Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

Q345B thick walled steel pipe


Q345B thick-walled steel pipe
1, the steel quality classification
(1) ordinary steel (P ≤ 0.045%, S ≤ 0.050%)
(2) excellent steel steel (P, S ≤ 0.035%)
(3) High quality steel (P ≤ 0.035%, S ≤ 0.030%)
2, according to the chemical composition of classification
(1) carbon steel: steel of a low carbon steel (C ≤ 0.25%); b. Medium carbon steel (C ≤ 0.25 to 0.60%); c of high-carbon steel (C ≤ 0.60%).
(2) alloy: a low alloy steel (alloy elements the total content of ≤ 5%); b medium alloy steel (alloying elements the total content of> 5 to 10%); c of high-alloy steel (the total content of alloying elements> 10 %).
3, steel forming methods:
(1) forged steel; (2) Steel; (3) hot-rolled steel; (4) cold-drawn steel.
4, the steel microstructure Category
(1) annealed state: a. Alkylene eutectoid steel (ferrite + pearlite); b a eutectoid steel (pearlite); c. Over total steel eutectoid steel (pearlite + cementite); d. ledeburite (pearlite + cementite).
(2) normalizing the state: a pearlitic steel; b bainitic steel; c martensitic steel; d. Austenitic steels.
(3) steel no phase change or phase transition
5, use classification
(1) the construction and engineering steel: a plain carbon structural steel; b low-alloy structural steels; c reinforced steel.
(2) steel structural steel
a. the mechanical manufacturing steel: (a) quenched and tempered structural steel; (b) surface hardened structural steel: including the carburizing steel seepage ammonia steel surface hardening steel; (c)-cutting structural steel; (d) cold plastic forming of steel: cold stamping steel, cold heading steel.
b spring steel
c. bearing steel
Q345B thick-walled steel pipe
(3) tool steel: a carbon tool steel; b alloy tool steel; c high-speed tool steel.
(4) Special performance steel: a resistant stainless steel; b heat-resistant steel: including antioxidant steel, heat resistant steel, valve steel; c. Electrothermal alloy steel; d. Wear-resistant steel; e cryogenic steel ; f electrical steel.
(5) professional steel - such as bridge steel, shipbuilding, steel, boiler steel, pressure vessel steel, agricultural steel.
6, the overall classification
(1) ordinary steel
a. carbon structural steel: (a) Q195; (b) Q215 (A, B); (c) Q235 (A, B, C); (e) Q275 (d) Q255 (A, B);
low alloy structural steel
c. specific uses ordinary structural steel
(2) high-quality steel (including high-quality steel)
a steel structural steel: (a) high-quality carbon structural steel; (b) alloy structural steel; (c) spring steel; (d) cutting steel; (e) bearing steel; (f) quality structural steel for a particular purpose.
tool steel: (a) carbon tool steel; (b) alloy tool steel; (c) high-speed tool steel.
c. a special performance steel: (a) acid-resistant stainless steel; (b) heat-resistant steel; (c) electric alloy steel; (d) electrical steel; (e) high manganese wear-resistant steel.

上一篇:galvanized steel pipe processing technology and principle

下一篇:Cr5Mo alloy steel pipe Weight schedule

 Copyright ©2012 New SindaIf you do not find the information you need, Click Here  Get Support

New Update Pipe List

    ASTM A53/ASME SA53 Seamless steel pipe
    ASTM A53/ASME SA53(GR.A/GR.B/GR.C) pipe include:, Black steel pipe,Welded steel pipe, Seamless steel pipe Common: ASTM A53/ASME SA53 Can quickly deliver diverse grades of steel pipes, like A53 Grade.A, A53 Grade.B and other people. Short Introduction ASTM.

    NEWSINDA SEAMLESS STEEL PIPES Products:Boiler and Heat Exchanger TubesPressure Tubes and Line PipeMechanical TubesAutomotive TubesHollows for redraw.

    API 5CT N80 P110 114.3mm pipe for oil field
    API 5CT N80 P110 114.3mm petroleum casing pipe.

    OCTG Casing Tubing
    OCTG Casing Tubing,Seamless API 5CT casing pipe / tubing / coupling Standard: API 5CT Size: 1.05''-----4-1/2'' Material: H40, J55, K55, N80, L80, P110 etc. Pipe end: EU, NU Length Range: R1, R2, R3 Application: For transportation.
Contact Us Online To Serve You Better

Hot Click PRO

    Longitudinal Welded Pipe
    Longitudinal Welded Pipe,Welded steel pipe is steel plate with the bending deformation of round, square and other shapes and then welded into the surface of the pipe joints. Welded steel pipe used is steel or steel billets. We supply of weld. gas pipelines,Dynamic simulation tools for multiphase oil an
    API5L Oil/gas Pipeline/Spiral Welded Steel Pipe OD: 219.1 mm - 3048mm for conveying water,drainage,coal gas etc. steel pipe mechanical properties
    steel pipe mechanical properties Is to ensure that the steel pipe end-use properties (mechanical properties), an important indicator, it depends on the chemical composition and heat treatment of steel pipe system. Steel pipe standards, depen. JIS STK steel pipe G3444 G3445
    JIS G3444 STK steel pipe,2.Size:13.7-812mm 3.Material:JIS G3444 STK400/490/500/540/290 .JIS STK steel pipe G3444 G3445.