How to distinguish pipe material

Steel is steel carbon content between 0.04% -2.3% of the iron-carbon alloys. In order to ensure its toughness and ductility, the carbon content of not more than 1.7%. The main elements of the steel in addition to iron, carbon, there are silicon, manganese, sulfur, and phosphorus.

Classification of Steel diverse variety of steel products, the main methods are summarized as follows:

1, According to the quality classification of steel
(1) Ordinary steel (P≤0.045%, S≤0.050%)
(2) Quality Steel Material Steel (P, S were ≤0.035%)
(3) High quality steel (P≤0.035%, S≤0.030%)

2, According to chemical composition
(1) Carbon steel: low carbon steel (C≤0.25%); carbon steel (C≤0.25 ~ 0.60%); high-carbon steel (C≤0.60%)
(2) Alloy steel: low-alloy steel (the total content of alloying elements ≤5%); the steel (the total content of alloying elements> 5 ~ 10%); high alloy steel (alloy element total content of> 10... %).

3, According to Steel forming method
(1) Forged;
(2) steel;
(3) hot-rolled steel;
(4) cold drawn steel.

4, Steel microstructure by Category
(1) Annealed state:
a, sub-eutectoid steel (ferrite + pearlite);
b, eutectoid steel (pearlite);
c, analysis over a total steel steel (pearlite + cementite);
d, ledeburite (pearlite + cementite).

(2) Normalizing the status of:

a, pearlite steels;
b, bainitic steel;
c, martensitic steel;
d, austenitic steel

(3) Steel phase transition or in part without phase change

5, By Application
(1) Construction and engineering steels: a plain carbon steel; b low alloy structural steel; c reinforced steel.
(2) Steel structural steel machinery manufacturing steel: (a) the structure of quenched and tempered steel; (b) surface hardening steel: including hardened steel, steel ammonia infiltration, surface hardening of steel; (c) easy to cut structural steel ; (d) cold plastic forming of steel: steel, including cold stamping, cold heading steel. b spring steel;.. c bearing steel
(3) Tool steel: a, carbon tool steel; b, alloy tool steel; c, high speed tool steel.
(4) The special properties of steel: a, stainless steel acid; b, heat-resistant steel: Includes antioxidant steel, heat resistant steel, valve steel; c, electric steel; d, wear-resistant steel; e, cryogenic steel .... ;. f, electrical steel.
(5) Specialty steel - such as bridge steel, shipbuilding steel, boiler steel, pressure vessel steel, steel and other farm machinery.

6, By refining methods classification
(1) Press the furnace Seed
. a open-hearth steel:
(a) an acid open-hearth steel;
(b) the basic open-hearth steel.
b converter steel:
(a) Bessemer steel;
(b) the basic converter steel. Or (a) bottom blowing converter steel;
(b) side-blown converter steel;
(c) BOF steel.
. c EAF: (a) electric arc furnace steel; (b) ESR furnace steel; (c) induction furnace steel; (d) Vacuum furnace steel consumption; (e) electron beam furnace steel.

(2) the extent and cast steel by deoxygenation system points
a, boiling steel; b, semi-killed steel; c, killed steel; d, special killed steel.

Standards for Alloy pipes & tubes

ASTM A213 T91
ASTM A213M-09
Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
ASTM A333 Grade 6 alloy pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation.
Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications.
ASTM A335 P22 is the part of ASTM A335, the pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.
ASTM A335/ASME SA335 standard specication for seamless ferritic alloy-steel pipe for high-temperature service
Related alloy steel products:
Carbon steel flanges
Alloy steel flanges
Alloy steel flange, that is, the main material is alloy steel flange or end flange connectors. It contains alloy steel flange, known as alloy steel flange.
Rare earth alloy wear-resistant tube
Rare earth alloy wear resistant pipe has the characteristics of fast velocity and high flow rate is used for pneumatic, pump slurry, etc.
Wear resistant alloy composite pipe
Wear resistant alloy composite pipe
Wear-resistant alloy steel pipe as the base, lined with ultra-wear-resistant alloy, through the centrifugal casting, metallurgy combined to form a solid.

Alloy steel specification, Standard and identification

Alloy Steel pipe contains substantial quantities of elements other than carbon such as nickel, chromium, silicon, manganese, tungsten, molybdenum, vanadium and limited amounts of other commonly accepted elements such as manganese, sulfur, silicon, and phosphorous.

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ASTM A335 P11 alloy pipe


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