ASTM A500 Qib A yog dab tsi?
ASTM A500 yog tus qauv specification rautxias- tsim welded thiab seamless carbon steel hollow structural seem (HSS), npog square, duab plaub, puag ncig thiab tshwj xeeb -zoo li tus tubing. A500 Qib A square tubing feem ntau yog ua los ntawm cov qauv hlau thiab tsim los ntawm kev khoov txias lossis kub dov txheej txheem. Txias-bent square tubing muaj qhov du thiab qhov siab qhov tseeb, ua rau nws tsim nyog rau cov ntawv thov uas xav tau cov qauv zoo nkauj, thaum kub -rolled square tubing muaj zog dua thiab toughness thiab feem ntau yog siv rau hauv load-cov kabmob. Cov lus qhia tshwj xeeb txwv qhov loj me: cov raj yuav tsum yog 88 nti (2235 mm) lossis tsawg dua nyob rau hauv ib ncig thiab 0.875 nti (22 mm) lossis tsawg dua hauv phab ntsa tuab.
Lub cev muaj zog
Lub cev lub cev ntawm A500 Qib A carbon steel HSS tau sau tseg hauv cov lus hauv qab no.
| Lub cev khoom | Tus nqi |
|---|---|
| Qhov ntom | 7.85 g/cc (0.284 lb/in³) |
| Melting Point | 2,750℃F (1,510 degree) |
| Rockwell Hardness | 75 - 90 |
| Brinell Hardness | 137 - 185 |
| Shear Modulus | 80.0 GPa (11,600 ksi) |
Mechanical Properties
Qib A yog qib qis tshaj plaws hauv tsev neeg A500. Qhov tsawg kawg nkaus tensile lub zog yog 45,000 psi (310 MPa) rau ob qho tib si puag ncig thiab zoo li tus seem. Qhov tsawg kawg nkaus tawm lub zog yog 33,000 psi (228 MPa) rau puag ncig structural tubing thiab 39,000 psi (269 MPa) rau zoo li tus qauv tubing, nrog rau qhov tsawg kawg nkaus elongation ntawm 25% ntsuas ntawm 2-nti gauge ntev.
| Khoom | Round Structural Tubing | Zoo li tus qauv tubing |
|---|---|---|
| Tensile zog, min | 45,000 psi (310 MPa) | 45,000 psi (310 MPa) |
| Yield zog, min | 33,000 psi (228 MPa) | 39,000 psi (269 MPa) |
| Elongation, min | 25% | 25% |
Tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg ntawm A500 Qib A yog tswj los ntawm kev ntsuas cua sov nrog cov nyiaj pub dawb rau kev tshuaj xyuas cov khoom, raws li qhia hauv qab no. Manganese raug txwv rau 1.35% siab tshaj plaws, thiab qhov twg tooj liab -cov kabmob hlau tau teev tseg qhov tsawg kawg nkaus tooj liab cov ntsiab lus siv.
| Element | Kev ntsuas kub (max) | Product Analysis (Max) |
|---|---|---|
| Cov pa roj carbon (C) | 0.26% | 0.30% |
| Manganese (Mn) | 1.35% | - |
| Phosphorus (P) | 0.035% | 0.045% |
| Sulfur (S) | 0.035% | 0.045% |
| Copper (Cu), min thaum teev | 0.20% | 0.18% |
Manufacturing, Inspection thiab Marking
Kev tsim cov txheej txheem rau ob qho tib si A500 Qib A welded thiab seamless kav yog standardized, nrog rau cov kev cai rau vuam txoj kev, vuam zoo tswj thiab seamless yeeb nkab txoj kev, thiaj li yuav ua tau zoo thiab kev ua tau zoo ntawm cov tiav seem. Cov kev qhia tshwj xeeb kuj tseem hais txog kev tshuaj xyuas thiab kev sim, xws li kev tshuaj xyuas qhov muag, ntsuas qhov ntev, ntsuas cov cuab yeej cuab tam thiab tshuaj lom neeg muaj pes tsawg leeg, suav nrog cov qauv ntsuas thiab ntsuas zaus kom ntseeg tau tias txhua pawg ntawm cov yeeb nkab ua tau raws li tus qauv yuav tsum tau ua. Tsis tas li ntawd, cov kav dej yuav tsum tau cim kom meej nrog cov ntaub ntawv xws li hnub tsim khoom, qib steel, specification thiab batch naj npawb los pab txhawb kev taug qab thiab kev tswj xyuas, thiab cov ntim yuav tsum tiv thaiv cov yeeb nkab los ntawm kev puas tsuaj thiab corrosion thaum thauj thiab khaws cia.
Cov lus nug nquag
HSS seem yog dab tsi?
HSS stands rau hollow structural seem, kaw - profile steel tube ua nyob rau hauv square, rectangular thiab round shapes rau siv raws li cov tswv cuab.
Qhov txawv ntawm A500 Qib A thiab Qib B yog dab tsi?
Qib B muaj lub zog siab dua li Qib A, nrog qhov tsawg kawg nkaus tawm lub zog ntawm 42,000 psi (290 MPa) rau cov seem puag ncig thiab 46,000 psi (315 MPa) rau cov seem, thiab yog qib feem ntau teev.
A500 Qib A square raj puas tuaj yeem welded?
Yog lawm. A500 yog cov pa roj carbon steel nrog zoo weldability siv cov txheej txheem txheej txheem, uas yog vim li cas nws yog dav siv hauv welded steel thav ntawv thiab cov qauv.
A500 square tube ua li cas?
Sawb steel yog txias tsim rau hauv ib lub xwmfab los yog duab plaub thiab cov seam yog welded, los yog seem yog tsim los ua seamless raj, ua raws li sizing thiab straightening.
Qhov kev txwv loj npaum li cas rau A500 tubing?
Qhov ncig yuav tsum tsis pub tshaj 88 nti (2235 mm) thiab phab ntsa thickness yuav tsum tsis pub tshaj 0.875 nti (22 mm).