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ASTM A131 Grade A Shipbuilding steel plate is common strength shipbuilding plate which is mainly used for built hull of vessels, ship body construction.
Normally when rolling, Air rolled and Control Rolled is ok for ship plate A131 Grade A with the thickness equal and bellows 40 Millimeters, and for thickness above 40mm, the heat treatment shall be Normalize or TMCP, these two technical treatment would improve steel strength in yield and tensile points.
A131 Grade A Chemical Composition
|
Grade |
The Element Max (%) |
|||||
|
C |
Si |
Mn |
P |
S |
C+Mn/6 |
|
|
A131 GRADE A |
0.21 |
0.50 |
2.5*C |
0.035 |
0.035 |
0.40 |
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】%
A131 Grade A Mechanical Property:
|
Grade |
|
Mechanical Property |
Charpy V Impact Test |
||||
|
Thickness |
Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
|
|
A131 GRADE A |
mm |
Min Mpa |
Mpa |
Min % |
20 |
J |
J |
|
t≤50 |
235 |
400-520 |
21% |
- |
- |
||
|
50＜t≤70 |
235 |
400-520 |
21% |
17 |
25 |
||
|
70＜t≤100 |
235 |
400-520 |
21% |
20 |
30 |
||
|
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
|||||||
ASTM A131 Grade A 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.
GB T 5312 Carbon and carbon-manganese steel seamless steel tubes and pipes are mainly for ship use, also known as shipbuilding steel pipes. Under GB T 5312, there are mainly 5 steel grades: grade 320, 360, 410, 460 and 490. Each grade covers three levels: I, II, III.
Angle steel, commonly known as angle iron, is a long strip of steel whose sides are perpendicular to each other. There are equal angle steels and unequal angle steels. The two sides of equal angle steel are equal in width. The unequal angle steel is also known as L shape profile steel.
Flat bar steel can be produced according to the user's needs, with fixed thickness, width and length. It can reduce the cutting process for users, reduce the consumption of labor and materials, and also reduce the processing loss of raw materials.
Bulb flat steel for shipbuilding
The bulb flat steel is a kind of medium section material which is mainly used in the field of shipbuilding and bridge building, and the shipbuilding bulb flat steel is an auxiliary medium section material for shipbuilding.
The steel for shipbuilding and oil platform---FH40, is the high tensile strength steel.The shipbuilding steel FH40 is the Hull structural steel.We can provide FH40 shipbuilding steel plate price.
The steel for shipbuilding and oil platform---EH40, is the high tensile strength steel.The shipbuilding steel EH40 is the Hull structural steel.We can provide EH40 shipbuilding steel plate price.
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BBN SHIP STEEL FACTORY
