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A179 is an ASTM standard specification for seamless cold-drawn low-carbon steel tubes for heat exchangers and condensers. It is not a standard grade for "round bar". Round bars of similar low-carbon composition are typically supplied under standards such as ASTM A29 for general purpose.
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X42 Carbon steel round bar is the round bar with steel grade of X42.
Round steel has relatively high strength, high hardenability and very good toughness, so its pressure bearing capacity is also guaranteed. Even if it is used at high temperature, the creep strength is high and the durability is also guaranteed.
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A53 is an ASTM standard specification for welded and seamless steel pipe. It is not a standard grade for "round bar". Round bars of similar composition are typically supplied under standards such as ASTM A36 for structural shapes or ASTM A29 for hot-rolled carbon steel bars.
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A214 is an ASTM standard specification for resistance welded carbon steel heat-exchanger and condenser tubes. It is not a standard grade for "round bar".
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192 is the steel of carbon structural steel, which is a kind of alloy steel and carbon steel. The carbon content is about 0.05%~0.70%, and some can reach up to 0.90%. It can be divided into ordinary carbon structural steel and high-quality carbon structural steel.
Round steel has relatively high strength, high hardenability and very good toughness, so its pressure bearing capacity is also guaranteed. Even if it is used at high temperature, the creep strength is high and the durability is also guaranteed.
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ST37 is a German standard (now superseded by EN 10025-2 S235JR) for structural steel sections and plates. Round bars of equivalent material are typically supplied as S235JR under standards for steel bars, not under the "ST37" designation for plates/sections. The description about cold-rolled strip and high surface finish pertains to cold-rolled sheet/coil products, not to structural round bars.
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A106Gr. B Carbon steel round bar
A106 GrB strength grade 415MPa. ASTM A106Gr. B carbon steel round bar is a kind of low carbon steel widely used in petroleum, chemical and boiler industries. The material has good mechanical properties. Carbon steel round bar for high-temperature operation ASTM A106 GR. B, steel grade: SA106B, Specification: 1/4 ″ - 28 ″, 13.7-711.2mm Steel grade: GRAD B, Standard: ASTM A106 - American Society for Testing and Materials.
Round steel has relatively high strength, high hardenability and very good toughness, so its pressure bearing capacity is also guaranteed. Even if it is used at high temperature, the creep strength is high and the durability is also guaranteed.
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Ordinary low alloy steel is a kind of ordinary alloy steel containing a small amount of alloy elements (in most cases, the total amount of w does not exceed 3%). This kind of steel has high strength, good comprehensive properties, corrosion resistance, wear resistance, low temperature resistance, and good cutting and welding properties.
Under the condition of saving a lot of rare alloy elements (such as nickel and chromium), usually 1 t ordinary low alloy steel can be used for 1.2-1.3 t carbon steel, and its service life and scope of use are much longer than carbon steel. Ordinary low alloy steel can be smelted in open hearth furnace and converter with general smelting method, and the cost is close to that of carbon steel
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