Large Diameter Bearing Seamless Alloy Steel Round Tube ASTM A213 T9 Tubes

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Seamless Cold Rolling ASTM/ASME A/SA 213 T9 Alloy Steel Tubes For Hydropower Plant




1. Main Standard

    ASTM/ASME A/SA 213


2. Material Grade:

Grade and Chemical Composition ()
Grade C Mn P≤ S≤ Si Cr Mo
T5 0.05-0.15 0.30-0.60 0.025 0.025 0.50-1.00 0.50-1.00 1.00-1.50
T11 0.05-0.15 0.30-0.60 0.025 0.025 0.50-1.00 0.50-1.00 1.00-1.50
T12 0.05-0.15 0.30-0.61 0.025 0.025 ≤0.50 0.80-1.25 0.44-0.65
T22 0.05-0.15 0.30-0.60 0.025 0.025 ≤0.50 1.90-2.60 0.87-1.13
Mechanical Properties(MPa):
Grade Tensile Point Yield Point Elongation    
T5 ≥415 ≥205 ≥30%    
T11 ≥415 ≥205 ≥30%    
T12 ≥415 ≥220 ≥30%    
T22 ≥415 ≥205 ≥31%    





1. Type

   Cold Rolling

2. Technology

    Cold Rolling

3. Size

   8~114.3 mm

4. Delivery Condition

    Bright Annealed

5. Surface Treatment

    Cold Rolling




Petrochemical Industry Screw drill, Drilling steel, Marine drilling platform, Production platform, etc.
Power Industry Hydropower plant, Thermal power plant, nuclear power plant, etc.
Machinery Manufacturing Automobile manufacturing, shipbuilding, Aerospace manufacturing, Fasteners, Bolts, Nuts, Automobile parts
Automobile manufacturing Axles, Instruments, Electronic parts and components, , Sensors, Turbocharger system, exhaust system, Fasteners, Bolts, Nuts, Pumps, Valves, Tubes, Pipes, etc.
Others Military industry, Environment protection, etc.



1. Scale of company

    Suzhou Double Gold Industry Co., Ltd. covers a area of 50000,building 29000,with a total investment of RMB 150 million CNY.

2. Production facilities

    We fit out a set of advanced steel production facility, such as AIM,EAF,AOD,LF, VOD, ESR, IESR, VIM and the processing equipment contains heat treatment furnace, peeling machine, roller straightening machine, cold drawing machine, coreless grinder etc.

3. Testing equipments

    We fit out advanced testing equipments which include German SPECTRO direct-reading spectrometer, hardness and tensile machine, impact testing device, automatic & manual ultrasonic nondestructive detector, corrosion testing machine, metallurgical microscope etc.

4. Main customers

    Our main customers are GE, Dana, Panasonic, Bentler, Atlas Copco, Faurecia, CNPC, Sinopec, CNNC, CGN, CSIC etc.

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Mr. Mr. Wang
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Suzhou double gold industry Co.,Ltd
No.478, Songshan Road,undefined, Suzhou, Jiangsu, China (Mainland)
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