Massive Selection for Alloy Steel Pipe Gb - Seamless Alloy Steel Boiler Pipes Superheater alloy pipes Heat Exchanger Tubes – Gold Sanon
Massive Selection for Alloy Steel Pipe Gb - Seamless Alloy Steel Boiler Pipes Superheater alloy pipes Heat Exchanger Tubes – Gold Sanon Detail:
It is mainly used to make high-quality alloy steel pipe for high pressure boiler pipe, heat exchanger pipe and super heat pipe
Grade of high-quality Alloy steel: T2,T12,T11,T22, T91, T92 etc.
|Steel Grade||Chemical Composition%|
|C||Si||Mn||P, S Max||Cr||Mo||Ni Max||V||Al Max||W||B|
For T91 other than above also includes Nickel 0.4, Va 0.18-0.25, Ni 0.06-0.10, Ni 0.03-0.07, Al 0.02, Ti 0.01, Zr 0.01. A Maximum, unless range or minimum is indicated. Where ellipses (…) appear in this table, there is no requirement, and analysis for the element need not be determined or reported. B It is permissible to order T2 and T12 with a sulfur content of 0.045 max. C Alternatively, in lieu of this ratio minimum, the material shall have a minimum hardness of 275 HV in the hardened condition, defined as after austenitizing and cooling to room temperature but prior to tempering. Hardness testing shall be performed at mid-thickness of the product. Hardness test frequency shall be two samples of product per heat treatment lot and the hardness testing results shall be reported on the material test report.
|Steel Grade||Mechanical Properties|
|T. S||Y. P||Elongation||Hardness|
|T2||≥ 415MPa||≥ 205MPa||≥ 30%||163HBW(85HRB)|
|T11||≥ 415MPa||≥ 205MPa||≥ 30%||163HBW(85HRB)|
|T12||≥ 415MPa||≥ 220MPa||≥ 30%||163HBW(85HRB)|
|T22||≥ 415MPa||≥ 205MPa||≥ 30%||163HBW(85HRB)|
|T91||≥ 585MPa||≥ 415MPa||≥ 20%||250HBW(25HRB)|
|T92||≥ 620MPa||≥ 440MPa||≥ 20%||250HBW(25HRB)|
Permitted Variations in Wall thickness
|over under over under over under over under|
|seamless, hot finished|
|4inch and under 40 0 35 0 33 0 28 0|
|over 4 inch .. .. 35 0 33 0 28 0|
|seamless, cold finished|
|11/2 and under||20 0|
|over 11/2||22 0|
The permitted variations in wall thickness apply only to tube , except internal-upset tubes, as rolled or cold finished
and before swaging,expanding ,bending,polishing,or other fabricating operations
Permitted Variations in Outside Diameter
|outside diameter （mm)||Pemitted Variation( mm)|
|hot finished seamless tube||over||under|
|4″ (100mm)and under||0.4||0.8|
|Welded tubes and cold finished seamless tubes|
The Steel Pipe Should Be Tested Hydraulically One By One. The Maximum Test Pressure Is 20 MPa. Under The Test Pressure, The Stabilization Time Should Be Not Less Than 10 S, And The Steel Pipe Should Not Leak. Or The Hydraulic Test Can Be Replaced By Eddy Current Testing Or Magnetic Flux Leakage Testing.
Pipes That Require More Inspection Should Be Ultrasonically Inspected One By One. After The Negotiation Requires The Consent Of The Party And Is Specified In The Contract, Other Non-Destructive Testing Can Be Added.
Tubes With An Outer Diameter Greater Than 22 Mm Shall Be Subjected To A Flattening Test. No Visible Delamination, White Spots, Or Impurities Should Occur During The Entire Experiment.
For Pipe Of Grades P91, P92, P122, And P911, Brinell, Vickers, Or Rockwell Hardness Tests Shall Be Made On A Specimen From Each Lot
Product detail pictures:
Related Product Guide:
We insist on offering high-quality creation with superior business enterprise concept, honest revenue plus the greatest and fast service. it will bring you not only the high quality solution and huge profit, but essentially the most significant is usually to occupy the endless market for Massive Selection for Alloy Steel Pipe Gb - Seamless Alloy Steel Boiler Pipes Superheater alloy pipes Heat Exchanger Tubes – Gold Sanon , The product will supply to all over the world, such as: Armenia, Canberra, Mauritius, We insist on "Quality First, Reputation First and Customer First". We are committed to providing high-quality products and good after-sales services. Up to now, our products have been exported to more than 60 countries and areas around the world, such as America, Australia and Europe. We enjoy a high reputation at home and abroad. Always persisting in the principle of "Credit, Customer and Quality", we expect cooperation with people in all walks of life for mutual benefits.
By Gemma from Qatar - 2017.11.01 17:04
We feel easy to cooperate with this company, the supplier is very responsible, thanks.There will be more in-depth cooperation.
By Dee Lopez from Poland - 2017.03.07 13:42