ASTM A302 yog ib qho tshwj xeeb rau manganese-molybdenum thiab manganese-molybdenum-nickel alloy steel daim hlau npaj rau siv hauv welded boilers thiab cov hlab ntsha siab. Qib A thiab Qib C poob raws li qhov tshwj xeeb no, nrog qhov sib txawv tseem ceeb yog tias Qib A yog cov manganese ncaj nraim -molybdenum steel, thaum Qib C suav nrog nickel ntxiv los txhim kho nws cov khoom.
ASTM A302 Qib Ayog manganese-molybdenum alloy steel phaj. Nws muaj lub zog tensile ntau ntawm 75-95 ksi (515-655 MPa), ua rau nws qib qis zog hauv tsev neeg A302. Qib no tso siab rau manganese thiab molybdenum ua cov ntsiab lus tseem ceeb ntawm kev ua tiav nws cov khoom siv kho tshuab. Cov hlau yog tsim los ntawm kev siv cov hlau tua thiab yuav tsum ua raws li cov kev cai loj loj. Nws yog qhov tsim nyog rau kev tsim cov hlab ntsha dav dav uas cov qib siab muaj zog txaus.
ASTM A302 Qib Cyog manganese -molybdenum-nickel alloy steel phaj. Nws muaj lub zog tensile ntau dua ntawm 80-100 ksi (550-690 MPa), muab tso rau hauv qib siab zog ntawm cov lus qhia nrog rau Qib B thiab D. Qhov sib ntxiv ntawm npib tsib xee rau manganese-molybdenum puag muab kev txhim kho hardenability thiab toughness piv rau Qib A. Zoo li txhua qib raws li qhov tshwj xeeb no, nws yog tsim los ua cov hlau tua nrog cov qauv zoo.
Tshuaj muaj pes tsawg leeg
ASTMA302 Qib CTshuaj muaj pes tsawg leeg | |||||||
Qib | Cov ntsiab lus Max (%) | ||||||
C | Si | Mn | P | S | Al | N | |
A302 Qib C | 0.20-0.25 | 0.13–0.45 dr hab | 1.07-1.62 | 0,035 | 0,035 |
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Nb | V | Ti | Cu | Cr | Ni | Mo | |
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| 0.37-0.73 | 0.41–0.64 Nws | |
ASTMA302 Qib ATshuaj muaj pes tsawg leeg | |||||||
Qib | Cov ntsiab lus Max (%) | ||||||
C | Si | Mn | P | S | Al | N | |
A302 Qib C | 0.20-0.25 | 0.15–0.45 dr hab | 0.95-1.41 | 0,035 | 0,035 |
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Nb | V | Ti | Cu | Cr | Ni | Mo | |
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| 0.37-0.73 | 0.45–0.64 Nws | |
Mechanical Property
Qib |
| ASTM A302 Qib CMechanical Property | ||
Thickness | Yield | Tensile | Elongation | |
A302 Qib C | mm | Min Mpa | Mpa | Tsawg% |
6-50 | 345 | 550-690 | 20% | |
50-200 | 345 | 550-690 | 17% | |
Mechanical Property ntawm A302 Qib A steel phaj | A302 Qib A |
Tensile zog, kis [MPa] | 75-95 [515-655] |
Yield zog, min, kis [MPa] | 45 [310] |
Elongation hauv 8 nti [200 mm], min, % | 15 |
Elongation hauv 2 nti [50 mm], min, % | 19 |
