LR Grade DH69 Shipbuilding steel plate is mainly used to Shipbuilding Project and Ocean Offshore Structural Project.
Other Name
LR Grade DH69 Shipbuilding steel plate, LR Grade DH69 Ship steel plate, LR Grade DH69 Marine steel plate, LR Grade DH69 steel plate .
Additional Condition
UT(Ultrasonic examination), AR(As Hot Rolled only), TMCP(Thermal Mechanical Control Processing), N(Normalized), Q+T(Quenched and Tempered),Z Direction Test(Z15,Z25,Z35), Charpy V-Notch Impact Test, The Third Party Test (such as SGS Test), Coated or Shot Blasting and Painting.
LR DH69 extra high Strength Chemical Composition | |||||||
Grade | The Element Max (%) | ||||||
C | Si | Mn | P | S | Al | N | |
LR DH69 | 0.20 | 0.55 | 1.70 | 0.030 | 0.030 | 0.015 | 0.020 |
Nb | V | Ti | Cu | Cr | Ni | Mo | |
0.02-0.05 | 0.03-0.10 | 0.02 |
|
|
|
| |
Crack Sensitivity: Pcm = (C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B)%
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
LR DH69 extra high strength property | |||||||
Grade |
| Mechanical Property | Charpy V Impact Test | ||||
Thickness | Yield | Tensile | Elongation | Degree | Energy 1 | Energy 2 | |
LR/DH69 | mm | Min Mpa | Mpa | Min % | -20 | J | J |
t≤50 | 690 | 770-940 | 16% | 46 | 69 | ||
50＜t≤70 | 690 | 770-940 | 16% | 46 | 69 | ||
70＜t≤100 | 690 | 770-940 | 16% | 46 | 69 | ||
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal | |||||||
