medium and low-k8凯发官网
medium and low-strength carbon steel sheets for pressure vessels (s) a285a/b/c
1 main use
(s) a285a/b/c is used to manufacture structural parts in boilers and pressure vessels.
2 grades and standards
product grade: (s) a285a/b/c
executive standard: astm a285/a285m-04 asme sa285/sa285m-04
3 technical conditions of supply
3.1 product specifications
6～80×1500～4000×lmm;
3.2 chemical composition
table 1 chemical composition, %
牌号 | c | mn | p | s |
(s)a285a | ≤0.17 | ≤0.90 | ≤0.035 | ≤0.035 |
(s)a285b | ≤0.22 | ≤0.90 | ≤0.035 | ≤0.035 |
(s)a285c | ≤0.28 | ≤0.90 | ≤0.035 | ≤0.035 |
3.3 mechanical properties table
2 mechanical properties
牌号 | rel,n/mm2 | rm,n/mm2 | a200,% |
(s)a285a | ≥165 | 310～450 | ≥27 |
(s)a285b | ≥185 | 345～485 | ≥25 |
(s)a285c | ≥205 | 380～515 | ≥23 |
normalizing state impact performance:
3.4 delivery status: hot rolling, normalizing
牌号 | 规格，mm | 冲击温度，℃ | 试样方向 | 验收值，j |
(s)a285a | 6～25 | 4 | 纵向 | ≥14 |
＞25～80 | 16 | |||
(s)a285b | 6～25 | 10 | ||
＞25～80 | 21 | |||
(s)a285c | 6～25 | 16 | ||
＞25～80 | 27 |