ASTM A131/A131M A131 Grade DH40 Introduce
ASTM A131/A131M A131 Grade DH40 is a standard specification for structural steel shapes, plates, bars, and rivets primarily used in shipbuilding and other maritime applications. It is produced under ASTM International's jurisdiction. ASTM A131/A131M A131 Grade DH40 is a kind of alloy steel that is used in applications where resistance to corrosion is an important factor in design.
Smelting temperature:1643°C - 1443°C
Application:Structural steel for seagoing
ASTM A131/A131M A131 Grade DH40 Material Chemical Composition
The chemical composition of the ASTM A131/A131M A131 Grade DH40 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Vanadium (V) | 0.0500 | 0.1000 |
| Titanium (Ti) | - | 0.0200 |
| Silicon (Si) | 0.1000 | 0.5000 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | - | 0.4000 |
| Niobium (Nb) | 0.0200 | 0.0500 |
| Molybdenum (Mo) | - | 0.0800 |
| Manganese (Mn) | 0.9000 | 1.6000 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | - | 0.2000 |
| (CEV) | - | 0.4000 |
| Carbon (C) | - | 0.1800 |
| Aluminum (Al) | 0.0150 | - |
ASTM A131/A131M A131 Grade DH40 Material Mechanical Properties
ASTM A131/A131M A131 Grade DH40 steel is a special type of steel used in shipbuilding and marine engineering. This type of steel has a unique set of chemical and physical properties that make it an excellent choice for these applications. Many of its characteristics also make ASTM A131/A131M A131 Grade DH40 steel an appealing building material for other industries as well.
The mechanical properties of the ASTM A131/A131M A131 Grade DH40 steel are as follows:
| YieldRp0.2 | ≤ 146 (MPa) |
| TeileRm | ≤ 616 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 144 |
ASTM A131/A131M A131 Grade DH40 Material Thermal Properties
The thermal performance parameters of the ASTM A131/A131M A131 Grade DH40 steel are as follows:
| Temperature (°C) | 44 | 435 | 649 |
| Modulus of elasticity (GPa) | - | 635 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 334 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 323 |
| Poisson’s coefficient, ν | - | - | 431 |
ASTM A131/A131M A131 Grade DH40 Material Machining Technology
When machining ASTM A131/A131M A131 Grade DH40 steel, the process begins with the selection of the right type of cutting tool. Once the cutting tool is selected, the process will involve a series of operations to shape the material.