ASTM A387/A387M Grade 11 Class 1 Introduce
The ASTM A387/A387M Grade 11 Class 1 steel plates are widely used in the automotive, construction and transport industries because of their superior strength and durability. The plates have excellent formability and can be readily welded using the standard methods. The welds are strong and durable, and the plates have excellent corrosion resistance. The plates also have a good resistance to temperature, making them ideal for use in industrial and commercial applications.
Smelting temperature:1237°C - 1938°C
Application:Pressure vessel plate, alloy steel, chrome molybdenum
ASTM A387/A387M Grade 11 Class 1 Material Chemical Composition
The chemical composition of the ASTM A387/A387M Grade 11 Class 1 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Molybdenum (Mo) | 0.4500 | 0.6500 |
| Chromium (Cr) | 1.0000 | 1.5000 |
| PhOsphorus (P) | - | 0.0350 |
| Sulfur (S) | - | 0.0350 |
| Manganese (Mn) | 0.4000 | 0.6500 |
| Silicon (Si) | 0.5000 | 0.8000 |
| Carbon (C) | 0.0500 | 0.1700 |
| Silicon (Si) | 0.4400 | 0.8600 |
| Sulfur (S) | - | 0.0250 |
| PhOsphorus (P) | - | 0.0250 |
| Molybdenum (Mo) | 0.4000 | 0.7000 |
| Manganese (Mn) | 0.3500 | 0.7300 |
| Chromium (Cr) | 0.9400 | 1.5600 |
| Carbon (C) | 0.0400 | 0.1700 |
ASTM A387/A387M Grade 11 Class 1 Material Mechanical Properties
ASTM A387/A387M Grade 11 Class 1 steel has a good impact resistance. This material can withstand up to 20 Joules of impact energy before it begins to fail. This impact resistance makes ASTM A387/A387M Grade 11 Class 1 steel well suited for applications where the part must be able to withstand high shock loads, such as construction and industrial applications.
The mechanical properties of the ASTM A387/A387M Grade 11 Class 1 steel are as follows:
| YieldRp0.2 | ≤ 338 (MPa) |
| TeileRm | ≤ 983 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 431 |
ASTM A387/A387M Grade 11 Class 1 Material Thermal Properties
The thermal performance parameters of the ASTM A387/A387M Grade 11 Class 1 steel are as follows:
| Temperature (°C) | 13 | 292 | 911 |
| Modulus of elasticity (GPa) | - | 352 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 13.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 443 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 311 |
| Poisson’s coefficient, ν | - | - | 422 |
ASTM A387/A387M Grade 11 Class 1 Material Machining Technology
When drilling, be sure to start with a shallow hole and slowly increase the depth. This is important to prevent excessive wear on the drill bit or the surface of the object. It is also essential to use plenty of lubrication when drilling and tapping ASTM A387/A387M Grade 11 Class 1 steel. This helps keep the drill cool and reduces friction, which in turn helps reduce wear and tear on the drill bit.