Source AISI 4340 / SAE 4340 Tube to specification
Build a supplier-comparable enquiry by defining OD, wall thickness, tolerance, seamless or welded route, finish, length, heat treatment and testing, material designation, governing standard and edition, quantity, destination, acceptance criteria and required certification.
RFQ definition: OD, wall thickness, tolerance, seamless or welded route, finish, length, heat treatment and testing.
Typical family applications: oil and gas, pressure equipment, automotive, machinery, shafts, gears, structural and general engineering applications. Suitability remains the buyer's engineering decision.
AISI 4340 / SAE 4340 Tube sizes and dimensions to specify
Useful enquiry selectors—not an inventory or universal availability claim. Exact manufacturability is confirmed against grade, standard, route, tolerance and quantity.
Tube dimensions must be tied to the governing product standard, tolerance class, service and manufacturing route.
Range guide: Common enquiry OD examples include 1/4 to 2 inch and 6 to 50 mm; larger or special sections are capability-led.
| Wall thickness | State nominal wall and tolerance; do not rely on OD alone |
|---|---|
| Form | Round / square / rectangular / capillary where applicable |
| Condition | Annealed / pickled / bright / polished / heat-treated as required |
Common AISI 4340 / SAE 4340 Tube size and RFQ examples
Use these as enquiry-format references only. They are not a stock list, dimensional standard substitute or availability promise.
| Fractional size | Exact OD | Common wall examples | Supply form | Example RFQ line |
|---|---|---|---|---|
| 1/4 inch | 6.35 mm OD | 0.89 / 1.24 mm | straight / coil | AISI 4340 / SAE 4340 Tube — 1/4 inch / 6.35 mm OD / 0.89 / 1.24 mm / straight / coil |
| 3/8 inch | 9.53 mm OD | 0.89 / 1.24 mm | straight / coil | AISI 4340 / SAE 4340 Tube — 3/8 inch / 9.53 mm OD / 0.89 / 1.24 mm / straight / coil |
| 1/2 inch | 12.70 mm OD | 0.89 / 1.24 / 1.65 mm | straight / coil | AISI 4340 / SAE 4340 Tube — 1/2 inch / 12.70 mm OD / 0.89 / 1.24 / 1.65 mm / straight / coil |
| 5/8 inch | 15.88 mm OD | 1.24 / 1.65 mm | straight | AISI 4340 / SAE 4340 Tube — 5/8 inch / 15.88 mm OD / 1.24 / 1.65 mm / straight |
| 3/4 inch | 19.05 mm OD | 1.24 / 1.65 / 2.11 mm | straight / coil | AISI 4340 / SAE 4340 Tube — 3/4 inch / 19.05 mm OD / 1.24 / 1.65 / 2.11 mm / straight / coil |
| 1 inch | 25.40 mm OD | 1.65 / 2.11 mm | straight / coil | AISI 4340 / SAE 4340 Tube — 1 inch / 25.40 mm OD / 1.65 / 2.11 mm / straight / coil |
| 1 1/2 inch | 38.10 mm OD | 1.65 / 2.11 mm | straight | AISI 4340 / SAE 4340 Tube — 1 1/2 inch / 38.10 mm OD / 1.65 / 2.11 mm / straight |
| 2 inch | 50.80 mm OD | 1.65 / 2.11 mm | straight | AISI 4340 / SAE 4340 Tube — 2 inch / 50.80 mm OD / 1.65 / 2.11 mm / straight |
How we compare AISI 4340 / SAE 4340 Tube manufacturers
Grade designation, heat traceability and required certification are matched to the RFQ.
Route, size range, tolerances, heat treatment and form-specific capability are checked.
Dimensional, visual, PMI / chemistry, mechanical or NDT controls are defined where applicable.
MTC, inspection records, packing and export documents are aligned before dispatch.
No material grade, route, standard or dimension substitution without written buyer approval.
Supplier offers are compared on the same technical basis before commercial selection.
AISI 4340 / SAE 4340 Tube sourcing questions
How do I source AISI 4340 / SAE 4340 Tube from India?
Send the exact material designation, product standard, OD, wall thickness, tolerance, seamless or welded route, finish, length, heat treatment and testing, quantity, destination and required inspection. India Supply Solutions then identifies and compares suitable Indian manufacturers or suppliers.
How do I compare the qualified AISI 4340 / SAE 4340 Tube manufacturers in India?
Compare actual capability for the named grade and form, applicable standard, traceability, test documentation, delivery record, inspection readiness and commercial transparency—not only the lowest quoted price.
Can you quote AISI 4340 / SAE 4340 Tube price in India?
Yes, after grade, standard, dimensions, quantity, packing and delivery basis are defined. We do not publish a fabricated fixed price for specification-sensitive metal products.
What documents should be requested for AISI 4340 / SAE 4340 Tube?
Depending on the requirement, buyers may request MTC / heat traceability, inspection records, PMI or chemistry verification, mechanical tests, NDT and packing / export documents.

