ASTM A285 Qib B thiab C yog cov pa roj carbon hlau rau cov hlab ntsha siab, nrog Qib C muaj zog dua qib B, muab lub zog tensile ntau dua (380-515 MPa) thiab tawm lub zog (205 MPa min) tab sis qis dua elongation, thaum Qib B muaj lub zog nruab nrab (345-485 MPa 5 MPa, 180 MPa tensile, 185 MPa tensile, 1. muaj siab tshaj cov ntsiab lus carbon (0.28% vs 0.22%). Qhov sib txawv tseem ceeb nyob hauv lawv cov khoom siv kho tshuab, nrog lub zog nce los ntawm A txog B txog C, ua rau C haum rau kev thov ntau dua.
Tshuaj muaj pes tsawg leeg ntawm A285 Qib B
|
Element |
Kev sib xyaw (%) |
|---|---|
|
Cov pa roj carbon (C) |
0.22 max |
|
Manganese (Mn) |
0.90 max |
|
Phosphorus (P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
Tshuaj muaj pes tsawg leeg ntawm A285 Qib C
|
Element |
Kev sib xyaw (%) |
|---|---|
|
Cov pa roj carbon (C) |
0.28 max |
|
Manganese (Mn) |
0.98 max |
|
Phosphorus (P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
Mechanical Properties ntawm A285 Qib B
|
Khoom |
Tus nqi |
|---|---|
|
Tensile zog |
50-70 ksi (345-485 MPa) |
|
Yield zog |
27 ksi (185 MPa) min |
|
Elongation (hauv 200mm) |
25% min |
|
Elongation (hauv 50mm) |
28% min |
Mechanical Properties ntawm A285 Qib C
| Qib | ASTM A285 qib C steel Mechanical Property | ||||
| Tensile zog (MPa) | Yield zog (MPa) | % Elongation hauv 2 nti (50mm) min | Impacting Test Temperature (degree) | ||
| A285 qib C | 380-515 | 205 | 25 | -20, -40, -60 | |
Qhov Tseem Ceeb Qhov txawv (A285 Qib B vs Qib C)
Lub zog: Qib C muaj zog dua qib B, nrog qhov siab tshaj qhov ua tau zoo thiab lub zog tensile ntau.
Tensile zog:
Qib B: 345-485 MPa (50-70 ksi).
Qib C: 380-515 MPa (55-75 ksi).
Yield zog (min):
Qib B: 185 MPa (27 ksi).
Qib C: 205 MPa (30 ksi).
Elongation (hauv 8 hauv / 200mm, min):
Qib B: 25%.
Qib C: 23%.
Cov ntsiab lus carbon (max):
Qib B: 0.22%.
Qib C: 0.28%.
Kev Siv & Kev Siv
Ob qib yog siv hauv kev tsim cov hlab ntsha siab. Qib C, nrog nws lub zog siab dua, feem ntau yog siv rau kev xav tau ntau dua, kev siv siab dua / kub, thaum Qib B muab qhov sib npaug zoo rau kev siv dav dav, thiab Qib A rau qis dua - kev xav tau kev ntxhov siab.
