20g Steel Pipe

20 G boiler carbon steel pipe and 20 g high pressure boiler tube, belongs to the high quality carbon structural steel pipe.
(1) the high quality carbon structural steel grade 20 g, MNG, 20 MNG.
(2) 15 mog, alloy structural steel pipe grade 20 crmog mog, 12, 15 crmog, 12 cr2mog, 12 cr1movg, 12 cr3movsitib, etc.
(3) corrosion and heat resistant steel used cr18ni9, 1 cr18ni11nb boiler tubes, in addition to ensure that the chemical composition and mechanical properties by root do water pressure test, flaring, flattening test. Steel tube to heat treatment state delivery.
In addition, the microstructure and grain size of finished steel pipe, the decarburization layer also has certain requirements.
High quality carbon structural steel is rely on adjust the amount of carbon (C) to improve the mechanical properties of steel, therefore, according to the carbon content of high and low, this kind of steel can be divided into:
Low carbon steel, carbon content less than 0.25% generally, such as 10, 20 steel, etc.;
Medium carbon steel, carbon content is in commonly between 0.25 ~ 0.60%, 35, 45 steel, etc.;
High carbon steel, carbon content is generally greater than 0.60%. This kind of steel is generally not used in the manufacture of steel pipe.
In fact, carbon content and no obvious boundaries between them.
Such steel production is bigger, USES broad, rolling (forging) more commonly made into round, square, flat profiles, such as plate and seamless steel tube. Mainly used in the manufacture of general structure and the mechanical structure parts, components and building structure and pipe conveying fluid. According to the requirement, sometimes need to heat treatment (normalizing or conditioning) after use.
High pressure boiler seamless steel tube (GB5310-2008) is used in the manufacture of high pressure and over pressure of the water tube boiler heating surface quality carbon steel pipe, alloy steel and heat resistant stainless steel seamless steel tube.
Specifications and appearance quality: GB5310-08 the high pressure boiler seamless steel tube of hot-rolled tube 22 ~ 530 mm outside diameter, wall thickness ranging from 20 to 70 mm. Cold drawn 10 to 108 mm (cold rolled) pipe diameter, wall thickness range 2.0 ~ 13.0 mm.
High quality carbon structural steel pipe is rely on adjust the amount of carbon (C) to improve the mechanical properties of steel, therefore, according to the carbon content of high and low, this kind of steel can be divided into:
Low carbon steel, carbon content less than 0.25% generally, such as 10, 20 steel, etc.;
Medium carbon steel, carbon content is in commonly between 0.25 ~ 0.60%, 35, 45 steel, etc.;
High carbon steel pipe, carbon content is generally greater than 0.60%. This kind of steel is generally not used in the manufacture of steel pipe.