carbon steel plate q245r for boiler pressure vessel-k8凯发官网
carbon steel plate q245r for boiler pressure vessel
1 main use
q245r steel plate has low sulfur and phosphorus content, and has good welding performance and impact toughness. it is suitable for the production of medium temperature, medium and low pressure pressure vessels and their accessories.
2 grades and standards
product grade: q245r
executive standard: gb713-2008
3 technical conditions of supply
3.1 product specifications
6～80×1500～4000×l;
3.2 chemical composition
table 1 chemical composition, %
牌号 | c | si | mn | p | s | altb |
q245r | ≤0.20 | ≤0.35 | 0.50～1.00a | ≤0.025 | ≤0.015 | ≥0.020 |
a for steel plates with a thickness greater than 60 mm, the upper limit of mn content may be up to 1.20%.
3.3 mechanical properties
table 2 mechanical properties
牌号 | 规格,mm | rm,mpa | rel,mpa | a,% | akv,，横向，j | 冷弯，b=2a, 180° |
不小于 | ||||||
q245r | 6～16 | 400～520 | 245 | 25 | 31(0℃) 31(-20℃) | d=1.5a |
＞16～36 | 235 | |||||
＞36～60 | 225 | |||||
＞60～80 | 390～510 | 205 | 24 | d=2a | ||