ASTM A693 Hom 630 17-4 PH Phaj

1. Thickness: 0.1 hli - 150mm
2.Width: 1000 - 3300 hli
3.Length: 1000 - 12000 hli
4.Equivalent: UNS S17400, WNR.1.4542, Hom 630
5.Standard: ASTM A 693, ASME SA 693, AMS 5604

Xa kev nug

Khoom Taw qhia

Lub npe17-4 PAByog ntsiag to dag. Lub "17" nyeem zoo li 400-series ferritic stainless, "4" suab zoo li nickel add-on, thiab tag nrho lub npe zoo li chemistry footnote. Qhov tseeb 17-4PH yog ib qho ntawm cov hlau tsis muaj zog tshaj plaws uas tus neeg tsim khoom tuaj yeem yuav - qib martensitic nag lossis daus-hardening qib uas nce mus txog 1,310 MPa tensile hauv nws qhov hnyav tshaj plaws, txog 70% muaj zog tshaj tus qauv 304 ntawm tib seem.

Lub npe zais qhov nthuav dav: qib no tsis tau txais nws lub zog los ntawm alloying ib leeg, tab sis los ntawm kev kho cua sov theem uas tus neeg yuav khoom - tsis yog lub zeb - yuav tsum qhia meej. Kev txiav txim 17-4PH phaj yam tsis tau sau npe tus mob thiab koj tau txais ib lub phaj muag muag nrog ib nrab lub zog nws muaj peev xwm. Kab lus no piav qhia txog ob tus cwj pwm, tsib lub hnub nyoog hauv nruab nrab, thiab cov teb uas yuav tsum tshwm sim ntawm kev yuav khoom.

Cov Khoom Muag Khoom

Bar & Rod

Phaj & Ntawv

Coil & Sawb

Tube & Tube

Haum: Flange, Tee, Luj Tshib, Reducer thiab lwm yam.

Forging: Nplhaib, Ncej, Vajvoog, Thaiv thiab lwm yam.

Cwj Pwm ib tug: tus mob mos (Zoo A)

Raws li xa thiab tom qab kev daws teeb meem ntawm 1,038℃nrog cua txias, 17-4PH yog martensitic tab sis mos - roughly 895 MPa tensile ntawm chav tsev kub, nrog zoo elongation. Hauv qhov xwm txheej no, lub phaj tuaj yeem tsim, machined, thiab welded yooj yim dua nyob rau theem tom ntej. Nws yog qhov xwm txheej uas cov neeg tsim khoom ua haujlwm: txiav cov blanks, tshuab lub ntsej muag, vuam lub rooj sib txoos. Lub zog yog ntxiv tom qab ntawd, hauv kev kho cua sov zaum kawg. Qhov no ob-theem logic yog tag nrho cov ntsiab lus ntawm nag lossis daus-hardening stainless: zoo li nws thaum nws yog mos, harden nws thaum nws ua tiav.

Cwm pwm ob: cov kev mob hnyav (H900 txog H1150)

Lub hnub nyoog luv ntawm 482℃rau 621℃hloov lub phaj. tooj liab, uas yog yaj nyob rau hauv lub martensitic matrix tom qab annealing, precipitates li nanoscale tooj liab-nplua nuj hais uas pin tus qauv thiab nqa lub zog tawm los mus rau 1,170 MPa ntawm H900. Tsa qhov kub thiab txias thiab precipitates coarsen, trading lub zog rau toughness thiab corrosion kuj. Tus neeg yuav khoom xaiv qhov kev lag luam tawm - tib lub phaj chemistry, tib lub zeb, tsib yam khoom tiav tiav. Tias yog vim li cas tus mob code yog kab tseem ceeb tshaj plaws ntawm 17-4PH xaj.

Chemistry tom qab ua kom yuam kev

Element	Ntau yam (wt%)	Txoj hauj lwm nws ua
Cov pa roj carbon	0.07 max	Khaws qis; Lub zog yog los ntawm nag lossis daus, tsis yog los ntawm carbides
Chromium	15.0 - 17.5	Passive zaj duab xis thiab corrosion kuj nyob rau theem ntawm 304 nyob rau hauv feem ntau cov kev pab cuam
Nickel	3.0 - 5.0	Stabilizes tus qauv martensitic thiab toughness
Tooj	3.0 - 5.0	Lub caij los nag - tsim cov Cu-nplua nuj uas ua rau lub phaj tawv
Niobium + Tantalum	0.15 - 0.45	Refines nplej thiab pab tswj cov nag lossis daus teb
Manganese / Silicon	1.00 / 1.00 max	Deoxidation thiab melting kev qhuab qhia

Ob tus lej ua qhov hnyav nqa: tooj liab ua rau qib hardenable, chromium ua rau nws stainless. Tshem cov tooj liab thiab lub phaj nyob ntawm qib martensitic-lub zog uas tsis muaj txoj hauv kev nce mus txog 1,300 MPa. Tshem tawm cov chromium thiab cov corrosion kuj poob mus rau cov hlau tsis tshua muaj hlau.

Xaiv qhov mob: lub zog los yog toughness

Qhov xwm txheej	Kev laus temp	Tensile (MPa)	Tawm tswv yim 0.2% (MPa)	Elongation (%)	Hardness (HRC)
H900	482℃/ 1 teev	1310 min	1170 min	10 min	40 - 47
H925	496℃/ 4 teev	1170 min	1070 min	10 min	38 - 46
H1025	552℃/ 4h	1070 min	1000 min	12 min	35 - 44
H1075	579℃/ 4h	1000 min	860 min	13 min	33 - 43
H1100	593℃/ 4h	965 min	795 min	14 min	32 - 40
H1150	621℃/ 4 teev	930 min	724 min	16 min	28 - 38

Txoj cai ntawm tus ntiv tes xoo: H900 yuav siab tshaj plaws lub zog thiab hardness rau cov khoom uas nqa load hauv compression los yog hnav - twj tso kua mis shafts, valve stems, fasteners. H1025 txog H1075 yog qhov nruab nrab engineering, qhov twg lub zog nyob twj ywm siab thiab toughness tau txais. H1150 raug xaiv thaum qhov pom qhov cuam tshuam, raug tshuaj chloride, lossis xav tau kev weldability zoo tom qab hardening. Tib phaj, tsib txawv engineering teb.

Cov qauv thiab cov qauv khoom

Daim ntawv	Txuj	Sau ntawv
Phaj / ntawv / strip	ASTM A693 (Hom 630)	Lub phaj txheem; suav nrog Condition A thiab H
Bar / pas / hlau	ASTM A564 (Qib 630)	Cov feem ntau daim ntawv rau machined Cheebtsam
Forgings	ASTM A705 Cov Lus Qhia Tshwj Xeeb	Valve lub cev, flanges, twj tso kua mis Cheebtsam
Aerospace daim ntawv	TIAB SA 5604	Aerospace-qib phaj thiab ntawv

Hu rau tam sim no

Qhov twg 17-4PH phaj khwv tau nws cov nqi

Valve stems thiab trims - siab hardness, zoo galling kuj, machined los ntawm hardened bar los yog phaj
Pump shafts thiab impellers - qaug zog lub zog ntawm H900-H1075 ntau yam
Aerospace thiab tiv thaiv Cheebtsam - AMS 5604 daim ntawv hauv H1025 / H1075
Fasteners thiab pins - classic 17-4PH lub luag haujlwm, hloov cov hlau alloy qhov twg corrosion kuj tseem ceeb
Pwm thiab tooling daim hlau - hnav tsis kam ntawm tus nqi qis

Peb qhov kev xav tsis zoo uas raug nqi nyiaj

"17-4PH yog stainless, yog li nws yog corrosion-proof." Nws tiv taus corrosion zoo li 304 hauv huab cua thiab kev pabcuam me me, tab sis hauv cov chlorides muaj zog nws pits thiab tuaj yeem raug SCC. Rau qhov hnyav chloride lub luag haujlwm, qhia meej H1150 tus mob thiab xav txog qib siab dua-alloy hloov.
"Vuam yog zoo yam tsis muaj kev kho cua sov." Vuam nyob rau hauv qhov xwm txheej A yog qhov tsim nyog, tab sis thaj tsam weld poob cov nag lossis daus nyuaj - lub rooj sib txoos yuav tsum tau rov kho dua tshiab thiab muaj hnub nyoog kom rov qab muaj zog, lossis tus qauv tsim yuav tsum zam lub hauv zos mos weld.
"H900 yog qhov zoo tshaj plaws vim tias nws yog qhov muaj zog tshaj plaws." Tshaj li ntawm 300℃kev pabcuam kub qhov H900 mob dhau-hnub nyoog thiab softens, thiab nws cov tawv nqaij yog qhov qis tshaj ntawm tsev neeg. Kub-kub los yog cuam tshuam kev pabcuam hu rau kev laus dua.

Dab tsi los muab tso rau ntawm daim ntawv xaj khoom

Txheem thiab qib: ASTM A693 Hom 630 / UNS S17400
Qhov xwm txheej: Qhov xwm txheej A (rau kev tsim khoom) lossis qhov tseeb H code (rau cov khoom tiav) - tsis txhob tso qhov khoob no
Dimensions: thickness, dav, ntev, thiab txiav kam rau ua yog hais tias blanks nkag
Daim ntawv pov thawj: EN 10204 3.1 nrog chemistry, cua sov tooj, thiab cov ntaub ntawv kho cua sov
Kev tshuaj xyuas: hardness xyuas ntawm lub phaj xa tawm tiv thaiv qhov kev txiav txim

Lub phaj uas tuaj txog tsuas yog ib nrab ntawm cov lus qhia. Lwm ib nrab yog qhov kev txiav txim siab kho cua sov uas tus neeg yuav khoom tswj. Lub npe ntawm tus mob, thiab 17-4PH xa cov phaj tsis muaj zog tshaj plaws hauv phau ntawv teev npe; cia nws tsis hais, thiab tib lub phaj tuaj txog ntawm ib feem ntawm lub zog ntawd.