304 stainless hlau yog ib qho khoom siv ntawm cov hlau tsis muaj steel, nrog qhov ceev ntawm 7.93 g / cm³; nws tseem hu ua 18/8 stainless hlau hauv kev lag luam, uas txhais tau hais tias nws muaj ntau tshaj 18% chromium thiab ntau tshaj 8% npib tsib xee; Nws yog resistant rau kub ntawm 800 ℃, muaj kev ua tau zoo thiab siab toughness, thiab yog dav siv nyob rau hauv industrial thiab rooj tog kho kom zoo nkauj industries thiab cov zaub mov thiab kev kho mob industries. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias cov ntsiab lus Performance index ntawm cov zaub mov qib 304 stainless hlau yog nruj dua li ntawm 304 stainless hlau zoo tib yam. Piv txwv li: lub ntsiab lus thoob ntiaj teb ntawm 304 stainless hlau yog tias nws feem ntau muaj 18% -20% chromium thiab 8% -10% npib tsib xee, tab sis cov zaub mov-qib 304 stainless hlau muaj 18% chromium thiab 8% npib tsib xee, tso cai hloov pauv hauv qee yam. ntau yam thiab txwv cov ntsiab lus ntawm ntau yam hnyav hlau. Hauv lwm lo lus, 304 stainless hlau tsis tas yuav khoom noj-qib 304 stainless hlau.
Cov txheej txheem kev cim ntau hauv kev ua lag luam suav nrog 06Cr19Ni10 thiab SUS304, ntawm 06Cr19Ni10 feem ntau qhia txog lub teb chaws tus qauv tsim, 304 feem ntau qhia ASTM tus qauv tsim, thiab SUS304 qhia cov qauv tsim khoom hauv Nyij Pooj.
304 yog lub hom phiaj dav dav hlau stainless, uas yog siv dav hauv kev tsim cov khoom siv thiab cov khoom uas xav tau kev ua haujlwm zoo (corrosion resistance and formability). Yuav kom tswj tau qhov kev tiv thaiv corrosion ntawm cov hlau tsis muaj steel, cov hlau yuav tsum muaj ntau tshaj 18% chromium thiab ntau tshaj 8% npib tsib xee. 304 stainless hlau yog qib stainless hlau ua raws li American ASTM tus qauv.
Lub cev muaj zog:
Tensile zog σb (MPa) ≥ 515-1035
Cov txiaj ntsig kev tawm dag zog σ0.2 (MPa) ≥ 205
Elongation δ5 (%) ≥ 40
Sectional shrinkage ψ (%) ≥?
Hardness: ≤201HBW; ≤92HRB; ≤ 210HV
Qhov ceev (20 ℃, g / cm³): 7.93
Melting point (℃): 1398 ~ 1454
Lub peev xwm tshwj xeeb kub (0 ~ 100 ℃, KJ·kg-1K-1): 0.50
Thermal conductivity (W·m-1·K-1): (100 ℃) 16.3, (500 ℃) 21.5
Kev nthuav dav coefficient (10-6·K-1): (0 ~ 100 ℃) 17.2, (0 ~ 500 ℃) 18.4
Resistant (20 ℃, 10-6Ω·m2 / m): 0.73
Longitudinal elastic modulus (20 ℃, KN / mm2): 193
Cov khoom muaj pes tsawg leeg
Qhia
Editor
Rau 304 stainless hlau, Ni lub hauv paus hauv nws cov muaj pes tsawg leeg yog qhov tseem ceeb heev, uas ncaj qha txiav txim siab corrosion thiab tus nqi ntawm 304 stainless hlau.
Cov ntsiab lus tseem ceeb tshaj plaws hauv 304 yog Ni thiab Cr, tab sis lawv tsis txwv rau ob lub ntsiab lus no. Cov kev cai tshwj xeeb tau teev tseg los ntawm cov qauv khoom. Qhov kev txiav txim siab hauv kev lag luam yog tias ntev npaum li cov ntsiab lus Ni ntau dua 8% thiab cov ntsiab lus Cr ntau dua 18%, nws tuaj yeem suav tias yog 304 stainless hlau. Qhov no yog vim li cas kev lag luam hu ua hom stainless hlau 18/8 stainless hlau. Qhov tseeb, cov qauv khoom lag luam muaj cov kev cai meej meej rau 304, thiab cov qauv khoom lag luam no muaj qee qhov sib txawv rau cov hlau tsis muaj cov duab sib txawv. Cov hauv qab no yog qee cov qauv khoom siv thiab kev sim.
Txhawm rau txiav txim siab seb cov khoom puas yog 304 stainless hlau, nws yuav tsum ua kom tau raws li qhov yuav tsum tau muaj ntawm txhua lub hauv paus hauv cov qauv khoom. Tsuav yog ib qho tsis tau raws li qhov yuav tsum tau ua, nws tsis tuaj yeem hu ua 304 stainless hlau.
1. ASTM A276 (Standard Specification rau Stainless Hlau Bars thiab Shapes)
304
C
Mn
P
S
Si
Cr
Ni
Kev xav tau,%
≤ 0.08
≤ 2.00
≤ 0.045
≤ 0.030
≤ 1.00
18.0-20.0 Nws
8.0-11.0 Nws
2. ASTM A240 (Chromium thiab Chromium-Nickel Stainless Hlau Phaj, Sheet, thiab Sawb rau Cov Khoom Siv Hluav Taws Xob thiab Kev Siv Hluav Taws Xob)
304
C
Mn
P
S
Si
Cr
Ni
N
Kev xav tau,%
≤ 0.07
≤ 2.00
≤ 0.045
≤ 0.030
≤ 0.75
17.5–19.5 Nws
8.0-10.5 Nws
≤ 0.10
3. JIS G4305 (txias-rolled stainless hlau phaj, ntawv thiab sawb)
TIAB SA 304
C
Mn
P
S
Si
Cr
Ni
Kev xav tau,%
≤ 0.08
≤ 2.00
≤ 0.045
≤ 0.030
≤ 1.00
18.0-20.0 Nws
8.0-10.5 Nws
4. JIS G4303 (Stainless hlau tuav)
TIAB SA 304
C
Mn
P
S
Si
Cr
Ni
Kev xav tau,%
≤ 0.08
≤ 2.00
≤ 0.045
≤ 0.030
≤ 1.00
18.0-20.0 Nws
8.0-10.5 Nws
Plaub tus qauv saum toj no tsuas yog qee qhov sib xws xwb. Qhov tseeb, muaj ntau tshaj li cov qauv no uas hais txog 304 hauv ASTM thiab JIS. Qhov tseeb, txhua tus qauv muaj cov kev xav tau sib txawv rau 304, yog li yog tias koj xav txiav txim siab seb cov khoom puas yog 304, txoj hauv kev zoo los qhia nws yuav tsum yog tias nws ua tau raws li 304 qhov yuav tsum tau ua hauv qee cov qauv khoom.
Khoom qauv:
1. Txoj kev sau npe
Lub koom haum American Iron thiab Steel siv peb tus lej los sau npe rau ntau qib txheej txheem ntawm forgeable stainless hlau. Ntawm lawv:
① Austenitic stainless hlau yog sau nrog 200 thiab 300 series tooj. Piv txwv li, qee cov austenitic stainless hlau tau sau nrog 201, 304, 316 thiab 310.
② Ferritic thiab martensitic stainless hlau yog sawv cev los ntawm 400 series tooj.
③ Ferritic stainless hlau yog sau nrog 430 thiab 446, thiab martensitic stainless hlau yog sau nrog 410, 420 thiab 440C.
④ Duplex (austenitic-ferrite), stainless hlau, nag lossis daus hardening stainless hlau thiab siab alloys nrog cov ntsiab lus hlau tsawg dua 50% feem ntau yog npe los ntawm cov npe patent lossis cov cim lag luam.
2. Kev faib thiab muab qhab nia
1. Qib thiab kev faib tawm: ① National standard GB ② Kev lag luam tus qauv YB ③ Local standard ④ Enterprise standard Q/CB
2. Kev faib tawm: ① Cov qauv khoom ② Ntim cov qauv ③ Cov txheej txheem ④ Cov qauv yooj yim
3. Standard Level (sib faib ua peb theem): Y theem: International advanced theem I theem: International general theem H theem: domestic advanced theem
4. Lub teb chaws tus qauv
GB1220-2007 Stainless hlau tuav (I theem) GB4241-84 Stainless hlau vuam coil (H theem)
GB4356-2002 Stainless hlau vuam coil (I theem) GB1270-80 Stainless hlau yeeb nkab (I theem)
GB12771-2000 Stainless hlau welded yeeb nkab (Y theem) GB3280-2007 Stainless hlau txias phaj (Kuv theem)
GB4237-2007 Stainless hlau kub phaj (I theem) GB4239-91 Stainless hlau txias siv (Kuv theem)
Post lub sij hawm: Sep-11-2024