low weld crack sensitive high strength steel plate (60-k8凯发官网
low weld crack sensitive high strength steel plate (60-90kg grade)
1 the main purpose
this product is a low-weld crack-sensitive steel with yield strengths of 460, 500, 550, 620, 690, and 800 mpa. it has excellent welding performance without pre-weld preheating and no heat treatment after welding. it can be used in various coal mining machinery and engineering machinery. , port machinery, construction machinery and other structural components that require good weldability.
2 grades and standards
q460cfc/d/e q500cfc/d/e q550cfc/d/e q620cfc/d/e | standard: yb/t4137-2005 "low welding crack sensitivity high strength steel sheet"
|
q690cfc/d/e | |
q800cfc/d/e | |
jg670cf jg785cf | agreement: jgx698-2011 "jg670cf, jg785cf low welding crack sensitivity high strength steel plate technology agreement" |
3 technical conditions of supply
3.1 product specifications
8～80×2200～3800×6000～12000mm
3.2 chemical composition
chemical composition
牌号 | c | si | mn | p | s | 其它微合金 | cev | pcm | |
q460cfc/d/e | ≤0.12 | ≤0.50 | ≤1.80 | ≤0.020 | ≤0.010 | 适量
| / | ≤0.20 | |
q500cfc/d/e | |||||||||
q550cfc/d/e | ≤0.25 | ||||||||
q620cfc/d/e | |||||||||
q690cfc/d/e | |||||||||
q800 cfc/d/e | ≤0.28 | ||||||||
jg670cf | ≤30 | ≤0.12 | ≤0.55 | ≤1.80 | ≤0.020 | ≤0.015 | ≤0.43 | ≤0.22 | |
＞30 | ≤0.45 | ≤0.25 | |||||||
jg785cf | ≤30 | ≤0.45 | ≤0.23 | ||||||
＞30 | ≤0.48 | ≤0.25 | |||||||
3.3 力学性能
力学性能
牌号
| 规格 mm | 屈服强度 mpa | 抗拉强 mpa | 延伸率 a，% | 180°弯曲试验 b=2a | 夏比冲击试验，纵向 | |
试验温度/ ℃ | kv2 ，j | ||||||
q460cfc/d/e | ≤50 | ≥460 | 550～710 | ≥17 | d=3a | （c ）0 （d ）-20 （e ）-40 | ≥47
|
＞50～80 | ≥440 | ||||||
q500cfc/d/e | ≤50 | ≥500 | 610～770 | ≥17 | |||
＞50～80 | ≥480 | ||||||
q550cfc/d/e | ≤50 | ≥550 | 670～830 | ≥16 | |||
＞50～80 | ≥530 | ||||||
q620cfc/d/e | ≤50 | ≥620 | 710～880 | ≥15 | |||
＞50～80 | ≥600 | ||||||
q690cfc/d/e | ≤50 | ≥690 | 770～930 | ≥14 | |||
＞50～80 | ≥670 | ||||||
q800cfc/d/e | ≤50 | ≥800 | 880～1050 | ≥12 | |||
jg670cf | ≤16 | ≥550 | 670～830 | ≥14 | 0 | ≥47 | |
＞16～80 | ≥530 | ||||||
jg785cf | ≤50 | ≥690 | 770～930 | a50≥14 | |||
＞50～80 | ≥670 | ||||||