astm a500 qib a vs b
Qhov sib txawv ntawmASTM A500 Qib A thiab Qib Bnyob rau hauv cov nqe lus ntawmchemical muaj pes tsawg leeg, mechanical zog, thiab mechanical kev ua tau zoo:
Chemical Composition Limits (%)
| Element | ASTM A500 Qib A | ASTM A500 Qib B | Qhov txawv tseem ceeb |
|---|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.25 | Tsawg dua lossis sib npaug li 0.23 * | Qib B muaj ame ntsis qis carbon maxrau kev txhim kho weldability thiab ductility. |
| Manganese (Mn) | 0.27–0.63* | 1.15–1.50 | Qib B xav tauntau dua Mntxhawm rau txhim kho lub zog thiab kev ua haujlwm ruaj khov. |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.035 | Tib qhov txwv nruj rau ob qib. |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.035 | Tib qhov txwv nruj rau ob qib. |
| Sau ntawv | * Tsawg Mn tuaj yeem txwv lub zog muaj peev xwm | * Siab dua Mn boosts yield / tensile zog | Qib B's chemistry yog optimized raustructural load-cov ntaub ntawv bearing. |
Mechanical Properties Requirements
| Khoom | Qib A | Qib B | Qhov txawv tseem ceeb |
|---|---|---|---|
| Yield zog | Ntau dua lossis sib npaug rau 228 MPa (33 ksi) | Ntau dua lossis sib npaug rau 315 MPa (45 ksi) | Qib B muaj kwv yees li 38% siab zog tawm los, haum rau hnyav -load qauv. |
| Tensile zog | 310-428 MPa (45-62 ksi) | 380-480 MPa (55-70 ksi) | Qib B muab lub zog tensile ntau dua rau kev ua kom zoo dua qub. |
| Elongation | Ntau dua lossis sib npaug li 23% (2-nti ntsuas qhov ntev) | Ntau dua lossis sib npaug li 18% (2-nti ntsuas qhov ntev) | Qib A muaj ductility zoo dua, zoo tagnrho rau kev sib sau txias; Qib B sib npaug zog thiab ductility. |
Mechanical Performance thiab Application Characteristics
| Khoom vaj khoom tsev / yam ntxwv | Qib A | Qib B | Qhov txawv tseem ceeb |
|---|---|---|---|
| Tej kev siv | Lub teeb thav duab, laj kab, kev txhawb nqa zoo nkauj | Lub tsev kem, hnyav machinery thav duab, trailer qauv | Qib B yog haum rau siab - kev nyuaj siab, hnyav - load ib puag ncig. |
| Weldability | Zoo heev (tsawg Mn / C cov ntsiab lus) | Zoo (yuav tsum tau tswj cov kev ntsuas vuam) | Qib A yooj yim dua rau vuam, zoo tagnrho rau ntawm - qhov chaw tsim kho. |
| Impact Resistance | Haum rau qhov chaw me me | Haum rau txias / dynamic load ib puag ncig | Qib B, nrog cov ntsiab lus Mn siab dua, muaj qhov zoo dua qis -kub toughness. |
| Tus nqi -Kev ua tau zoo | Kev lag luam ntau dua (qis Mn tus nqi) | Tus nqi siab dua me ntsis (hwm rau lub zog siab) | Qib A yog tus nqi - zoo rau cov haujlwm tsis yog - tseem ceeb; Qib B muaj txiaj ntsig zoo rau cov qauv tseem ceeb. |
Daim ntawv thov Scenario sib piv
| Qib | Tsim nyog Application Scenarios | Qhov Zoo Tshaj Plaws |
|---|---|---|
| Qib A | Tsev cog khoom thav duab, vaj laj kab, lub teeb shelving, cov qauv zoo nkauj | Lub teeb yuag, yooj yim rau kev ua haujlwm, tus nqi qis, zoo tagnrho rau cov uas tsis yog -load- cov xwm txheej. |
| Qib B | Cov kab hauv tsev, cov cuab yeej siv khoom lag luam, trailer chassis, cov tshuab hnyav | Lub zog siab, siab rigidity, hnyav -load tsis kam, zoo tagnrho rau cov qauv tseem ceeb. |
A500 GRA thiab GRB Tube Hoobkas
