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ISO Approved Manufacturer & Exporter of ASTM A 335/ A691 GR P12 Alloy Steel Seamless & EFW pipes.

Alloy Steel UNS K11562 Pipes, A335 P12 Alloy Steel Seamless Pipe, Alloy Steel ASTM A335 Grade P12 Seamless Pipe Manufacturer, Seamless Ferritic Alloy-Steel P12 Pipe, ASME SA335 Grade P12 Alloy Steel Pipe Supplier in Mumbai, India.


Neminox Steel & Engineering Co. is a major producer and supplier of ASTM A335 P12 Pipe in a wide range of shapes, sizes and dimensions. Welding the material together is a simple process. Welding is simple because of the low carbon concentration. Welding cracking is a common problem with high carbon steel. The nominal bore sizes vary from 1/8NB to 24NB, and the wall thicknesses range from 2mm to 14mm, with exterior dimensions ranging from 19.05mm to 114.3mm. The nominal bore sizes range from 1/8NB to 24NB, and the wall thicknesses range from 2mm to 14mm. The sa335 gr p12 pipes are within the big diameter pipe size category, and they may come in single random, double random or cut to length sizes up to 16000mm. There are a variety of pipe endpoints available, including threaded, plain end, and bevelled end pipe types. The chemical makeup of P11 and P12 pipes distinguishes them from one another.
The chromium concentration in P11 can reach up to 1.25 per cent, and the molybdenum content can reach up to 45 per cent, but the molybdenum content in the P12 grade can reach up to one per cent in the composition. As a result, the ASTM A335 P12 Seamless Pipe has different corrosion resistance and hardness than other seamless pipes. It is estimated that both grades have a minimum tensile strength of 415 MPa and average yield strength of 205 MPa. There are many heat treatment techniques available to improve the hardness of Alloy Steel P12 Pipes, including complete or isothermal annealing, normalized and tempered heat treatment. Please do not hesitate to contact us if you need further information about the items or costs.


Alloy Steel P12 Seamless Pipes

Global Supplier of High Quality Alloy Steel P12 Seamless Pipe, ASTM A335 P12 High Pressure Steel Pipe, Alloy Steel P12 Seamless Pipes, P12 Alloy Steel Boiler Steel Pipe Distributor, Alloy Steel Pipe P12, ASTM A691 Alloy Steel EFW Pipe, P12 High Pressure Steel Pipe Exporter in India.

Specifications of P12 Alloy Steel Boiler Steel Pipe

Specifications ASTM A 335, ASME SA 335
Size 1/8NB TO 24NB IN
Type Seamless
Specialized in Large Diameter Size
Outer Dimensions 19.05mm – 114.3mm
Wall Thickness 2.0mm – 14 mm
Length max 16000mm
Schedule Schedule 20 – Schedule XXS (heavier on request) up to 250 mm thk.
Form Round, Square, Rectangular, Hydraulic Etc.
Length Single Random, Double Random & Cut Length.
Tubing End Plain End, Beveled End, Treaded.

Chemical Composition of ASTM A335/ASME SA335 P12 High Quality Alloy Steel Pipe

C, % Mn, % P, % S, % Si, % Cr, % Mo, %
0.015 max 0.30-0.61 0.025 max 0.025 max 0.50 max 0.80-1.25 0.45-0.65

Mechanical properties of Seamless Heat Exchange Alloy Steel P12 Pipes

Tensile Strength, MPa Yield Strength, MPa Elongation, %
415 min 205 min 30 min

Alloy Steel Pipes & Tubes

Square Pipe Manufacturer

Square Pipe

Round Pipe Supplier

Round Pipe

Rectangular Pipe Supplier

Rectangular Pipe

Heat Treatment Requirements of ASTM A 335 GR P12

  P5, P9, P11, and P22    
Grade Heat Treatment Type Normalizing Temperature Range F [C] Subcritical Annealing 
or Tempering 
Temperature Range F 

[C]
P5 (b,c) Full or Isothermal Anneal  
  Normalize and Temper ***** 1250 [675]
  Subcritical Anneal (P5c   only) ***** 1325 - 1375 [715 - 745]
P9 Full or Isothermal Anneal  
  Normalize and Temper ***** 1250 [675]
P11 Full or Isothermal Anneal  
  Normalize and Temper ***** 1200 [650]
P22 Full or Isothermal Anneal  
  Normalize and Temper ***** 1250 [675]
P91 Normalize and Temper 1900-1975 [1040 - 1080] 1350-1470 [730 - 800]
  Quench and Temper 1900-1975 [1040 - 1080] 1350-1470 [730 - 800]

Type of ASTM A335 P12 High Pressure Steel Pipe

Inconel 625 Square Pipe
  • Square Pipe
  • Inconel 625 Round Pipe
  • Round Pipe
  •  Inconel 625 Rectangular Pipe
  • Rectangular Pipe

  • Inconel 625 Square Pipe
  • Square Pipe
  • Inconel 625 Round Pipe
  • Round Pipe
  •  Inconel 625 Rectangular Pipe
  • Rectangular Pipe
  • Tensile Requirements of ASTM A 335 GR P12

      Seamless  
    P-5 P-9 P-11 P-22 P-91 P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
    Tensile   Strength, min.,   psi
    ksi 60 60 60 60 85
    MPa 415 415 415 415 585  
    Yield Strength,   min., psi  
    ksi 30 30 30 30 60  
    MPa 205 205 205 205 415  

    Permissible Variation in Wall Thickness of ASTM A 335 GR P12

    NPS [DN] Designator Tolerance, % from Specified
    Over Under
    1/8 to 2 1/2 [6 to 65] incl., all t/D ratios 20.0% 12.5%
    Above 2 1/2  [65], t/D < or = 5% 22.5% 12.5%
    Above 2 1/2  [65], t/D > 5% 15.0% 12.5%
    (t = Specified Wall Thickness; D = Specified Outside   Diameter)

    ASTM A335 / SA335 Alloy Steel P12 Seamless Pipes other Available Types

    Alloy Steel P12 Pipes Alloy Steel P12 Seamless Pipe
    ASTM A335 Alloy Steel P12 Pipes Chrome Moly Grade P12 Seamless Pipes
    ASTM A691 Alloy Steel EFW Pipes ASME SA335 Chrome Moly P12 Pipes
    Grade P12 Chrome Moly Seamless Pipes Alloy Steel P12 Seamless Pipes Supplier
    AS Grade P12 Seamless Pipe ASTM A691 Alloy Steel Pipes
    Alloy Steel UNS K11562 Pipes Alloy Steel Gr. P12 High Pressure Steel Pipe
    ASTM A335 Grade P12 Pipe AS P12 Seamless Pipes Stockiest
    Chrome Moly P12 Pipe Exporter ASME SA335 Alloy Steel P12 Pipe Dealer

    Neminox Steel & Engineering Co. offers the wide range of Industrial metal and steel products like pipes, tubes, sheets, plates, rods, bars, weld, flanges, forges & pipe fittings in various materials. Since two decades, we have led as a reliable exporter, supplier, trader and stockist of industrial steels in the world-wide market. We can also provide custom required as per your cut & full length, sizes, hardness and grades at the most competitive prices. Neminox Steel & Engineering Co. is ISO 9001:2015 approved manufacturer in India. We export the standard quality with swift delivery services to countries like USA, Indonesia, Thailand, Mexico, Vietnam, Philippines, Malaysia, Algeria, UK, UAE, Saudi Arabia, Africa, European and Middle East Countries. Just contact us or put your requirement in our Enquiry Form, will get back to you quickly.

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