SSAW steel pipe is widely used in natural gas, petroleum, chemical industry, power, heat, water supply and drainage, steam heating, pressure steel pipe for hydropower station, thermal power generation, water and other long-distance transmission pipelines and piling, dredging, Bridges, steel structures and other engineering fields.

SSAW steel pipe is widely used in natural gas, petroleum, chemical industry, power, heat, water supply and drainage, steam heating, pressure steel pipe for hydropower station, thermal power generation, water and other long-distance transmission pipelines and piling, dredging, Bridges, steel structures and other engineering fields.

Carbon steel pipe is a kind of steel pipe with carbon as the main alloying element, and its carbon content is between 0.12% and 2.0%, which makes carbon steel pipe have good mechanical properties and processing properties, while the price is relatively low, and is widely used in various fields. Carbon steel pipe is characterized by high strength, high hardness, good wear resistance, and has good weldability and cold and hot processing properties, has been widely recognized and applied. Carbon steel pipes can be seen in construction, manufacturing, transportation, petroleum, chemical and other industries.

There are many types of carbon steel pipes, which can be divided into the following categories according to different characteristics and uses:

Seamless carbon steel pipe. Seamless carbon steel pipe is a kind of pipe with high manufacturing process requirements, made by hot rolling or cold drawing process, with smooth internal and external surfaces, accurate size, high compressive strength characteristics, widely used in oil, natural gas, chemical industry, nuclear energy and other fields.
Weld carbon steel tubes. Welded carbon steel pipe is rolled into a tube by the welding process, and then welded, the production process is relatively simple, low cost, suitable for general pressure requirements are not high occasions.
Galvanized carbon steel pipe. Galvanized carbon steel pipe is coated with a layer of zinc on the surface of carbon steel pipe to improve corrosion resistance and extend service life, especially suitable for pipelines exposed to wet corrosion environment.
Low temperature carbon steel pipe. Low temperature carbon steel pipes are suitable for pipes working under low temperature conditions, can withstand lower temperatures and pressures, and usually have higher toughness and impact strength.
High pressure carbon steel pipe. High pressure carbon steel pipe is used to withstand high pressure pipe system, can withstand higher pressure.
Structural carbon steel pipe. Structural carbon steel pipe is suitable for building structures and mechanical manufacturing pipes, often used to build frames, supports and brackets and other components.

SA387Gr12CL2 steel is a pearlitic heat-resistant steel with high thermal strength (δb≥440MPa) and oxidation resistance at high temperatures, and has a certain ability to resist hydrogen corrosion. Due to the high content of Cr, C and other alloying elements in the steel, the hardening tendency of the steel is obvious.

AISI 4142 steel is ultra-high strength steel, with high strength and toughness, hardenability is also good, no obvious tempering brittleness, high fatigue limit and resistance to multiple shocks after tempering treatment, low temperature impact toughness is good. The steel is suitable for manufacturing large and medium-sized plastic molds requiring certain strength and toughness. High strength, hardenability, good toughness, small deformation during quenching, high creep strength and lasting strength at high temperature. It is used to manufacture forgings requiring higher strength and larger tempering cross-section than 35CrMo steel, such as large gear for locomotive traction, supercharger transmission gear, pressure vessel gear, rear shaft, connecting rod and spring clamp with great load, and can also be used for drilling pipe joints and fishing tools in oil deep Wells below 2000m, and can be used for bending machine molds.

ASTM 4140 is the standard steel number of GB in China, 40Cr steel is one of the most widely used steel in the machinery manufacturing industry. It has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity after tempering. Steel hardenability is good, water quenching can be quenched to 28 ~ 60mm, oil quenching can be quenched to 15 ~ 40mm. In addition to tempering treatment, this steel is also suitable for cyaniding and high-frequency quenching treatment. When the hardness is 174 ~ 229HB, the relative machinability is 60%. The steel is suitable for making medium-sized plastic molds and shaft accessories.