BS 970/4-1970(1987) Deformed steel part 4: Mechanical properties of stainless steel, heat-resistant steel and valve steel

BS 970/4-1970(1987) Deformation steel Part 4: Mechanical properties of stainless steel, heat resisting steel and valve steel

BS 970/4-1970(1987) Deformation Steel Part 4: Mechanical Properties of Stainless Steel, Heat Resisting Steel and Valve Steel

BS 970/4-1970(1987) is the British Standard for metal deformation steels. It covers four different classes of metal; stainless steel, heat resisting steel, valve steel, and ordinary steel. It specifies the requirements for mechanical properties, chemical composition, physical properties and metallurgical properties of these steels.

The standard covers four categories of metal deformation steels: stainless steel, heat resisting steel, valve steel and ordinary steel. Stainless steel is alloyed with chromium and other alloying elements to give it increased corrosion, heat and wear resistance. Heat resisting steel is alloyed with chromium and molybdenum and other elements to give it improved creep strength, oxidation resistance and thermal conductivity. Valve steel is alloyed with nickel and other elements to increase its strength, toughness and fatigue resistivity. Ordinary steel is simple carbon steel with minimal alloying elements.

The standard requires each metal to meet certain minimum hardness, yield strength, tensile strength, elongation and shear strength requirements. The mechanical properties are determined by conducting destructive testing on test samples. Chemical analysis is also required to determine the alloy content. Physical properties such as density, thermal expansion, and electrical resistivity are also specified. Metallurgical testing, such as chemical composition, microstructural analysis, or grain size analysis are also performed to assess the characteristics of the steel.

The standard is used globally to specify the mechanical properties of stainless steels and other alloys used in manufacturing and engineering applications. It provides guidance in the selection of materials and provides minimum requirements to ensure that the materials provide the desired performance over their lifetime. The standard is regularly updated to reflect advances in manufacturing and engineering technologies.

BS 970/4-1970(1987) is a British Standard that defines the mechanical properties of stainless steel, heat-resistant steel and valve steel.

The standard is divided into four parts: Part 1 covers steel identification, part 2 covers general requirements, part 3 covers chemical analysis and part 4 covers mechanical properties. The mechanical properties covered are yield strength, tensile strength, elongation and hardness. The standard also specifies tolerances for these values.

The standard is applicable to non-alloy steel, alloy steel, heat-resistant steel and valve steel. These materials are commonly used in parts and components of machinery, such as valves and machine parts. BS 970/4-1970(1987) provides a range of mechanical properties for various grades of stainless steel, heat-resistant steel and valve steel so users can select the material suitable for their purposes.

The standard is regularly updated, as technology and materials advance. This ensures that it remains up to date and remains relevant for modern day applications. The British Standards Institution is responsible for the maintenance and updating of the standard.

BS 970/4-1970(1987) is an essential standard for manufacturers, engineers and other professionals who specify, purchase or use steel parts or components. It is relevant to a wide range of industries and applications, including machinery, process engineering and component manufacture.