The role of five elemental analysis instruments on steel elements The five elemental analysis instruments focus on the role of various elements of steel: 1,            Carbon (c): Carbon can increase the cold brittleness and ageing sensitivity of steel, and also reduce the atmospheric corrosion resistance of steel. The amount of carbon in the steel increases, the yield point and tensile strength increase, and the plasticity and impact resistance decrease. When the carbon content exceeds 0.23% , the weldability of the steel deteriorates. The low-alloy structural steel used for welding generally does not contain more than 0.20% carbon. 2,            Sulfur ( S ): Sulfur is a harmful element in general, which causes hot brittleness of steel, reduces ductility and toughness of steel, and causes cracks during forging and rolling. Sulfur is also detrimental to weldability and reduces corrosion resistance. Therefore, the sulfur content is usually less than 0.055% , the high-quality steel requirement is less than 0.040% , and 0.08-0.20% sulfur is added to the steel to improve the machinability. It is usually called free-cutting steel. 3,            Silicon ( Si ): Silicon is added as a reducing agent and a deoxidizing agent during the steel making process, so the killed steel contains 0.15%-0.30% of silicon. An increase in the amount of silicon will reduce the weldability of the steel. If the silicon content in the steel exceeds 0.50% - 0.06% silicon is an alloying element. Silicon can significantly increase the steel's elastic limit, yield point and tensile strength, and is commonly used as spring steel. Adding 1.0-1.2% silicon to the quenched and tempered structural steel increases the strength by 15-20% . Silicon combined with molybdenum, tungsten, chromium, etc., has the effect of improving corrosion resistance and oxidation resistance, and can manufacture heat-resistant steel. Silicon-containing 1-4% low carbon steel, with high magnetic permeability, used in the electrical industry to make silicon steel sheets. 4,            Manganese ( Mn ): In the process of steel making, the general steel contains 0.30-0.50% of manganese, which is a good deoxidizer and desulfurizer. When adding more than 0.70% of manganese to carbon steel, it is considered “manganese steel â€, which has sufficient toughness compared with steel of general steel, and has higher strength and hardness, improves the quenchability of steel, and improves the hot workability of steel. It is usually used for excavator buckets, ball mill liners, etc. The increase in the amount of manganese reduces the corrosion resistance of the steel and reduces the weldability. 5,            Phosphorus ( P ): In general, phosphorus is also a harmful element in steel, which increases the cold brittleness of steel, deteriorates weldability and cold bending performance, and reduces plasticity. Therefore, the phosphorus content is usually required to be less than 0.045% . High quality steel requires a lower phosphorus content.   For more product information, please visit the following website High-frequency infrared carbon and sulfur analyzer http:// Infrared carbon sulfur meter http:// Elemental Analyzer http:// Multi-element analyzer http:// Spark direct reading spectrometer http:// Carbon and sulfur analysis instrument http://  Nanjing Qilin Scientific Instrument Group Co., Ltd. Testing Center Â