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A234 WP11 Class 2 Alloy Fittings B16.9

  • A234 WP11 Class 2 Alloy Fittings B16.9
  • A234 WP11 Class 2 Alloy Fittings B16.9
  • A234 WP11 Class 2 Alloy Fittings B16.9
  • A234 WP11 Class 2 Alloy Fittings B16.9

A234 WP11 Class 2 Alloy Fittings B16.9

    Payment Type: L/C,T/T,Western Union
    Terms of Trade: FOB,CFR,CIF
    Delivery Time: 20 Days
    Packaging: Plywood Case Packing
    Brand: YUHONG
    Transportation: Ocean,Land,Air
    Place of Origin: CHINA
    Certificate: ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Basic Info

Model No.: Alloy Steel Fitting

Product Description


YUHONG GROUP, is specialized in manufacturing of above Cr-Mo Alloy steel pipe fittings in China.

The Cr-Mo alloy steel pipe fittings manufactured to ASTM A234 includes the grades of WP1, WP12 CL1, WP12 CL2, WP11 CL1, WP11 CL2, WP11 CL3, WP22 CL1, WP22 CL3, WP24, WP5 CL1, WP5 CL3, WP9 CL1, WP9 CL3, WP91, WP911, WP92. They can be widely used in moderate or high-temperature service. The most common product form of ASTM A234 is butt welding pipe fittings manufactured to ASME B16.9. The BW pipe fittings can be made from either seamless pipes, or fusion-welded pipes which shall be with filler metal added and shall conform to the chemical requirements of the standard specification.

180° bends S/R, 6″ SCH40, BW, ASTM A234 WP5, ASME B16.9.

1. Chemical Composition Requirements

Chemical Composition of ASTM A234 Alloy Steel Pipe Fittings(%)
Grade C Mn P S Si Cr Mo Others
WP1 0.28 0.30-0.90 0.045 0.045 0.10-0.50 - 0.44-0.65 -
WP12 CL1, WP12 CL2 0.05-0.20 0.30-0.80 0.045 0.045 0.60 0.80-1.25 0.44-0.65 -
WP11 CL1 0.05-0.15 0.30-0.60 0.030 0.030 0.50-1.00 1.00-1.50 0.44-0.65 -
WP11 CL2, WP11 CL3 0.05-0.20 0.30-0.80 0.040 0.040 0.50-1.00 1.00-1.50 0.44-0.65 -
WP22 CL1, WP22 CL3 0.05-0.15 0.30-0.60 0.040 0.040 0.50 1.90-2.60 0.87-1.13 -
WP24 0.05-0.10 0.30-0.70 0.020 0.010 0.15-0.45 2.20-2.60 0.90-1.10 *A
WP5 CL1, WP5 CL3 0.15 0.30-0.60 0.040 0.030 0.50 4.0-6.0 0.44-0.65 -
WP9 CL1, WP9 CL3 0.15 0.30-0.60 0.030 0.030 1.00 8.0-10.0 0.90-1.10 -
WPR 0.20 0.40-1.06 0.045 0.050 - - - *B
WP91 0.08-0.12 0.30-0.60 0.020 0.010 0.20-0.50 0.85-1.05 0.85-1.05 *C
WP911 0.09-0.13 0.30-0.60 0.020 0.010 0.10-0.50 0.90-1.10 0.90-1.10 *D
WP92 0.07-0.13 0.30-0.60 0.020 0.010 0.50 0.30-0.60 0.30-0.60 *E

*All values listed are maximum unless a range is provided or otherwise specified.
*A – Cu:0.75-1.25,Al:≤0.020,B:0.0015-0.0070,N:≤0.12,Ti:0.06-0.10,V:0.20-0.30. *B – Ni:1.60-2.24,Cu:0.75-1.25.
*C – Ni:≤0.40,V:0.18-0.25,Co:0.06-0.10,N:0.03-0.07,Al:≤0.02,Ti:≤0.01,Zr:≤0.01.
*D – Ni:≤0.40,V:0.18-0.25,Co:0.06-0.10,N:0.04-0.09,Al:≤0.02,B:0.003-0.006,W:0.90-1.10,Ti:≤0.01,Zr:≤0.01.
*E – Ni:≤0.40,Al:≤0.02,B:0.001-0.006,Co:0.04-0.09,N:0.03-0.07,Ti:≤0.01,W:1.50-2.00,V:0.15-0.25,Zr:≤0.01.
*The unit [%" shall be applied to the chemical composition values from *A to *E.

2. Mechanical Properties

Mechanical Properties of ASTM A234 Alloy Steel Pipe Fittings
Grade Tensile Strength, min. ksi[MPa] Yield Strength, min. ksi[MPa] Elongation, min. %
Longitudinal Transverse
WP1 55-80[380-550] 30[205] 20 13
WP12 CL1 60[415] 32[220] 22 14
WP12 CL2 70[485] 40[275] 22 14
WP11 CL1 60[415] 30[205] 22 14
WP11 CL2 70[485] 40[275] 22 14
WP11 CL3 75[520] 45[310] 22 14
WP22 CL1 60[415] 30[205] 22 14
WP22 CL3 75[520] 45[310] 22 14
WP24 85[585] 60[415] 20 -
WP5 CL1 60[415] 30[205] 22 14
WP5 CL3 75[520] 45[310] 22 14
WP9 CL1 60[415] 30[205] 22 14
WP9 CL3 75[520] 45[310] 22 14
WPR 63-99[435-605] 46[315] 20 -
WP91 90[620] 60[415] 20 13
WP911 90-120[620-840] 64[440] 20 13
WP92 90-120[620-840] 64[440] 20 13

3. Heat Treatment

Pipe fittings of ASTM A234 alloy steel, after forming at an elevated temperature, shall be cooled to a temperature. below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air.

  1. Fittings of Grades WP1, WP11 Class 1, WP11 Class 2, WP11 Class 3, WP12 Class 1, WP12 Class 2, WP22 Class 1, WP22 Class 3, WP5, and WP9 shall be furnished in the full-annealed, isothermal-annealed, or normalized and tempered condition. If normalized and tempered, the tempering temperature for WP11 Class 1, WP11 Class 2, WP11 Class 3, WP12 Class 1, and WP12 Class 2 shall not be less than 1150 °F [620 °C]; for Grades WP5, WP9, WP22 Class 1, and WP22 Class 3 the tempering temperature shall not be less than 1250 °F [675 °C].
  2. Fittings of Grades WP1, WP12 Class 1, or WP12 Class 2 either hot formed or cold formed may be given a final heat treatment at 1200 °F [650 °C].
  3. Fittings of WP24 either hot formed or cold formed shall be furnished in the normalized and tempered condition. The normalizing temperature range shall be 1800 to 1975 °F [980 to 1080 °C]. The tempering temperature range shall be 1350 to 1470 °F [730 to 800 °C].
  4. Fittings in all thicknesses produced by fusion welding after the heat treatment specified in 1 shall be post-weld heat treated at a temperature not less than prescribed above for tempering except that Grade WP1 is required to be post-weld heat treated only when the nominal wall thickness at the welded joint is 1⁄2 in. [13 mm] or greater, and except that preheat and post weld heat treatment are not required for WP24 fittings whose section thickness does not exceed 0.500 in. [12.7 mm].
  5. Grade WP91 shall be normalized at 1900 °F [1040 °C] minimum, and 1975 °F [1080 °C] maximum, and tempered in the temperature range of 1350 °F [730 °C] to 1470 °F [800 °C] as a final heat treatment.
  6. Grade WP911 shall be normalized in the temperature range of 1900 to 1975 °F [1040 to 1080 °C], and tempered in the temperature range of 1365 to 1435 °F [740 to 780 °C] as a final heat treatment.
  7. Grade WP92 shall be normalized at 1900 °F [1040 °C] minimum, and 1975 °F [1080 °C] maximum, and tempered in the temperature range of 1350 °F [730 °C] to 1470 °F [800 °C] as a final heat treatment.

4. Inspection and Test

SGS TPI A234 WP11 Alloy Fittings

ASTM A234 Cr-Mo alloy steel grade P91: 90° Elbow L/R 16″x72mm.

Except for dimensional inspection and visual examination, the inspection & tests that shall be selectively performed on ASTM A234 alloy steel pipe fittings include: hydrostatic test, liquid penetration test, magnetic particle examination, ultrasonic test, nondestructive electromagnetic(eddy current) test.



Yuhong Group Co.,Limited is one of the largest Procurement Engineering and Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004. Yuhong Group has expanded its field of activities and entered in trade and supply of tubular & flat products in Stainless Steel, Carnon steel, Alloy Steel as well as a series of special materials for our reputed clients worldwide. These products are widely used in various important sectors like Mining, Energy, Petrochemical, Chemical Industry, Food Plant, Paper Plant, Gas and Fluid Industry etc.

Yuhong Group has gained rich experience in Pipes, Fittings, Flanges, Valves, Structural steel, Coils and Plates in past seven years. In a short span of time, Yuhong Group has marked its global presence in more than 30 countries. We have successfully implemented the orders of Cross Country Pipelines for our valuable customers. In addition, we have also developed a huge network of contacts and strategic alliances with most important manufacturers an stockists around the world.

It allows us to offer highly competitive solutions with certified quality, complying with high standard of today's industry. In the supply chain of Yuhong Group,Stainless Steel Pipe and Tube, which are produces by our factories : Zhejiang Yuhongwell Steel Co.,Ltd , Zhejiang Zhongwu Tube Manufacturing Co.,Ltd , Jiangsu New Zhongzhou Special Alloy Materials Co.,Ltd etc. And all of other products' suppliers are approved by our QC department. About Stainless Steel Fittings & Flanges, our suppliers are approved by PED, AD2000, DNV, ABS, TS, GL, LR, KR, GOST, NK, etc. Similarly in Carbon steel pipe/tube/fitting, our suppliers are approved by API5L, API 5CT,API 5D, PED etc. When we place the order, it is our practice to follow the order start from raw material. After getting the material ready, our QC people make strict inspection again before loading the material. We will follow the whole processing of producing, marking ,packing and inspection before deliver to customer.

Company Info

  • Representative: Bing Chen
  • Product/Service: Heat Exchange Tube , Boiler Tube , Nickel Alloy Steel Pipe & Tube , Duplex Steel Pipe & Tube , Forged Flange , Butt Welding Fitting
  • Capital (Million US $): 200,000,000RMB
  • Year Established: 2007
  • Total Annual Sales Volume (Million US $): US$10 Million - US$50 Million
  • Export Percentage: 61% - 70%
  • Total Annual Purchase Volume (Million US $): US$1 Million - US$2.5 Million
  • No. of Production Lines: 54
  • No. of R&D Staff: 11 -20 People
  • No. of QC Staff: 5 -10 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): 30,000-50,000 square meters
  • Factory Location: MoCheng Industrial Park, Aojiang Town, Wenzhou City, Zhejiang.
  • Contact Person: Mr. Luis Bao
  • Tel: 86-574-88013900
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