What is BS 131-5 – Notched bar tests about?
BS 131-5 standard is a part of the BS 131 series that discusses the determination of crystallinity for notched bar tests. With the notched-bar impact testing, we determine the toughness of a metallic or polymeric material under various temperature conditions.
BS 131-5 describes methods for determining the percentage of crystallinity in the fractures of notched bar test pieces of carbon, carbon-manganese and low-alloy steel, with particular reference to test pieces of the forms specified in BS 1311), BS 131-1, BS 131-2 and BS 131-3.
Who is BS 131-5 – Notched bar tests for?
BS 131-5 on crystallinity applies to:
- Manufacturer of Izod testing machine
- Quality maintenance personnel
- Engineering physics
Why should you use BS 131-5 – Notched bar tests?
In notched-bar impact testing, we determine the toughness of a metallic or polymeric material under various temperature conditions. Crystallinity defines the degree of long-range order in a material, and strongly affects its properties. The more crystalline a polymer, the more regularly aligned its chains. Increasing the degree of crystallinity increases hardness and density.
BS 131-5 provides you with the determination of crystallinity in which the percentage crystallinity is estimated by one of the following methods:
- Direct visual estimation
- Direct measurement
- Measurement with magnification
Overall, the crystalline area helps you in determining by the use of gratitude in the eyepiece of an ordinary monocular or binocular low-powered microscope. BS 131-5 provides you with comprehensive guidance useful throughout the process of notched bar tests.