The purpose of this article is to discuss the chemical compositions of stainless steel and heat-resistant steel thick plates, thin plates and steel strips as per Standards Australia AS 1449/2-1983.
The Standard AS 1449/2-1983 describes the chemical compositions of these thick plates, thin plates and steel strips. It gives criteria for the following chemical elements: carbon, manganese, phosphorus, sulphur, silicon, chromium, nickel, molybdenum, titanium, niobium and nitrogen.
The Standard also sets the maximum and minimum amounts of the above chemical elements for different grades of stainless steel and heat-resistant steel thick plates, thin plates and steel strips. For example, the maximum amount of manganese for Grade 304 plate or strip is 2.00 % and the minimum amount of nickel for Grade 309 plate or strip is 8.00%.
The Standard also sets the maximum and minimum total non-metallic impurities for different grades of these thick plates, thin plates and steel strips. For example, the maximum total non-metallic impurities for Grade 304 plate or strip is 0.075 % and the minimum total non-metallic impurities for grade 309 plate or strip is 0.060 %.
The Standard sets the maximum and minimum limits of specific mechanical properties for the various grades of these thick plates, thin plates and steel strips. These properties include tensile strength, yield strength and elongation.
The Standard also specifies the minimum bend diameter and the maximum bend force that should be used to bend the different grades of these thick plates, thin plates and steel strips.
The Standard sets the bend limit of the thick plates and the thin plates for different grades. It also sets the bends for edges of the thick plates and the thin plates for different grades.
The Standard also provides detailed requirements and guidance on spark test and grain size measurement for the different grades of these thick plates, thin plates and steel strips.
Finally, the Standard sets out the requirements concerning the marking and packaging of the different grades of these thick plates, thin plates and steel strips.
In conclusion, the Standard AS 1449/2-1983 sets out detailed requirements and guidance on the chemical compositions, mechanical properties, bend limit, spark test, grain size measurement, marking and packaging of the different grades of stainless steel and heat-resistant thick plates, thin plates and steel strips. This Standard provides important criteria for ensuring the quality of these products.
