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Both A36 and DH36 steel are shipbuilding steel under ASTM A131/A131M. They have totally same chemical composition and strength. Then What is the difference between A36 and DH36 steel? Let us check together.
The difference between A36 and DH36 steel chemical composition
| Grade | C | Si | Mn | P | S | Cu | Cr | Ni | Nb | V | Ti | Mo | Als |
| A36 | ≤0.18 | ≤0.50 | 0.90-1.60 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.20 | ≤0.40 | 0.02-0.05 | 0.05-0.10 | ≤0.02 | ≤0.08 | ≥0.015 |
| DH36 | ≤0.18 | ≤0.50 | 0.90-1.60 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.20 | ≤0.40 | 0.02-0.05 | 0.05-0.10 | ≤0.02 | ≤0.08 | ≥0.015 |
The difference between A36 and DH36 steel mechanical properties
| Grade | Tensile Test | Impact Energy KV2/J | ||||
| Yield Strength ReH/Mpa | Tensile Strength Rm/Mpa | Elongation A/% | Temperature ℃ | Longitudinal | Transverse | |
| A36 | ≥355 | 490-620 | ≥21 | 0 | ≥34 | ≥24 |
| DH36 | ≥355 | 490-600 | ≥21 | -20 | ≥34 | ≥24 |
From above tables, we find the impact temperature of A36 and DH36 steel is different. A36 steel do 0℃ impact test, while DH36 steel do -20℃impact test. Therefore, though both A36 and DH36 steel are shipbuilding steel, they are used under different environment. The DH36 steel do well in lower temperature working conditions.
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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