50mm], min, % | 18 | |
| Txo thaj tsam, min% | 45 ( ntsuas ntawm cov qauv puag ncig) 40 ( ntsuas ntawm cov qauv tiaj tus) |
Qhov ntau thiab tsawg ntawm ASTM A387 Qib 5 Chav Kawm 2 Phaj
| Loj (inches) | Loj (mm) |
| .125" | 3.18mm ib |
| .134" | 3.40mm ib |
| .156" | 3, 96mm |
| .187" | 4.75mm ib |
| .250" | 6.35mm ib |
| .312" | 7.92mm ib |
| .375" | 9 ,53mm |
| .500" | 12.7mm ib |
| .600" | 15.9mm ib |
| .750" | 19.1mm ib |
| .875" | 22.2mm ib |
| 1" | 25.4mm ib |
| 1.125" | 28.6mm ib |
| 1.250" | 31.8mm ib |
| 1.500" | 38.1mm ib |
| 1.750" | 44.5mm ib |
| 2" | 50.8mm ib |
| 2.500" | 6 3,5mm |
| 3" | 76.2mm ib |
Kev ua haujlwm
1. Kev kho cua sov thawj zaug (Qhov tseem ceeb rau chav kawm 2)
Raws li 2026 kev xav tau, cov khoom siv kho tshuab ntawm Chav Kawm 2 tau ua tiav los ntawm kev tswj xyuas thermal:
Normalizing: Ua kom sov cov phiaj rau qhov kub thiab txias hauv huab cua kom ua kom cov txheej txheem nplej.
Tempering: Reheating rau qhov tsawg kawg nkaus kub ntawm 1300℃F [705 degree]. Qhov no txo cov kev ntxhov siab sab hauv thiab ua tiav lub zog tensile tshwj xeeb ntawm 75-100 ksi.
Accelerated Cooling: Yog hais tias tau teev tseg, kua quenching ua raws li tempering yog siv los txhim kho toughness nyob rau hauv thicker daim hlau.
2. Mechanical Processing (Fabrication)
Kub Rolling: Cov txheej txheem ntawm kev txo cov hlau tuab thaum tswj kev kub siab kom ntseeg tau tias cov khoom sib txawv ntawm cov alloy.
Ntug Kev Npaj: Beveling lossis machining phaj npoo kom ntseeg tau tias haum zoo -nce thiab nkag mus thaum lub vuam theem.
Cold/Hot forming: Shaping the plates into "shells" or "heads" for pressure vessels siv hydraulic presses los yog rollers.
3. Vuam & Thermal Conditioning
Preheating: Qhov tseem ceeb rau Qib 5 (5% Cr) kom txo tau qhov kev pheej hmoo ntawm hydrogen -induced cracking thaum vuam.
Tom qab- Weld Heat Treatment (PWHT): Ib lub voj voog uas yuav tsum tau ua tom qab vuam kom rov ua kom cov ductility thiab txo cov tawv tawv hauv Heat Afected Zone (HAZ).
Simulated PWHT (SPWHT): Cov txheej txheem kev sim uas cov qauv raug xa mus rau lub voj voog hluav taws xob ntxiv los kwv yees qhov kawg ntawm cov khoom siv ntawm lub nkoj tiav.
4. Nto & Kev Ua Haujlwm Zoo
Kev Txhaum Txhaum Cai: Tshem tawm cov nplai zeb los muab qhov chaw huv si rau kev tshuaj xyuas thiab txheej.
Pickling thiab Passivation: Tshuaj ntxuav kom txhim khu cov chromium - oxide tiv thaiv txheej kom zoo dua corrosion.
Nqus Degassing: Cov txheej txheem ua kom zoo thaum lub sij hawm melting kom tshem tawm cov pa phem xws li hydrogen thiab oxygen.
5. Kev Tshawb Fawb & Kev Tshawb Fawb
Tsis yog-Kev Ntsuam Xyuas Kev Puas Tsuaj (NDT): suav nrog Kev Ntsuas Ultrasonic (UT) rau qhov tsis zoo sab hauv thiab Kev Tshuaj Xyuas Sib Nqus Particle (MPI) rau qhov tawg.
Charpy V-Kev Ntsuas Qhov Ntsuas: Ntsuas cov khoom siv tawv ntawm qhov kub thiab txias.
Kev txheeb xyuas cov khoom zoo (PMI): Txheeb xyuas 5% Chromium thiab 0.5% Molybdenum cov ntsiab lus ua ntej xa khoom.
Vim li cas thiaj xaiv peb:
Koj tuaj yeem tau txais cov khoom zoo meej raws li qhov koj xav tau ntawm tus nqi tsawg kawg nkaus.
Peb kuj muab Reworks, FOB, CFR, CIF, thiab qhov rooj rau qhov rooj tus nqi xa khoom. Peb xav kom koj ua deal rau shipping uas yuav zoo heev.
Cov ntaub ntawv uas peb muab yog muaj tseeb tiag, txoj cai los ntawm raw cov ntaub ntawv xeem daim ntawv pov thawj mus rau qhov kawg dimensional nqe lus.
Peb lav muab cov lus teb tsis pub dhau 24 teev (feem ntau hauv tib lub sijhawm)
Koj tuaj yeem tau txais cov khoom hloov pauv, zeb xa khoom nrog txo lub sijhawm tsim khoom.
Peb tau mob siab rau peb cov neeg siv khoom. Yog tias nws yuav tsis tuaj yeem ua tau raws li koj cov kev xav tau tom qab kuaj xyuas tag nrho cov kev xaiv, peb yuav tsis ntxias koj los ntawm kev cog lus tsis tseeb uas yuav tsim kev sib raug zoo rau cov neeg siv khoom.
Yog tias koj muaj qhov yuav tsum tau ua rau A387 Qib 5 Chav Kawm 2, peb txais tos koj nug. GNEE tuav cov khoom lag luam loj uas feem ntau siv cov qib siab zog steel rau koj xaiv.Rau cov ncauj lus kom ntxaws txhua yam khoom, tshuaj lom neeg muaj pes tsawg leeg, thiab cov ntaub ntawv kev, nrog rau cov qauv dawb, thov hu rau peb lub Hoobkas tam sim ntawd. Peb muab cov nqi sib tw, ruaj khov zoo, thiab kev pabcuam tshaj lij. Email: beam@gneesteelgroup.com.
Cov qauv dab tsi tswj kev xeem ntawm ASTM A387 Qib 5 Chav Kawm 2?
Kev ntsuam xyuas ntawm ASTM A387 Qib 5 Chav Kawm 2 yog tswj hwm los ntawm ASTM cov qauv, suav nrog kev ntsuas tensile, khoov, thiab kev ntsuas cuam tshuam. Cov kev xav tau ntxiv yuav raug teev los ntawm ASME Boiler thiab Pressure Vessel Code thaum siv hauv kev tsim cov hlab ntsha uas tau lees paub.
Dab tsi yog qhov ceev ntawm ASTM A387 Qib 5 Chav Kawm 2?
Qhov ceev ntawm ASTM A387 Qib 5 Chav Kawm 2 yog kwv yees li 0.284 lb/in³, zoo ib yam li lwm cov pa roj carbon thiab qis - alloy steels. Qhov ntom ntom no yog siv los ntsuas qhov hnyav rau cov khoom siv ntawm lub nkoj siab thiab cov qauv tsim.
Dab tsi yog qhov txawv ntawm ASTM A387 Qib 5 Chav Kawm 2 thiab ASTM A387 Qib 22?
ASTM A387 Qib 5 Chav Kawm 2 muaj cov ntsiab lus qis dua piv rau Qib 22, uas muaj cov chromium thiab molybdenum ntau dua. Qib 22 muaj lub zog nkag siab zoo dua thiab siv rau hauv qhov hnyav dua siab dua - qhov kub thiab txias, thaum Qib 5 Chav Kawm 2 yog siv hauv cov kev pabcuam thermal tsawg dua.
ASTM A387 Qib 5 Qib 2 piv rau ASTM A387 Qib 91 li cas?
ASTM A387 Qib 5 Qib 2 muaj chromium thiab molybdenum qis dua qib 91, siab -lub zog ferritic alloy steel. Qib 91 muab kev nkag siab zoo heev ntawm qhov kub thiab txias, thaum Qib 5 Chav Kawm 2 yog qhov tsim nyog rau kev nce siab hauv nruab nrab - qhov kub siab ntawm cov hlab ntsha.
Dab tsi yog qhov modulus ntawm elasticity ntawm ASTM A387 Qib 5 Chav Kawm 2?
Lub modulus ntawm elasticity rau ASTM A387 Qib 5 Chav Kawm 2 yog hais txog 29,000 ksi ntawm chav tsev kub. Tus nqi no yog ib qho zoo rau cov pa roj carbon thiab qis- alloy steels thiab yog siv rau hauv cov qauv tsim thiab lub siab lub nkoj tsim xam.
Dab tsi yog qhov coefficient ntawm thermal expansion rau ASTM A387 Qib 5 Chav Kawm 2?
ASTM A387 Qib 5 Chav Kawm 2 muaj cov coefficient ntawm thermal expansion zoo ib yam li lwm yam qis- alloy steels, kwv yees li 6.5 × 10⁻⁶ ib℃F ntawm 70℃F thiab 600℃F. Cov cuab yeej no tseem ceeb rau kev tsim cov khoom siv thermal cycling.
Dab tsi yog qhov thermal conductivity ntawm ASTM A387 Qib 5 Chav Kawm 2?
Lub thermal conductivity ntawm ASTM A387 Qib 5 Chav Kawm 2 yog nyob ib ncig ntawm 25 Btu / (hr·ft·℃F) ntawm chav tsev kub, txo qis me ntsis ntawm qhov kub siab dua. Cov cuab yeej no cuam tshuam rau kev hloov pauv hluav taws xob hauv boilers thiab cov khoom siv hluav taws xob.
Dab tsi ncej-weld kev kho cua sov yuav tsum tau rau ASTM A387 Qib 5 Chav Kawm 2?
Tom qab-weld kho cua sov rau ASTM A387 Qib 5 Chav Kawm 2 feem ntau cuam tshuam nrog qhov kub thiab txias ntawm 1100℃F thiab 1200℃F. Qhov no txo qis qhov seem seem, txhim kho toughness, thiab kho cov khoom siv kho tshuab tom qab vuam.
Dab tsi yog qhov hluav taws xob tiv thaiv ntawm ASTM A387 Qib 5 Chav Kawm 2?
ASTM A387 Qib 5 Chav Kawm 2 muaj hluav taws xob tiv thaiv zoo ib yam li lwm yam qis- alloy steels, kwv yees li 20 × 10⁻⁸ ohm-meters ntawm chav tsev kub. Cov cuab yeej no feem ntau tsis yog thawj qhov kev txiav txim siab rau nws cov kev siv lub nkoj siab.
ASTM A387 Qib 5 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 5 Chav Kawm 2 daim hlau yuav tsum muab cia rau hauv qhov chaw qhuav, npog kom tsis txhob xeb. Lawv yuav tsum tau ua tib zoo saib xyuas kom tsis txhob muaj kev puas tsuaj rau saum npoo, thiab cov cuab yeej nqa tau zoo yuav tsum tau siv los tiv thaiv kev khoov lossis deformation. Cov phaj yuav tsum tau tshuaj xyuas ua ntej fabrication kom paub meej tias lawv ua tau raws li cov kev cai tshwj xeeb.