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303 stainless hlau phaj 303 stainless hlau coil phaj
Qhov Nto tiav 303 yog ib qho dawb txiav stainless hlau uas muaj leej faj thiab selenium, feem, rau cov ntawv thov uas qhov kev txiav dawb yog feem ntau yuav tsum tau thiab Nto tiav yog siab.303 stainless hlau txhim kho kev ua haujlwm siab thiab kub siab ua haujlwm.Feem ntau haum rau tsis siv neeg lathes, bolts thiab ceev. -
201 Stainless Hlau Phaj 201 stainless hlau coil phaj
201 stainless hlau nrog, polishing tsis muaj npuas, tsis muaj pinhole thiab lwm yam ntxwv, yog tsim los ntawm ntau yam, watchband hauv qab npog cov ntaub ntawv zoo.
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S630 stainless hlau phaj
Stainless hlau phaj muaj du nto, siab plasticity, toughness thiab mechanical zog, thiab yog resistant rau corrosion ntawm acid, alkaline gas, tov thiab lwm yam xov xwm.Nws yog ib hom hlau alloy uas tsis yooj yim rau xeb, tab sis nws tsis yog xeb kiag li.Stainless hlau phaj hais txog cov hlau phaj resistant rau corrosion ntawm tsis muaj zog xov xwm xws li cua, chav thiab dej, thaum acid resistant steel phaj hais txog cov hlau phaj resistant rau corrosion ntawm tshuaj etching xov xwm xws li acid, alkali thiab ntsev.Stainless hlau phaj muaj keeb kwm ntawm ntau tshaj ib puas xyoo txij li thaum nws tau tawm nyob rau hauv thaum ntxov 20th caug xyoo.
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430 stainless hlau phaj 430 stainless hlau kauj
Stainless hlau phaj muaj du nto, siab plasticity, toughness thiab mechanical zog, thiab yog resistant rau corrosion ntawm acid, alkaline gas, tov thiab lwm yam xov xwm.Nws yog ib hom hlau alloy uas tsis yooj yim rau xeb, tab sis nws tsis yog xeb kiag li.Stainless hlau phaj hais txog cov hlau phaj resistant rau corrosion ntawm tsis muaj zog xov xwm xws li cua, chav thiab dej, thaum acid resistant steel phaj hais txog cov hlau phaj resistant rau corrosion ntawm tshuaj etching xov xwm xws li acid, alkali thiab ntsev.Stainless hlau phaj muaj keeb kwm ntawm ntau tshaj ib puas xyoo txij li thaum nws tau tawm nyob rau hauv thaum ntxov 20th caug xyoo.
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42crmo Seamless steel yeeb nkab
Khoom specification:
Sab nraud txoj kab uas hla ntawm cov yeeb nkab steel 20-426
Hlau yeeb nkab phab ntsa thickness ntawm 20-426
Khoom taw qhia:
Lub hom phiaj ntawm 42crmo seamless steel yeeb nkab: tshwj xeeb hlau rau choj yog "42crmo", tshwj xeeb hlau rau tsheb girder yog "42CRmo", tshwj xeeb hlau rau siab nkoj yog "42Crmo".Cov hlau no yog kev vam khom cov ntsiab lus ntawm carbon (C) cov ntsiab lus los txhim kho cov khoom siv ntawm cov hlau, yog li ntawd, raws li cov ntsiab lus carbon ntawm siab thiab qis, cov hlau no tuaj yeem muab faib ua: cov pa roj carbon tsawg - carbon. cov ntsiab lus feem ntau tsawg dua 0.25%, xws li 10, 20 steel, thiab lwm yam;Cov pa roj carbon nruab nrab - cov ntsiab lus carbon feem ntau nyob nruab nrab ntawm 0.25 ~ 0.60%, xws li 35, 45 steel, thiab lwm yam. Cov pa roj carbon ntau - cov ntsiab lus carbon feem ntau ntau dua 0.60%.Xws li cov hlau tsis nquag siv los ua cov kav hlau.
Txheej txheem specification:
Kub ua hauj lwm specification
Cua sov kub 1150 ~ 1200 ° C, pib kub 1130 ~ 1180 ° C, kawg kub> 850 ° C, φ> 50mm, txias txias.
Normalizing specification
Normalizing kub 850 ~ 900 ° C, tawm ntawm qhov cub cua txias.
Kub kub tempering specification
Tempering kub 680 ~ 700 ° C, tawm ntawm qhov cub cua txias.
Specification rau quenching thiab tempering
Preheating kub 680 ~ 700 ° C, quenching kub 840 ~ 880 ° C, roj txias, tempering kub 580 ° C, dej txias los yog roj txias, hardness ≤217HBW.
Specification rau hardening thiab toughening nyob rau hauv - kub quenching
quenching kub 900 ° C, tempering kub 560 ° C, hardness (37 ± 1) HRC
Specification rau induction hardening thiab tempering
quenching kub 900 ° C, tempering kub 150 ~ 180 ° C, hardness 54 ~ 60HRC.
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45 # Seamless Steel Yeeb Nkab
Khoom specification:
Sab nraud txoj kab uas hla ntawm cov yeeb nkab steel 20-426
Hlau yeeb nkab phab ntsa thickness ntawm 20-426
Khoom taw qhia:
Cov khoom siv raw ntawm dov seamless raj yog round tube billet, round tube embryo yog txiav thiab ua tiav los ntawm kev txiav tshuab nrog kev loj hlob ntawm li 1 meter dawb paug, thiab xa mus rau lub cub tawg los ntawm conveyor siv cua sov.Lub billet yog muab tso rau hauv ib lub qhov cub thiab rhuab mus txog 1200 degrees Celsius.Cov roj yog hydrogen lossis acetylene.Kev tswj qhov kub thiab txias hauv qhov cub yog qhov teeb meem tseem ceeb.Tom qab lub round tube billet tawm los, nws yog perforated los ntawm lub siab punch.Feem ntau, feem ntau perforator yog conical yob perforator.Hom perforator no muaj kev ua haujlwm siab, cov khoom lag luam zoo, loj perforating txoj kab uas hla thiab tuaj yeem hnav ntau yam hlau.Tom qab perforation, lub round tube billet yog successively dov los ntawm peb lub siab kab pheeb ces kaum, nruam dov los yog extrusion.Tom qab extrusion, cov yeeb nkab yuav tsum tau muab tshem tawm rau sizing.Lub caliper rotates rau hauv cov hlau embryo los ntawm ib tug conical laum ntawm kev kub ceev mus punch qhov thiab tsim steel kav.Sab hauv txoj kab uas hla ntawm cov yeeb nkab steel yog txiav txim siab los ntawm qhov ntev ntawm lub caliper laum ntsis.Tom qab sizing cov yeeb nkab steel, nws nkag mus rau hauv cov cua txias ntauwd thiab txias los ntawm txau dej.Tom qab txias cov yeeb nkab steel, nws yuav ncaj.Tom qab straightening, cov yeeb nkab steel xa los ntawm txoj siv conveyor mus rau lub tshuab kuaj hlau (los yog hydraulic test) rau kev tshuaj xyuas sab hauv.Yog tias muaj cov kab nrib pleb, npuas thiab lwm yam teeb meem hauv cov yeeb nkab steel, nws yuav raug kuaj pom.Hlau yeeb nkab kev soj ntsuam zoo tom qab kev xaiv tes nruj.Tom qab cov yeeb nkab steel raug tshuaj xyuas, tus naj npawb, specification thiab ntau lawm naj npawb yog txau nrog cov xim.Thiab los ntawm crane mus rau hauv lub warehouse.
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40cr seamless steel yeeb nkab
Khoom specification:
Sab nraud txoj kab uas hla ntawm cov yeeb nkab steel 20-426
Hlau yeeb nkab phab ntsa thickness ntawm 20-426
Steel yeeb nkab txheem:
Raws li tus qauv GB / T 3077-2008: tshuaj muaj pes tsawg leeg (ntau seem, %) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, Cr0.80 ~ 1.10, Ni≤0.30.【Mechanical zog】
Sample blank size (mm): 25
Kev kho cua sov:
Thawj quenching cua sov kub (℃): 850;Coolant: Roj
Qhov thib ob quenching cua sov kub (℃): -
Tempering cua kub (℃): 520;Coolant: dej, roj
Tensile zog (σb / MPa): ≧980
Yield point (σs / MPa): ≧785
Elongation tom qab tawg (δ5 /%): ≧9
Kev txo qis ntawm ntu ntu (ψ/%): ≧45
Kev cuam tshuam kev nqus dej (Aku2 / J): ≧47
Brinell hardness (HBS100/3000) (annealing lossis high-temperature tempering mob): ≦207
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20 # Seamless steel yeeb nkab
Khoom specification:
Sab nraud txoj kab uas hla ntawm cov yeeb nkab steel 20-426
Hlau yeeb nkab phab ntsa thickness ntawm 20-426
20 # seamless steel yeeb nkab yog ua los ntawm 20 # steel, nrog me ntsis siab zog tshaj 15 #, tsis tshua muaj quenched thiab tsis tempering brittleness.Txias deformation plasticity yog siab, feem ntau rau khoov, calendering, dabtsi yog khoov thiab rauj arch processing, welding kev ua tau zoo ntawm arc vuam thiab kev sib cuag vuam yog zoo, roj vuam thickness me me, cov duab ntawm nruj raws li txoj cai los yog complex duab ntawm lub workpiece yog yooj yim tawg. .Machinability txias los yog normalizing lub xeev yog zoo dua li lub xeev annealing, feem ntau yog siv los tsim kev ntxhov siab tsawg thiab siab toughness yuav tsum tau ntawm workpiece.
Cov khoom ntawm 20 # seamless steel yeeb nkab yog: zoo carbon structural steel
Hom Lub Npe: 20 #
Qauv: GB8162-2018
GB/T8163-2018
GB3087-2008
GB9948-2013
GB5310-2017
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Stainless hlau hniav hlau yeeb nkab
Stainless hlau hniav yeeb nkab kuj hu ua stainless hlau welded steel yeeb nkab, uas yog hu ua welded yeeb nkab rau luv luv.Feem ntau, steel lossis steel sawb yog welded rau hauv cov yeeb nkab steel tom qab raug crimped thiab tsim los ntawm chav tsev thiab pwm.Cov txheej txheem ntau lawm ntawm welded steel yeeb nkab yog yooj yim, ntau lawm efficiency yog siab, muaj ntau ntau yam thiab specifications, thiab cov khoom nqi me me, tab sis lub zog dav dav yog qis dua seamless steel yeeb nkab.
Muaj ntau ntau hom stainless hlau kav, tab sis lawv tsuas yog siv rau cov hom phiaj hauv qab no:
1,Classification ntawm stainless hlau kav
1. Kev faib tawm los ntawm txoj kev tsim khoom:
(1) Seamless yeeb nkab - txias drawn yeeb nkab, extruded yeeb nkab, txias dov yeeb nkab.
(2) Welded yeeb nkab:
(a) Raws li cov txheej txheem kev faib tawm - gas shielded vuam yeeb nkab, arc vuam yeeb nkab, tsis kam vuam yeeb nkab (siab zaus, tsawg zaus).
(b) Nws tau muab faib ua cov yeeb nkab ncaj welded thiab kauv welded yeeb nkab raws li qhov vuam.
2. Kev faib tawm raws li seem duab: (1) puag ncig steel yeeb nkab;(2) Rectangular raj.
3. Kev faib tawm los ntawm phab ntsa tuab - nyias phab ntsa steel yeeb nkab, tuab phab ntsa steel yeeb nkab
4. Kev faib tawm los ntawm kev siv: (1) Cov kav dej hauv av tau muab faib ua cov kav dej puag ncig, cov kav dej plaub thiab cov kav paj, uas feem ntau yog siv rau kev kho kom zoo nkauj, kev tsim kho, qauv, thiab lwm yam;
(2) Cov yeeb nkab muaj: steel yeeb nkab rau kev lag luam piping, steel yeeb nkab rau cov kav dej dav dav (dej yeeb nkab), cov khoom siv hluav taws xob / cov dej xa dej, boiler kub pauv yeeb nkab, khoom noj khoom haus yeeb nkab, thiab lwm yam. Nws yog dav siv hauv ntau yam kev lag luam , xws li petrochemical, ntawv, nuclear zog, zaub mov, dej haus, tshuaj thiab lwm yam kev lag luam uas yuav tsum tau siab rau cov kua nruab nrab.
2,Seamless steel yeeb nkab
Stainless hlau seamless yeeb nkab yog ib hom hlau ntev nrog hollow seem thiab tsis muaj pob qij txha nyob ib ncig ntawm.
1. Kev tsim cov txheej txheem thiab ntws ntawm seamless steel yeeb nkab:
Smelting>ingot> steel dov> sawing>peeling>piercing>annealing>pickling> tshauv loading> txias kos> taub hau txiav> pickling>warehousing
2. Nta ntawm seamless steel yeeb nkab:
Nws tsis yog qhov nyuaj kom pom los ntawm cov txheej txheem saum toj no ntws: ua ntej, qhov tuab ntawm phab ntsa thickness ntawm cov khoom, qhov kev lag luam ntau dua thiab siv tau.Lub thinner phab ntsa thickness, ntau dua tus nqi ua yuav;Qhov thib ob, cov txheej txheem ntawm cov khoom txiav txim siab nws cov kev txwv.Feem ntau, qhov precision ntawm seamless steel yeeb nkab yog tsawg: tsis sib luag phab ntsa thickness, tsis tshua muaj brightness ntawm lub nto sab hauv thiab sab nraum cov yeeb nkab, siab sizing nqi, thiab muaj pits thiab dub me ntsis nyob rau saum npoo sab hauv thiab sab nraum cov yeeb nkab, uas yog nyuaj rau. tshem tawm;Thib peb, nws qhov kev tshawb nrhiav thiab kev tsim kho yuav tsum ua tiav offline.Yog li ntawd, nws muaj nws qhov zoo hauv kev kub siab, siab zog thiab cov khoom siv kho tshuab.
3,Welded steel yeeb nkab
304 stainless hlau hniav zoo nkauj raj
304 stainless hlau hniav zoo nkauj raj
Welded steel yeeb nkab, hu ua welded yeeb nkab rau luv luv, yog stainless hlau yeeb nkab welded los ntawm steel phaj los yog steel sawb tom qab raug crimped thiab tsim los ntawm lub tshuab teeb thiab pwm.
1. Steel phaj>Splitting>Forming>Fusion vuam>Induction kaj tshav kub kho>Internal thiab sab nraud weld hlaws kho mob>Sshaping>Sizing>Eddy tam sim no kuaj>Laser txoj kab uas hla ntsuas>Pickling>Warehousing
2. Nta ntawm welded steel yeeb nkab:
Nws tsis yog qhov nyuaj kom pom los ntawm cov txheej txheem saum toj no ntws: ua ntej, cov khoom tsim tawm tsis tu ncua thiab hauv online.Qhov tuab ntawm phab ntsa tuab, qhov peev txheej ntau dua nyob rau hauv chav tsev thiab cov khoom siv vuam, thiab kev siv nyiaj tsawg dua thiab siv tau.Lub thinner phab ntsa, qhov qis nws cov tswv yim-tso zis piv yuav yog;Qhov thib ob, cov txheej txheem ntawm cov khoom txiav txim siab nws qhov zoo thiab qhov tsis zoo.Feem ntau, cov welded steel yeeb nkab muaj qhov ua tau zoo, cov phab ntsa tuab, siab sab hauv thiab sab nraud ntawm cov yeeb nkab steel yeeb nkab fittings (cov yeeb nkab steel qhov ci ntsa iab txiav txim siab los ntawm qib ntawm cov hlau phaj), thiab tuaj yeem ua qhov loj me.Yog li ntawd, nws embodies nws kev lag luam thiab kev zoo nkauj nyob rau hauv daim ntawv thov ntawm high-precision, nruab nrab-tso siab kua.
Muaj chlorine ion nyob rau hauv ib puag ncig siv.Cov tshuaj chlorine muaj nyob thoob plaws, xws li ntsev, hws, dej hiav txwv, hiav txwv cua, av, thiab lwm yam. Stainless hlau corrodes sai heev nyob rau hauv lub xub ntiag ntawm chloride ions, txawm surpassing zoo tib yam uas tsis muaj carbon hlau.Yog li ntawd, muaj cov kev cai rau kev siv ib puag ncig ntawm stainless hlau, thiab nws yog ib qho tsim nyog yuav tsum tau so tsis tu ncua kom tshem tawm cov plua plav thiab ua kom nws huv si thiab qhuav.
316 thiab 317 stainless hlau (saib hauv qab no rau cov khoom ntawm 317 stainless hlau) yog molybdenum uas muaj stainless hlau.Cov ntsiab lus molybdenum hauv 317 stainless hlau yog me ntsis siab dua li ntawm 316 stainless hlau.Vim tias molybdenum nyob rau hauv cov hlau, tag nrho cov kev ua tau zoo ntawm cov hlau no zoo dua li 310 thiab 304 stainless hlau.Nyob rau hauv qhov kub thiab txias, thaum lub concentration ntawm sulfuric acid qis dua 15% thiab siab dua 85%, 316 stainless hlau muaj ntau yam kev siv.316 stainless hlau kuj muaj cov tshuaj chloride zoo corrosion, yog li nws feem ntau yog siv rau hauv marine ib puag ncig.Nrog rau txoj kev loj hlob ntawm kev lag luam kev lag luam, daim ntawv thov ntawm cov yeeb nkab steel hlau kuj tau nrov dua thiab ntau dua.Nws yuav coj cov kev hloov tshiab hauv txhua qhov chaw.
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316 stainless hlau yeeb nkab
Cov hlau siv hauv roj av, tshuaj lom neeg, kev kho mob, zaub mov thiab kev lag luam teeb
316 stainless hlau yeeb nkab yog ib hom hollow ntev round steel, uas yog dav siv nyob rau hauv roj, tshuaj, kev kho mob, khoom noj khoom haus, lub teeb kev lag luam, mechanical instruments thiab lwm yam industrial transmission pipelines thiab mechanical structural Cheebtsam.Tsis tas li ntawd, thaum khoov thiab torsional lub zog zoo ib yam, qhov hnyav kuj yog lub teeb, yog li nws kuj tau siv dav los tsim cov khoom siv kho tshuab thiab cov qauv engineering.Nws kuj yog siv los tsim ntau yam riam phom, chim, plhaub, thiab lwm yam.
Qhov siab tshaj plaws carbon ntsiab lus ntawm 316 stainless hlau yeeb nkab yog 0.03, uas yuav siv tau nyob rau hauv daim ntawv thov uas annealing tsis pub tom qab vuam thiab siab tshaj corrosion kuj yuav tsum tau.
316 thiab 317 stainless hlau (saib hauv qab no rau cov khoom ntawm 317 stainless hlau) yog molybdenum uas muaj stainless hlau.
Tag nrho cov kev ua tau zoo ntawm cov hlau no zoo dua li 310 thiab 304 stainless hlau.Thaum qhov kub thiab txias, thaum cov concentration ntawm sulfuric acid qis dua 15% thiab siab dua 85%, 316 stainless hlau muaj ntau yam kev siv.
316 stainless hlau phaj, tseem hu ua 00Cr17Ni14Mo2, corrosion kuj:
Qhov kev tiv thaiv corrosion yog zoo dua li 304 stainless hlau, thiab nws muaj qhov zoo corrosion kuj nyob rau hauv cov txheej txheem ntawm cov pulp thiab ntawv.
Carbide nag lossis daus tsis kam ntawm 316 stainless hlau yog zoo dua li ntawm 304 stainless hlau, thiab qhov kub thiab txias saum toj no tuaj yeem siv tau.
Ntau yam: 316 stainless hlau raj, 316 stainless hlau ci raj, 316 stainless hlau hniav raj, 316 stainless hlau capillary hlab, 316 stainless hlau welded hlab, 304 stainless hlau raj.
Qhov siab tshaj plaws carbon ntsiab lus ntawm 316L stainless hlau yeeb nkab yog 0.03, uas yuav siv tau nyob rau hauv daim ntawv thov uas annealing tsis pub tom qab vuam thiab siab tshaj corrosion kuj yuav tsum tau.
5 Corrosion kuj
11 316 stainless hlau tsis tuaj yeem hardened los ntawm overheating.
12 Vuam
13 Hom kev siv: cov khoom siv rau cov ntaub so ntswg thiab cov ntawv ua, cov khoom siv hluav taws xob sib hloov, cov khoom siv dyeing, cov khoom siv ua yeeb yaj kiab, cov kav dej, cov khoom siv rau sab nrauv ntawm cov tsev nyob hauv ntug dej hiav txwv.
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304 stainless hlau yeeb nkab
Yield zog (N / mm2)≥205
Tensile zog≥520
Elongation (%)≥40
Hardness HB≤187 PAB≤90 hwv≤200
Qhov hnyav 7.93 g· cm-3
Cov cua sov tshwj xeeb c (20℃0.502 J· (g · C) – 1
Thermal conductivityλ/ W (m· ℃) - 1 (ntawm qhov kub thiab txias /℃)
20 100 500 12.1 16.3 21.4
Coefficient ntawm linear expansionα/ (10-6/℃) (nruab nrab ntawm qhov kub thiab txias /℃)
20～10020～200 20～300 20～400
16.0 16.8 17.5 18.1 ib
Kev tiv thaiv 0.73Ω ·mm2 ua· m-1
Melting point 1398-1420℃
Raws li cov hlau tsis huv thiab kub-resistant, 304 steel yeeb nkab yog cov khoom siv dav tshaj plaws rau cov khoom noj, cov khoom siv tshuaj lom neeg thiab kev lag luam atomic zog.
304 steel yeeb nkab yog ib hom universal stainless hlau yeeb nkab, uas yog dav siv los ua cov cuab yeej thiab cov khoom uas xav tau kev ua haujlwm zoo (corrosion resistance and formability).
304 steel yeeb nkab muaj xeb zoo heev thiab corrosion kuj thiab zoo intergranular corrosion kuj.
304 steel yeeb nkab khoom muaj zog corrosion kuj nyob rau hauv nitric acid hauv qab kub kub nrog concentration≤65%.Nws kuj muaj qhov zoo corrosion kuj rau alkali tov thiab feem ntau cov organic thiab inorganic acids.Ib hom hlau alloy siab uas tuaj yeem tiv taus corrosion hauv huab cua lossis hauv cov tshuaj corrosion nruab nrab.Stainless hlau yog ib hom hlau uas muaj qhov zoo nkauj thiab zoo corrosion kuj.Nws tsis tas yuav tau txais kev kho deg xws li xim plating, tab sis muab kev ua si tag nrho rau lub hauv paus ntawm cov khoom ntawm stainless hlau.Nws yog siv ntau yam ntawm cov hlau, feem ntau hu ua stainless hlau.High alloy steels xws li 13 chromium steel thiab 18-8 chromium-nickel steel yog cov sawv cev ntawm cov khoom.
Raws li cov hlau tsis huv thiab kub-resistant, 304 steel yeeb nkab yog cov khoom siv dav tshaj plaws rau cov khoom noj, cov khoom siv tshuaj lom neeg thiab kev lag luam atomic zog.
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201 stainless hlau yeeb nkab
Kev kos duab
201 stainless hlau yeeb nkab - S20100 (AISI. ASTM)
Lub koom haum American Iron thiab Steel siv peb tus lej los kos ntau yam qauv qib malleable stainless hlau pem teb.Xws li:
①Austenitic stainless hlau yog cim nrog 200 thiab 300 series ntawm tus lej;
②Ferritic thiab martensitic stainless hlau yog sawv cev los ntawm 400 series tooj.
Piv txwv li, qee cov austenitic stainless hlau yog cim nrog 201, 304, 316 thiab 310, ferritic stainless hlau yog cim nrog 430 thiab 446, martensitic stainless hlau yog cim nrog 410, 420 thiab 440C, thiab duplex (austenitic-ferritic) stainless hlau. , nag lossis daus hardening stainless steels, thiab siab alloys nrog hlau ntsiab lus tsawg tshaj li 50% feem ntau yog patented los yog trademarked.
Lub hom phiaj kev ua haujlwm
201 stainless hlau raj muaj cov yam ntxwv ntawm acid tsis kam, alkali tsis kam, siab ceev thiab tsis muaj pinhole.Nws yog siv los tsim ntau yam ntaub ntawv zoo xws li rooj plaub thiab hauv qab ntawm lub watch band.201 stainless hlau yeeb nkab tuaj yeem siv rau hauv cov yeeb nkab zoo nkauj, cov yeeb nkab muaj thiab qee cov khoom siv ntiav.Lub cev muaj zog ntawm 201 stainless hlau yeeb nkab
1. Elongation: 60 mus rau 80%
2. Tensile nruj: 100000 rau 180000 psi
3. Elastic modulus: 29000000 psi
4. Yield hardness: 50000 rau 150000 psi
A.Round steel npaj;B. Cua sov;C. Kub dov perforation;D. Lub taub hau txiav;E. Pickling;F. Sib tsoo;G. Lubrication;H. Txias dov;I. Degreasing;J. Kev kho cua sov;K. Ncaj nraim;L. Yeeb nkab txiav;M. Pickling;N. Kev tshuaj xyuas cov khoom tiav.
