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ASTM A335 Alloy Steel Pipe 42CRMO

Short Description:

Name: Alloy Steel Pipe

Standard: ASTM, ASME and API

Size: 1/8″NB TO 30″ NB IN

Tubing Size: 1 / 2″ OD up to 5″ OD, customs diameters also available

Outer Diameter: 6-2500mm; WT:1-200mm

Schedule: SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS

Grade: STM A335 Gr. P5, P9, P11, P12, P21, P22 & P91, ASTM A213 – T5, T9, T11, T12, T22, T91, ASTM A691


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Overview of alloy steel pipe

An Alloy Steel Pipe is used in applications which require moderate corrosion resistance properties with good durability and at an economical cost. To simply put it, alloy pipes are preferred in those areas where carbon steel pipes may fail. There are two classes of alloy steels - high alloys and low alloy steels. Pipes that constitute low alloy steels have an alloying content that ranges below 5%. Whereas the alloying content of a high alloy steel would range between 5% to about 50%. Similar to most alloys the working pressure ability of an Alloy Steel Seamless Pipe is about 20% higher than a welded pipe. So in applications that have a higher working pressure as a prerequisite, the use of a seamless pipe is justified. Though stronger than a welded pipe, the cost is much higher. Furthermore, the risk of intergranular corrosion at the heat affected weld zone is more in a welded product. The visible difference between an Alloy Steel Welded Pipe and a seamless product is the latitudinal seam along the length of the pipe. However, today, with the advancement in technology, the seam present on the Alloy Steel ERW Pipe could considerably be reduced via means of a surface treatment, such that it remains invisible to human eyes.

Alloy Steel Tube & Pipe Specification (Seamless/ Welded/ ERW)

Specifications ASTM A 335 ASME SA 335
Standard ASTM, ASME and API
Size 1/8" NB TO 30" NB IN
Tubing Size 1 / 2" OD up to 5" OD, customs diameters also available
Outer Diameter 6-2500mm; WT:1-200mm
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Grade STM A335 Gr. P5, P9, P11, P12, P21, P22 & P91, ASTM A213 – T5, T9, T11, T12, T22, T91, ASTM A691
Length Within 13500mm
Type Seamless / Fabricated
Form Round, Hydraulic Etc
Length Single Random, Double Random & Cut Length.
End Plain End, Beveled End, Treaded

Types Of Alloy Steel Seamless Tubes

15cr mo alloy solid steel pipes
25crmo4 alloy steel pipe
36 inch ASTM A 335 Grade P11 alloy galvanized steel pipe
42CrMo/ SCM440 alloy steel seamless pipe
Alloy 20/21/33 steel pipe
40MM alloy steel pipe
ASTM A355 P22 Seamless Alloy Steel Pipe
ASTM A423 Alloy Steel Seamless Pipe
Galvanized low alloy coated steel pipe

Alloy Steel ERW Pipes Chemical Properties

Alloy Steel
C Cr Mn Mo P S Si
  0.05 – 0.15 1.00 – 1.50 0.30 – 0.60 0.44 – 0.65 0.025 max 0.025 max 0.50 – 1.00

Mechanical Characteristics Alloy Steel Chrome moly Pipes

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

Outside Diameter & Tolerance of ASME SA335 Alloy Pipe

ASTM A450 Hot rolled Outside Diameter, mm Tolerance, mm
OD≤101.6 +0.4/-0.8
101.6<OD≤190.5 +0.4/-1.2
190.5<OD≤228.6 +0.4/-1.6
Cold Drawn Outside Diameter, mm Tolerance, mm
OD<25.4 ±0.10
25.4≤OD≤38.1 ±0.15
38.1<OD<50.8 ±0.20
50.8≤OD<63.5 ±0.25
63.5≤OD<76.2 ±0.30
76.2≤OD≤101.6 ±0.38
101.6<OD≤190.5 +0.38/-0.64
190.5<OD≤228.6 +0.38/-1.14
ASTM A530 & ASTM A335 NPS Outside Diameter, inch Tolerance, mm
1/8≤OD≤1-1/2 ±0.40
1-1/2<OD≤4 ±0.79
4<OD≤8 +1.59/-0.79
8<OD≤12 +2.38/-0.79
OD>12 ±1%

Alloy Steel Grade Pipes Heat Treatment

  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]

Alloy Steel Seamless Tubes Application Industries

● Off-Shore Oil Drilling Companies
● Power Generation
● Petrochemicals
● Gas Processing
● Specialty Chemicals
● Pharmaceuticals
● Pharmaceutical Equipment
● Chemical Equipment
● Sea Water Equipment
● Heat Exchangers
● Condensers
● Pulp and Paper Industry

Detail drawing

alloy-steel-seamless-pipe factory price (7)

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