Company Dynamic

August 19, 2022

Differences between the characteristics of different grades of alloy steel pipes, and application cases

Differences between the characteristics of different grades of alloy steel pipes, and application cases 12CrlMoV This steel has the characteristics of creep limit and lasting strength values are similar, in the long-term stretch, it has high plasticity, its oxidation resistance and thermal strength are higher than 2CrMoV, and the workmanship and weldability are good (preheating before welding, post-welding heat treatment to eliminate stress), generally used after normalizing and high temperature tempering Used to manufacture superheated steel pipes, conduits, radiator tubes and related forgings in high-pressure equipment with working temperatures not exceeding 570 ~ 585 °C 25Cr2MoVA medium carbon heat-resistant steel, […]
August 12, 2022

A691Gr2-1 / 4CrCL22 high temperature and high pressure steel pipe

First, SA691Gr2-1/4CrCL22 is mainly used as welded pipe for power equipment A691 grade is mainly used for high temperature and high pressure carbon steel and alloy steel point melt welded steel nominal pipe Second, SA691 is a high temperature and high pressure reconsideration condition with electric fusion welding steel and alloy steel standards, the grade of steel pipe reaches SA691Gr2-1/4Cr, to go through the effect force treatment, radiographic inspection and water pressure test. SA691Gr2-1/4CrCL22 is a kind of CR-MO heat-resistant steel, the basic components are 2.25% CR, 1% MO. Equivalent to the seamless tube SA-335P22, Maigang A691 is used as […]
August 12, 2022

Introduction to A335 P91 Alloy Pipe- 10Cr9Mo1VNb

A335 refers to the executive standard: ASTM A335 seamless ferritic alloy steel pipe for high temperature P91 is a material in the ASTM A335 standard: I. Introduction to 10Cr9Mo1VNb: 10Cr9Mo1VNb is equivalent to T91 or P91 and implements the standard ASTM A213 ASTM A335. 10Cr9Mo1VNb not only has high oxidation resistance and high temperature steam corrosion resistance, but also has good impact toughness and high and stable durability plasticity and thermal strength. When the use temperature is lower than 620 °C, 10Cr9Mo1VNb uses a higher stress than austenitic stainless steel. Above 550 °C, the recommended design uses stresses approximately twice […]
July 15, 2022

Quality requirements for seamless steel pipes

(1) Quality requirements ①Chemical composition of steel: The chemical composition of steel is one of the most important factors affecting the performance of seamless steel pipes, and it is also the main basis for formulating process parameters for rolling and heat treatment of steel pipes. Alloying elements: intentionally added, according to application Residual elements: brought into steelmaking, properly controlled Hazardous elements: strictly controlled (As, Sn, Sb, Bi, Pb), gases (N, H, O) Out-of-furnace refining or electroslag remelting: improve the uniformity of the chemical composition in the steel and the purity of the steel, reduce the non-metallic inclusions in the billet […]
July 9, 2022

erw ,roll bending pipes,sprial pipes,different manufacturing processes

pdf downloads: welded pipes different manufacturing processes MAJOR PODUCTION USAGE: The manufacturing process of different welded pipes,Comparison table of steel pipe manufacturing standard grades in different countries. pdf  downloads:02.Comparison table of steel pipe manufacturing standard grades in different countries