ASTM A333 Grade 6 Pipes

ASTM

A333 Gr.6 vs A106 Gr.B

Choose	When	Watch-outs
A333 Gr.6	Design needs low-temp toughness / impact tests	Confirm test temperature on PO
A106 Gr.B	Elevated-temperature process / steam	Not a LTCS substitute
API 5L Gr.B PSL2	Line-pipe transportation systems	Different code / annex package

Copy-paste RFQ

ASTM A333 / ASME SA333 Grade 6 seamless NPS: ____ Sch/wall: ____ Length: ____ Qty: ____ Impact test temp: ____ MTC: 3.1/3.2 Destination: ____

Email to sales@savoypipinginc.com with destination and any IBR / NACE / TPI notes.

A333 Grade 6 / ASME SA333 Low-Temperature Pipe

LTCS seamless pipe — impact tested to -50°F (-45°C)

Savoy Piping Inc. supplies ASTM A333 Grade 6 (ASME SA333 Gr 6) — the workhorse low-temperature carbon steel pipe for cold process, gas and hydrocarbon piping that needs notch toughness.

Typical strength: tensile min 60 ksi (415 MPa), yield min 35 ksi (240 MPa). Carbon max 0.30%, manganese 0.29–1.06%, silicon min 0.10%. Impact temperature for Grade 6 is -50°F (-45°C).

Related: A333 Grade 3, A106 Grade B, Carbon Steel Hub.

What is ASTM A333 Grade 6?

Grade 6 is the most frequently ordered A333 grade for low-temperature service. Pipe is heat-treated to control microstructure and impact-tested so it retains toughness at the specified low temperature — unlike standard high-temp carbon grades.

Also see: Carbon steel seamless hub · API 5L hub · CS buttweld.

Typical applications

• Low-temperature process and utility piping
• Gas processing, LPG and cold hydrocarbon lines
• Offshore / cold-climate facilities with MDMT around -45°C
• Projects specifying LTCS SA333 Gr 6 with Charpy MTCs

How buyers should order

State grade, seamless/welded construction, OD/wall, heat-treatment condition, impact test temperature and specimen orientation, plus any NACE / coating extras. Heavier walls can limit low-temp impact capability — confirm size availability early.

A333 Grade 6 Pipes range

ASTM A333 Grade 6 Pipes

Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness

ASTM A333 (ASME S/A-333) Pipe grades permit low temperature service. This specification covers nominal (average) walled pipe almost exclusively in seamless. Several grades of ferritic steel are included. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse effect on low-temperature impact properties. A333 pipe is furnished to nine different grades designated by numbers 1, 3, 4, 6, 7, 8, 9, 10, & 11. Discussed herein are Grades 1, 3 and 6.

Savoy Piping Inc. stocks a full range of A333 Grade 6 seamless Carbon Steel Pipe.

A333 Pipe Specifications

A/SA 333
NPS 1/4″- 30″
Schedules 10 through 160, STD, XH and XXH

Heat Treatment Requirements for A333 Grade 6 Pipes

AllSeamless and Welded pipe shall be treated to control their microstructure by the following methods: Normalizing per A 333/A 333M-05 section 4.2.1.1; section 4.2.1.2 or section 4.2.1.3 Quenched and Tempered per A 333/A 333M – 05 section 4.2.2.1 Double Normalized and Tempered per A 333/A 333M – 05 section 4.2.2.2

For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese. When Grade 6 is ordered under this specification, Supplying an alloy grade that specifically requires the addition of any element other than those listed for the ordered grade is not permitted. However, the addition of elements required for the deoxidation of the steel is permitted.

Tensile Requirements for ASTM A333 Grade 6 Pipes

• The material shall conform to the requirements as proscribed:

Impact Requirements for ASTM A333 Grade 6 Pipes

For Grades 1, 3 and 6, the notched-bar impact properties of each set of three impact specimens, including specimens for the welded joint in welded pipe with wall thicknesses of 0.120 in. [3 mm] and larger, shall not be less than the values prescribed:

Mechanical Testing for ASTM A333 Grade 6 Pipes

Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test for material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. for small lots, at least one pipe shall be tested. 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. Hydrostatic Test 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.

Lengths for ASTM A333 Grade 6 Pipes

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

Required Markings on Each Length for ASTM A333 Grade 6 Pipes

(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) In addition, markings will include:

except when a lower test temperature is required because of reduced specimen size, in which case, the High Temperature and higher impact test temperature applicable to a full size specimen would be marked ** when the size of the finished pipe is insufficient to obtain subsize impact specimens, the marking shall not include the letters “LT” followed by an indicanted test temperature unless Supplementary Requirement S! is specified.

Referenced Documents for ASTM A333 Grade 6 Pipes Tube

• ASTM A 370 Test Methods and Definitions for Mechanical testing of  Steel Products
• ASTM A999/A 999M Specification for General requirements for Alloy and   Stainless Steel Pipe
• ASTM A 671 Specification for General requirements for Alloy and  Stainless Steel
• ASTM E 23 Test Methods for Notched bar Impact testing of Metallic Materials

Order Information for ASTM A333 Grade 6 Pipes

• Orders for material under this specification should include the following, as required, to describe the desired material adequately:

A333 Grade 6 Pipes Price

Frequently asked questions — ASTM A333 Grade 6

What is ASTM A333 Grade 6 used for?

A333 Grade 6 is the most common low-temperature carbon steel (LTCS) pipe grade, used where notch toughness is required — typically impact tested at -50°F (-45°C) for cold process and hydrocarbon service.

Can I use A106 Grade B instead of A333 Grade 6?

Not for low-temperature service that requires impact testing. A106 is a high-temperature seamless standard without A333 notch-toughness requirements. Follow the PO grade and MDMT.

A333 Grade 6 vs Grade 3?

Grade 6 is standard LTCS (~-50°F). Grade 3 is a nickel grade for much colder service (~-150°F). Pick by design minimum temperature, not price alone.

Do you supply SA333 Grade 6 with impact certificates?

Yes. ASTM A333 / ASME SA333 Grade 6 pipe is supplied with heat treatment and Charpy impact results on EN 10204 3.1 / 3.2 MTCs when required.

Export & documentation

We supply this product for domestic and export projects with mill test certificates (EN 10204 3.1 standard; 3.2 / TPI on request). Include destination, preferred Incoterms and any inspection body on the RFQ.