ASTM A333 Grade 3 Seamless Boiler Steel Tube

Group Boiler Tubes
Min. Order 3 ton
Terms of Payment L/C, T/T
Update Time 2020-04-03
Item specifics
Heat Treatment RequirementsNormalizing or Quenched and Tempered
Surface treatmentOil-dip, Varnish, Passivation, Phosphating, Shot Blasting

Quality Standard:

ASTM A333 Standard Specification for Seamless and Welded Steel Pipe for Low Temperature Service

Chemical Copmosition(%):







Grade 3

0.19 max



0.025 max

0.025 max

 Size Range

1.Outer Dimensions: 19.05mm-457mm

2.Wall Thickness:2.0mm-60mm

3.Lengths: Lengths required shall be specified on order.If no definite lengths required, following practice applies:

Single Random — 17′ ~ 24′ lengths

Double Random — 36′ ~ 44′ lengths

Heat Treatment Requirements: 

All seamless and welded pipe shall be treated to control their microstructure by the following methods:

1.Normalizing per ASTM A333 Standard Specification for Seamless and Welded Steel Pipe for Low Temperature Service section; section or section

2.Quenched and Tempered per A 333/A 333M – 05 section

3.Double Normalized and Tempered per A 333/A 333M – 05 section


Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

1.For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot.

2.For small lots, at least one pipe shall be tested.

3.For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.

4.Hydrostatic Test

5. Impact Test One notched bar impact test, consisting of breaking three specimens shall be made from each heat represtented in a heat-treatment load on specimens taken from the finished pipe.


Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.

Required Markings on Each Length (On Tags attached to each Bundle in case of Bundled Pipe):

Markings will adhere to prescribed specifications in A 999/A999M and be: Rolled, Stamped, or Stenciled (Mfrs. Option)


PackingBare packing bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.



Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.

Weight of bundle – up to 5000 kg upon request of customer.