Astm A242
Cov Khoom Piav Qhia ASTM A242 yog tus qauv lees paub dav dav uas txhais cov lus qhia tshwj xeeb rau ib hom hlau. Nkag siab txog cov tshuaj muaj pes tsawg leeg thiab cov khoom ntawm cov hlau ua raws li tus qauv no yog qhov tseem ceeb rau ntau yam kev siv hauv kev lag luam xws li kev tsim kho, ...
Hauj lwm lawm
Khoom Description
ASTM A242 Corten HOM 1 Hom 2 Cov Khoom Siv Tshuaj:
| Qib Steel | C max | Mn | P max | S max | Si | Nim max | Cr | Cu | V | Mo | Nb |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A242 Hom I | 0.19 | 0.80-1.25 | 0.04 | 0.05 | 0.30-0.65 | 0.40 | 0.40-0.65 | 0.25-0.55 | 0.02-0.10 | ||
| A242 Type II | 0.20 | 1.35 max | 0.04 | 0.05 | 0.30-0.65 | 0.40 | 0.40-0.65 | 0.20-0.55 | 0.02-0.10 |
ASTM A242 Hom I Mechanical Properties:
| Qib | Min. Yield zog Mpa | Tensile zog MPa | Kev cuam tshuam | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| A242 Type1 | Nominal Thickness (hli) | Nominal Thickness (hli) | degree | J | |||||||
| Tsawg dua los yog sib npaug li 16 | >16 Tsawg dua los yog sib npaug li 40 |
>40 Tsawg dua lossis sib npaug li 63 |
>63 Tsawg dua los yog sib npaug li 80 |
>80 Tsawg dua los yog sib npaug li 100 |
>100 Tsawg dua los yog sib npaug li 150 |
Tsawg dua los yog sib npaug 3 | >3 Tsawg dua los yog sib npaug rau 100 | >100 Tsawg dua los yog sib npaug rau 150 | -20 | 27 | |
| 355 | 345 | …. | …. | …. | …. | 510-680 | 470-630 | …. | |||
Phosphorus thiab sulfur feem ntau muaj nyob rau hauv qhov tsawg vim tias lawv tuaj yeem muaj kev cuam tshuam rau cov hlau cov khoom yog tias muaj ntau dhau. Phosphorus tuaj yeem ua kom brittleness, thaum sulfur tuaj yeem txo cov ductility thiab weldability.
Chromium yog ntxiv rau impart corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas raug rau ya raws thiab tshuaj. Nickel txhim khu lub toughness thiab corrosion kuj, thaum tooj liab kuj tuaj yeem pab txhim kho corrosion kuj.
Kev sib xyaw ua ke thiab kev faib ua feem ntawm cov ntsiab lus hauv ASTM A242 steel ua rau cov khoom siv zoo heev. Lub zog tensile, lub zog tawm los, thiab elongation yog qhov tseem ceeb uas txiav txim siab cov hlau muaj peev xwm tiv taus cov loads thiab deformations. Lub siab tensile thiab yield zog ua rau nws haum rau cov qauv siv uas lub zog yog qhov tseem ceeb tshaj plaws.
Nyob rau hauv cov nqe lus ntawm corrosion kuj, ASTM A242 steel qhia superior kev ua tau zoo piv rau lwm yam steels. Nws lub peev xwm los tsim cov txheej txheem oxide tiv thaiv thaum raug rau huab cua pab tiv thaiv xeb thiab deterioration nyob rau lub sijhawm. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov qauv sab nraum zoov thiab cov khoom uas raug rau huab cua hnyav.
Lub weldability ntawm ASTM A242 steel yog lwm qhov tseem ceeb. Cov txheej txheem vuam kom raug thiab cov txheej txheem yuav tsum tau ua kom ntseeg tau tias cov pob qij txha muaj zog thiab txhim khu kev qha. Cov hlau muaj pes tsawg leeg thiab microstructure tuaj yeem cuam tshuam rau weldability, thiab preheating thiab tom qab vuam kev kho cua sov yuav tsim nyog nyob rau qee kis kom tau txais qhov zoo tshaj plaws weld.
Cov khoom cua kub kuj tuaj yeem ua si thaum xav txog kev siv ASTM A242 steel. Cov coefficient ntawm thermal expansion thiab thermal conductivity yog yam uas yuav tsum tau suav rau hauv cov ntawv thov uas qhov kub hloov pauv tseem ceeb.
Tsis tas li ntawd, qhov qaug zog tsis kam ntawm cov hlau yog qhov tseem ceeb hauv kev thauj khoom dynamic. Kev nkag siab txog nws tus cwj pwm qaug zog pab tsim cov khoom siv uas tuaj yeem tiv taus kev rov ua haujlwm cyclic tsis ua haujlwm.
Hauv cov ntsiab lus, ASTM A242 tus qauv txhais cov hlau uas muaj cov tshuaj lom neeg muaj txiaj ntsig zoo uas ua rau muaj cov khoom siv tshwj xeeb thiab corrosion-resistant. Kev paub txog cov khoom no yog qhov tseem ceeb rau cov kws tshaj lij thiab cov neeg tsim qauv los txiav txim siab thaum xaiv cov khoom siv rau ntau yam kev siv, ua kom muaj kev nyab xeeb, ruaj khov, thiab kev ua haujlwm ntawm cov khoom tsim thiab cov khoom tsim. Kev tshawb fawb txuas ntxiv thiab kev txhim kho hauv cheeb tsam no txhawm rau txhim kho cov khoom zoo ntawm ASTM A242 steel kom tau raws li qhov xav tau ntawm kev lag luam niaj hnub no.
Cim npe nrov: astm a242, Tuam Tshoj astm a242 lwm tus neeg, hoobkas
