Jiangyin Donghao Stainless Steel Tubing  
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Cold Drawn Bright Annealing Precision Stainless Steel Tubing

We have 10 sets of Cold Drawn Mills include 2 sets of Precision Cold Drawn Mills with Korea import Lubricant. The Lubricant import from Korea can ensure the Roughness of stainless steel tubing surface, and degreasing working all by manual to ensure the brightness of the tubes. Final solution annealing finished with Bright Annealing, unnecessary with Pickling. So it will friendly with the Enviorment

We have 4 Sets of Precision Cold Rolled Machines using highly polished rollers in touch with the stainless steel surface to ensure the smoothness and brightness. Selected the best quality stainless steel round bar, clean and smooth on outside surface and inside surface. Withstand high pressure,no deformation after cold bending, no crack and break after flattening and flaring etc.

Mainly Application:

Textile Industries
Precision instruments and parts
Medical eauipment apparatus
Electronic and electric appliance
Automatic apparatus
Opto-electrical and semi-conductor


United States: ASTM A213 / A269 / A632
Europe: DIN 17458 / ISO 1127

Main Testing Terms and Procedure:

  • 1. Heat Treatment and Solution Annealing / Bright Annealing
  • 2. Cutting to required length and deburring;
  • 3. Chemical Composition Analysis Test With 100% PMI and One tube from each heat by Direct Reading Spectrometer
  • 4. Visual Test and Endoscope Test for Surface Quality Test
  • 5. 100% Hydrostatic Test and 100% Eddy Current Test
  • 6. Ultrasonic Test subject to the MPS (Material Purchase Specification)
  • 7. Mechanical Tests includes Tension Test, Flattening Test, Flaring Test, Hardness Test
  • 8. Impact Test subject to Standard request
  • 9. Grain Size Test and Intergranular Corrosion Test
  • 10. Ultrasoic measuring of Wall Thickness

  • Marking & Packing

  • Marking according to MPS and Standard
  • Stainless Steel Tubes Ends with Caps according to PO
  • In Seaworthy Wooden Cases With Plastic Paper protect
  • In Plywood Cases With Plastic Paper Protect(Recommend, All Plywood Cases made by ourselves with lower cost.)
  • Steel Racks Package
  • Hexagonal packing in Bundles

  • Quality Control

  • Third Part Inspection Accepted according to EN 10204 3.2
  • ISO 9001 - 2008 issued by Lloyd's,
  • PED 97/23/EC By Lloyd's,
  • ASME Boiler and Pressure Vessel Code Certificated Certificate Issued by TUV

  • Grade(UNS): Austenitic Stainless Steel:
    304/304L/304H(1.4301/1.4306/1.4948); 316/316L(1.4401/1.4404); 316Ti(1.4571); 321(1.4541); 309S (1.4833); 310S(1.4845); 317L(1.4438)321H(1.4878); 347H (1.4550);

    Duplex Stainless Steel:
    S32001, S32003, S31500, 2205(1.4462); S32304,(1.4362);S31803,2507 (S32750), S32760(1.4501);S32101(1.4162);

    Super Austenitic Stainless Steel: 904L, S30432, S31042, 6Mo (S31254, N08367)

    Nickel Base Alloys:
    Alloy 20 (UNS N08020), Monel 200 (UNS 02200), Monel 400 (UNS N04400), Incoloy 800 (UNS N08800), Incoloy 800H (UNS N08810), Incoloy 800HT (UNS N08811), Incoloy 825 (UNS N08825), Inconel 600 (UNS N06600), 4J29, 4J36, GH3030, GH3039, C276 (UNS N10276)

    Martensitic Stainless Steel:410(1.4006), 410S(1.4000), 420(1.4021)

    Ferritic Stainless Steel:405(1.4002), 430(1.4016)

    Outside Diameter: 6 - 89mm
    Wall Thickness: 0.50 - 12mm
    Standards(Norm): EN 10216-5; DIN 17456, DIN 17458, DIN 2462, DIN 17455
    GB/T14975; T14976; T13296; GB5310;
    ASTM A213, A269, A312, A511, A789, A790, A928, A999, A1016, ASTM B161, ASTM B163, ASTM B165, ASTM B167, ASTM B338, ASTM B407, ASTM B423, ASTM B444,ASTM B619, ASTM B622, ASTM B626, ASTM B668, ASTM B677, ASTM B829
    JIS G3459, JIS G3463, JIS G3446, JIS G3447, JIS G3448, JIS G3468
    GOST 9940;GOST 9941;
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