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Home> Products> Steel Fitting> Alloy Steel Fitting> A234 WP11 Class 2 Alloy Fittings B16.9

A234 WP11 Class 2 Alloy Fittings B16.9

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    Product Attributes Supply Ability & Additional Information
    Product Attributes

    Model No.Alloy Steel Fitting

    BrandYUHONG

    MaterialAlloy

    ConnectionWelding

    Product Description

    ASTM A234 WP11 Class 2 Alloy Fittings // 90DEG/45DEG ELBOW, EQUAL TEE, TEE REDUCER, CONC.REDUCER, ECC.REDUCER, CAP ETC.. ASME B16.9 

    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.

    Packaging & Delivery
    Package Type : Plywood Case Packing
    Supply Ability & Additional Information

    PackagingPlywood Case Packing

    TransportationOcean,Land,Air

    Place of OriginCHINA

    CertificateABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

    Payment TypeL/C,T/T,Western Union

    IncotermFOB,CFR,CIF

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    YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2015, ISO 14001, ISO 18001, API 5L , API 5CT , API 6D, And our branch company Zhejiang Yuhongwell Steel Co.Ltd has expanded its field of activities and entered in trade and supply of tubular & flat products in Duxplex and Super Duplex, Stainless Steel, Nickel Base alloy Steel ,Cr-Mo alloy steel , Copper Nickel alloy steel,Carbon Steel for our reputed clients worldwide. These products are widely used in various important sectors like Mining, Energy, Boiler & Heat Exchanger, Petrochemical, Chemical Industry, Food plant, Paper plant, Gas and Fluid Industry etc. YUHONG HOLDING GROUP has gained rich experience in Pipes, Fittings, Flanges, Valves, Structural steel, Coils and Plates in past eight years. In a short span of time, YUHONG brand has marked its global presence in more than 40 countries, like, Korea, USA, Canada, Mexico, Colombia, Bolivia, Chile, Argentina, Brazil, Ecuador, Austria, New Zealand,...
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