ASTM A333 Gr 6 Pipe & TubeSA-333 Gr 6 · Manufacturer, stockist & exporter, India
Also sold as SA-333 Gr 6 · Low-temperature carbon steel pipe · LTCS
ASTM A333 Gr 6 pipe is supplied seamless to ASTM A333 Gr 6 and welded to ASTM A333 Gr 6, in ASME pipe sizes and schedules, with tube to ASTM A333 Gr 6. It is a low-temperature carbon steel pipe, impact-tested to −45 °C, chosen for cold-climate and refrigerated piping down to −45 °C. Kanak Steel & Engineering Co. supplies it with EN 10204 3.1 mill certificates from Mumbai to buyers across India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- Stock & mill supply
- EN 10204 3.1 / 3.2
- Mill test certificates
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASTM A333 Gr 6 Pipe & Tube?
ASTM A333 Gr 6 pipe & tube is a low-temperature carbon steel pipe, impact-tested to −45 °C supplied as pipe & tube to ASTM A333 Gr 6. Buyers specify it for cold-climate and refrigerated piping down to −45 °C. It is also sold as SA-333 Gr 6, Low-temperature carbon steel pipe, LTCS.
- What it is
- Low-temperature carbon steel pipe, impact-tested to −45 °C
- Seamless
- ASTM A333 Gr 6
- Welded
- ASTM A333 Gr 6
- Sizes
- NPS ⅛" – 24" · OD tube to order
- Schedules
- 5S · 10S · 40S · 80S · 160 · XXS
- Best at
- Cold-climate and refrigerated piping down to −45 °C
ASTM A333 Gr 6 Pipe & Tube Specification & Sizes
| Seamless pipe | ASTM A333 Gr 6 |
|---|---|
| Welded pipe | ASTM A333 Gr 6 |
| Tube | — |
| Grade | ASTM A333 Gr 6 |
| Size & schedule | NPS ⅛" to 24" to ASME B36.19 / B36.10; OD × wall for tube |
| Length | Single random, double random, or cut lengths |
| Ends | Plain end · bevelled end (for welding) · threaded |
| Testing | Hydrostatic · NDT · chemical & mechanical per heat · impact tests where specified |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
ASTM A333 Gr 6 Pipe: Seamless, Welded or Tube?
Three different specifications cover A333 Gr 6 tubular products. Pick the route first — it decides price, test requirements and lead time. General requirements (tolerances, hydrostatic or electric testing) come from ASTM A530. Schedules, the −12.5% wall tolerance and the B31.3 wall formula are explained in the pipe guide.
| Route | Specification | Use it for |
|---|---|---|
| Seamless pipe | ASTM A333 Gr 6 | Pressure and critical service; no weld seam to inspect. |
| Welded pipe | ASTM A333 Gr 6 | Economical in larger diameters and thinner walls where the code allows it. |
| Tube | — | Heat exchangers and instruments; ordered by exact OD × wall. |
ASTM A333 Gr 6 Pipe & Tube Chemical Composition
| Element | Weight % |
|---|---|
| Carbon | 0.30 max |
| Manganese | 0.29 – 1.06 |
| Silicon | 0.10 min |
| Phosphorus | 0.025 max |
| Sulphur | 0.025 max |
ASTM A333 Gr 6 Pipe & Tube Mechanical Properties
| Minimum values | Value |
|---|---|
| Tensile strength | 415 MPa · 60 ksi |
| Yield strength 0.2% | 240 MPa · 35 ksi |
| Elongation | 30% |
| Charpy impact | Tested at −45 °C |
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting range | 1420 – 1530 °C |
| Magnetic | Magnetic |
ASTM A333 Gr 6 Equivalent Grades
Values follow ASTM A333 Grade 6. Always check against the edition named on your purchase order.
ASTM A333 Gr 6 Pipe Weight Chart (kg/m)
Weight per metre (kg/m) = (OD − WT) × WT × 0.02466, with OD and wall thickness in mm. The factor comes from ASTM A333 Gr 6's density of 7.85 g/cm³.
Example: 4" Sch 40S (114.30 × 6.02 mm)
(114.30 − 6.02) × 6.02 × 0.02466 = 16.08 kg/m
| NPS | OD mm | Sch 10S kg/m | Sch 40S kg/m |
|---|---|---|---|
| ½" | 21.34 | 1.00 | 1.27 |
| 1" | 33.40 | 2.09 | 2.50 |
| 2" | 60.33 | 3.93 | 5.44 |
| 3" | 88.90 | 6.46 | 11.29 |
| 4" | 114.30 | 8.37 | 16.08 |
| 6" | 168.28 | 13.83 | 28.26 |
| 8" | 219.08 | 19.97 | 42.55 |
Six-digit Harmonized System heading (iron and steel, chapter 72–73). Your country adds its own digits — confirm with your customs broker. All HS codes.
ASTM A333 Gr 6 Pipe & Tube Price — What Decides It
Two quotes for "A333 Gr 6 pipe & tube" can differ by 20% and both be fair. We quote A333 Gr 6 pipe & tube per kg for full sizes and per piece for cut sizes. These six things move the price per kg, so you can compare offers like for like.
ASTM A333 Gr 6 Pipe & Tube Applications
ASTM A333 Gr 6 is specified when the cheaper grade will not survive the service but a higher alloy would be more than the job needs. These are the jobs our buyers use it for.
How your A333 Gr 6 pipe & tube order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked and material is PMI-tested before processing.
- 03Processing — cutting, machining or bevelling to your specification, with heat numbers marked.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Welding & Fabricating ASTM A333 Gr 6 Pipe & Tube
ASTM A333 Gr 6 welds by all common arc processes. A few points our buyers ask about:
| Matching filler | E7018-1 / ER80S-Ni1 |
|---|---|
| Over-alloyed filler | Impact-tested procedure required |
| Preheat | As required by the WPS and code for the thickness |
| Cutting | Thermal or abrasive cutting; grind off heat-tinted edges before welding |
Follow your approved WPS; this is general guidance. See also A333 Gr 6 fittings and A333 Gr 6 flanges for the matching pipe-system parts.
How to Order ASTM A333 Gr 6 Pipe & Tube: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Seamless or welded, and the standard
- NPS and schedule (or OD × wall for tube)
- Length — random or cut, and number of lengths
- End finish — plain, bevelled or threaded
- Certificate type and extra tests
- Delivery port, Incoterm and required date
ASTM A333 Gr 6 pipe & tube for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiASTM A333 Gr 6 pipe & tube — questions buyers ask
Is ASTM A333 Gr 6 the same as SA-333 Gr 6?
Yes. SA-333 Gr 6, Low-temperature carbon steel pipe, LTCS all refer to the same material, and pipe & tube is ordered to ASTM A333 Gr 6 whichever name is on the enquiry.
What is the difference between ASTM A333 Gr 6 pipe and tube?
Pipe is ordered by nominal pipe size and schedule, for carrying fluids. Tube is ordered by exact outside diameter and wall, for heat exchangers and instruments, and is held to tighter tolerances.
Seamless or welded ASTM A333 Gr 6 pipe — which should I buy?
Seamless (ASTM A333 Gr 6) is the default for pressure and critical service. Welded (ASTM A333 Gr 6) is cheaper in larger diameters and thinner walls and is accepted where the design code allows it.
What is the wall-thickness tolerance on ASTM A333 Gr 6 pipe?
Seamless pipe is normally allowed −12.5% on nominal wall under its general-requirements standard (ASTM A530). Allow for it in the pressure calculation or order on minimum wall.
Can ASTM A333 Gr 6 pipe be welded to carbon-steel pipe?
Yes, with the right filler: matching carbon or low-alloy filler is used; joints to stainless need ER309L. Follow a qualified WPS.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026