ASTM B381 and ASME SB381 are both standards that specify the requirements for titanium and titanium alloy forgings. ASTM B381 is the standard specification for titanium and titanium alloy forgings, while ASME SB381 is the standard specification for titanium forgings.
Both ASTM B381 and ASME SB381 cover the requirements for chemical composition, mechanical properties, dimensions, and tolerances for titanium and titanium alloy forgings. They also specify the methods for testing the forgings, including nondestructive testing and chemical analysis.
These standards are commonly used in industries such as aerospace, chemical processing, and medical devices, where titanium’s unique properties, including its high strength-to-weight ratio and corrosion resistance, make it an ideal material for many applications.
It’s worth noting that ASTM B381 and ASME SB381 are very similar and often used interchangeably. However, ASME standards are specifically developed for use in a pressure vessel and piping applications, while ASTM standards cover a wider range of materials and applications.
ASTM B381 and ASME SB381 specify the dimensions and tolerances for titanium and titanium alloy forgings. The dimensions and tolerances specified in these standards depend on the type of forging and its intended use.
The standard covers a wide range of forgings, including disks, rings, blocks, and shafts, and each type has its own specific dimensional requirements.
For example, the outer diameter of a disk forging may range from 50mm to 1300mm, while the thickness may range from 10mm to 300mm, depending on the grade of titanium used and the intended application.
Similarly, the diameter of a ring forging may range from 100mm to 1800mm, while the height or thickness may range from 25mm to 500mm.
In addition to the dimensions, ASTM B381 and ASME SB381 also specify the tolerances for various dimensions, including length, width, height, and diameter. These tolerances ensure that the forgings meet the required specifications and can be used safely and effectively in their intended applications.
It is important to note that specific dimensional requirements for titanium forgings can vary based on the application and end-use. Therefore, it is always essential to consult the relevant standards and specifications for the specific application requirements.