steel for hull structure-k8凯发官网
steel for hull structure
1 main use
a, b, d series products have good comprehensive mechanical properties, welding performance and process performance. it is suitable for the manufacture of structural structures such as ship hull structure, shipyard, oil production platform, marine medium transportation pipeline, coastal power plant and terminal facilities in ocean, coastal and inland river navigation areas.
ah32/ah36, dh32/dh36 high-strength hull structural steel series products have good comprehensive mechanical properties, welding performance and process performance. it is suitable for the manufacture of structural structures such as ship hull structure, shipyard, oil production platform, marine medium transportation pipeline, coastal power plant and terminal facilities in ocean, coastal and inland river navigation areas.
e, eh32, eh36 series products have good comprehensive mechanical properties, welding performance and process performance. it is suitable for the manufacture of structural structures such as ship hull structure, shipyard, oil production platform, marine medium transportation pipeline, coastal power plant and terminal facilities in ocean, coastal and inland river navigation areas.
tmcp high-strength hull structure steel series products are designed with low alloy composition, good welding performance, and good comprehensive mechanical properties and process performance. it is suitable for the manufacture of structural structures such as ship hull structure, shipyard, oil production platform, marine medium transportation pipeline, coastal power plant and terminal facilities in ocean, coastal and inland river navigation areas.
2 grades and standards
grades: a, b, d.
delivery status: hot rolling (ar), controlled rolling (cr), normalizing rolling (nr), normalizing (n).
implementation standards: ten countries ship regulations, fishing regulations, gb712-2000 "structural steel for hull".
grades ah32, ah36, dh32, dh36.
delivery status: controlled rolling (cr), normalized rolling (nr), normalizing (n).
implementation standards: ten countries ship regulations, gb712-2000 "structural steel for hull".
grades: e, eh32, eh36.
delivery status: normalized (n), tm (tmcp).
implementation standards: ten countries ship regulations, gb712-2000 "structural steel for hull".
grades: ah32, dh32, eh32, fh32; ah36, dh36, eh36, fh36; ah40, dh40, eh40, fh40, and additional z-direction (z25, z35) performance grades.
delivery status: tmcp.
implementation standards: ten countries ship regulations, gb712-2000 "structural steel for hull".
3 technical conditions of supply
3.1 product specifications
6～60×1400～4000×4000～12000mm
3.2 chemical composition
table 1 chemical composition, %
钢的等级 | c | si | mn | s | p | als |
a | ≤0.21 | ≤0.50 | ≥2.5c | ≤0.035 | ≤0.035 | - |
b | ≤0.35 | 0.80～1.20 | - | |||
d | 0.60～1.20 | ≥0.015 |
牌号 | 化学成分，% | ||||||||||
c | si | mn | s | p | als | nb | v | ti | cr | ni | |
ah32/36 dh32/36 | ≤0.18 | ≤0.50 | 0.90～1.60 | ≤0.035 | ≤0.035 | ≥0.015 | 0.02～0.05 | 0.05～0.10 | ≤0.02 | ≤0.20 | ≤0.40 |
牌号 | 化学成分 | ||||||||||
c | si | mn | s | p | als | nb | v | ti | cr | ni | |
e | ≤0.18 | ≤0.35 | 0.70～1.20 | ≤0.035 | ≤0.035 | ≥0.015 | / | / | / | / | / |
eh32 eh36 | ≤0.50 | 0.90～1.60 | 0.02～0.05 | 0.05～0.10 | ≤0.02 | ≤0.20 | ≤0.40 | ||||
牌号 | 化学成分，% | ||||||||||
c | si | mn | p | s | als | nb | v | ti | cr | ni | |
ah32/36/40 dh32/36/40 eh32/36/40 | ≤0.18 | ≤0.50 | 0.90～1.60 | ≤0.035 | ≤0.035 | ≥0.015 | 0.02～0.05 | 0.05～0.10 | ≤0.02 | ≤0.20 | ≤0.40 |
fh32/36/40 | ≤0.16 | ≤0.50 | 0.90～1.60 | ≤0.025 | ≤0.025 | ≥0.015 | 0.02～0.05 | 0.05～0.10 | ≤0.02 | ≤0.20 | ≤0.80 |
3.3 力学性能
表2 力学性能要求
等级 | 屈服强度 mpa | 抗拉强度 mpa | 延伸率 % | 冲击功akv，j/cm2 | ||||
温度 ℃ | ≤50mm | 50＜t≤60mm | ||||||
纵向 | 横向 | 纵向 | 横向 | |||||
a | ≥235 | 400～520 | ≥22 | 20 | - | - | ≥34 | ≥24 |
b | 0 | ≥27 | ≥20 | |||||
d | -20 | |||||||
牌号 | 屈服强度 mpa | 抗拉强度 mpa | 延伸率 % | v型冲击功，j | 冷弯 180° | ||||
温度 ℃ | ≤50mm | 50＜t≤60mm | |||||||
纵向 | 横向 | 纵向 | 横向 | ||||||
ah32 | ≥315 | 440～570 | ≥22 | 0 | ≥31 | ≥22 | ≥38 | ≥26 | d=2a |
dh32 | -20 | ||||||||
ah36 | ≥355 | 490～620 | ≥21 | 0 | ≥34 | ≥24 | ≥41 | ≥27 | |
dh36 | -20 | ||||||||