Grade 2 Titanium Seamless Tube | ASTM B338 Heat Exchanger Tube

Specification detail with sources

ASTM B338 is the acceptance basis for Grade 2 (UNS R50400) seamless tube in condensers and heat exchangers, and four certificate lines decide whether a heat passes: minimum tensile strength of 345 MPa, a yield window of 275 to 450 MPa, oxygen capped at 0.25 percent and iron at 0.30 percent. B338 also defines the flattening and flare tests that matter for tube ends going into a rolled joint, so a bundle specification should name them explicitly rather than assume they travel with the standard number.

Beiyu Titanium supplies Grade 2 seamless tube from 5 to 325 mm outside diameter with walls from 0.5 to 12 mm and lengths to 12,000 mm, annealed with a bright or pickled surface. For an exchanger order Beiyu works from OD, wall, cut length and quantity per length, plus the tube sheet expansion detail, and confirms the EN 10204 3.1 certificate scope with heat numbers at quotation so the test report matches the acceptance lines above.

Specification for Grade 2 commercially pure titanium seamless tube

These are the fields an order line needs. The mechanical requirement that applies is the one in ASTM B338 for the ordered form, size range and condition, so it is confirmed against the ordered standard at quotation rather than carried across from another product standard.

Dimensions

State outside diameter, wall thickness and length, and say whether the item is ordered as tube or as pipe, because that is what fixes the governing standard and with it the acceptance requirements.

Inspection and documentation

The inspection scope is set by the order rather than assumed. State which examinations are required, to which acceptance standard and class, and at which stage they are performed, because those four fields are what make an inspection line objectively verifiable during receiving inspection.

Acceptance criteria you can paste into your purchase order

Grade and standard: Grade 2 commercially pure titanium, ASTM B338, UNS R50400
Form and dimensions: ______
Tolerance: ______
Condition: ______ (R / M / Y, stated on the order)
Surface: ______ (state a roughness value where it is an acceptance criterion)
Straightness and ovality: ______
Inspection scope: ______ (examination, acceptance standard, class and stage)
Certificate: EN 10204 3.1 inspection certificate, chemistry traceable to heat number, mechanical results and inspection lot identification per the governing specification

Send the drawing or purchase specification with those fields filled in and the enquiry is reviewed against the applicable standard before pricing.