Standards · ASME and ASTM · ASTM A106/A106M

ASTM A106/A106M: Seamless carbon steel pipe for high-temperature service

The black seamless pipe of the ASME world for steam, water, gas and air at elevated temperature – killed steel, seamless only, dimensions to B36.10M, suitable for bending, flanging and welding.

Issued by: ASTM
Edition (publisher, as of 2 October 2026): 2026
Material specification: Seamless carbon steel pipe for high-temperature service
European counterpart: EN 10216-2 (P235GH 1.0345, P265GH 1.0425)
Belongs with: ASME B36.10M · ASTM A234/A234M · ASTM A105/A105M · ASTM A333/A333M
At Zickwolff: we carry – from stock or to order, lead time on request

Scope: sizes, classes, grades

NPS 1/8 to 48 in the schedules of B36.10M. Grades A, B and C by strength: Grade B (the usual one) tensile min. 415 MPa (60 ksi), yield min. 240 MPa (35 ksi), carbon max. 0.30 %. Grade A softer (330/205 MPa), Grade C stronger (485/275 MPa). Tolerances: wall min. −12.5 %. No impact requirement – below −29 °C use A333.

Product form

Seamless pipe, hot-finished or cold-drawn.

Grades and their European counterparts

ASTM A106/A106M - Grades and their European counterparts
Grade	Type	Tensile / yield min. (MPa)	European counterpart	Limits of the comparison	At Zickwolff
Gr. A	carbon steel	330 / 205	P235GH 1.0345 · EN 10216-2	comparable by strength, not identical in analysis	on request
Gr. B	carbon steel	415 / 240	P265GH 1.0425 · EN 10216-2	comparable by strength, not identical in analysis	deliverable
Gr. C	carbon steel	485 / 275	not stated in our sources	no common EN grade – compare by analysis and certificate	on request

A106 Grade B is compared with P265GH, Grade A with P235GH to EN 10216-2 – by strength, not by analysis. Dual-certified pipe (A106 B / A53 B / API 5L B) is common.

Use in Europe: the Pressure Equipment Directive

Under the Pressure Equipment Directive an ASTM material has no presumption of conformity: it needs a European material approval or a particular material appraisal (PMA) by the equipment manufacturer, in categories III and IV assessed by the notified body. Comparisons with EN grades are orientation, never a one-to-one equivalence – chemistry bands, test scope and certificate differ. Sizes are NPS and schedule, EN sizes outside diameter × wall – a schedule wall rarely equals an EN wall.

Marking on the part

Stencilled on the pipe: manufacturer, A106 (often together with A53 and API 5L), grade, NPS and schedule, heat number, test marks (hydro or NDE), length, S for supplementary requirements.

The standard family: dimensions, material, pipe

ASME B36.10M · ASTM A234/A234M · ASTM A105/A105M · ASTM A333/A333M

At Zickwolff

Seamless pipe A106 Gr. B in the common schedules is part of our range, cut to length on request, with certificate 3.1 – the matching fittings in A234 WPB and flanges in A105 come from one source.

Dimensions Dimension tables for this standard are available on request – we work from manufacturer catalogues, not from copied standard tables.

Frequently asked questions about ASTM A106/A106M

Can I use this ASTM material in a pressure line under the PED?

Yes, but without presumption of conformity: the equipment manufacturer needs a European material approval or a particular material appraisal (PMA), in categories III and IV assessed by the notified body. For equipment under Article 4(3) (sound engineering practice) this does not apply. We supply the material with certificate 3.1 – the appraisal is the manufacturer's.

Must a plant with ASME parts be inspected more often?

No – the inspection interval comes from the operating law of the country, not from the code of the part. In Germany the Betriebssicherheitsverordnung (Annex 2 Section 4) sets maximum intervals, the operator fixes the interval in the risk assessment and the inspector may shorten it (TRBS 1201 Part 2) where design or manufacture give reason to. Operators often inspect more frequently anyway. This is general information, not legal advice – the legal text is binding.

A106 or A53?

A106 is seamless only, killed steel and meant for elevated temperature – A53 also covers welded pipe. Much pipe is dual-certified A106 B / A53 B / API 5L B.

Is A106 Gr. B the same as P265GH?

Comparable by strength (415/240 MPa), not identical: analysis bands and test scope differ, and P265GH carries the PED presumption of conformity, A106 does not.

Parts to ASME and ASTM – from one source

Tell us standard, size (NPS and schedule or Class), material grade, certificate and quantity – we check what is in stock, what we procure and which European part would do the same job.

Send an inquiry

Your inquiry to Zickwolff

Send us what you have – designation, standard, quantity, date. We will clarify the rest with you.

One item or a question

Send inquiry

Not in stock? We procure it – single items too.

Designation, standard and quantity are enough.

Several items

Send bill of materials

200 items? One parts list is enough – we deliver complete.

Attach it as a file.

Helpful if already known: project and country, date needed, certificates, packaging and language of the packing lists. If anything is missing, we will ask.

It is urgent

Request express

When do you need it? Express delivery, to the site if required.

Tell us by when you need the material – we will tell you what is possible.

← Back to ASME and ASTM standards

Basis: the publicly accessible scopes and abstracts of ASME and ASTM (editions as of 2 October 2026), manufacturer catalogues, a trade reference catalogue DIN/EN/ASME and specialist sources for marking and impact test values – the legal statements follow Directive 2014/68/EU and the German Betriebssicherheitsverordnung. No standard text was reproduced – the current original edition is binding. Comparisons with EN grades are orientation, not equivalence. Information without guarantee, no legal advice, no prices.