ASTM A106 / ASME SA-106 Grade A Specification

The table below lists the general specifications of ASTM A106 Grade A seamless pipe.

ASTM A106 / ASME SA-106 Grade A is a seamless carbon steel pipe used at high temperatures, in sizes NPS 1/8 to 48. It is common in power plants, petrochemical plants, and pressure piping.

Property Details
Standard ASTM A106 / ASME SA-106
Form Seamless pipe
Size Range NPS 1/8" to NPS 48"
Schedules SCH 20 through XXS
Lengths Single Random (17' to 24'), Double Random (36' to 44'), Cut-to-length
End Type Plain end, bevelled, threaded
Finish Hot-finished (NPS 2" and above), Cold-drawn (NPS 1-1/2" and below)

ASTM A106 Grade A Pipe Sizes and Dimensions

The table below shows the main sizes, schedules and tolerances for ASTM A106 Grade A pipes.

Parameter Details
Standard ASTM A106 Grade A / ANSI B36.10
Pipe Type Seamless Carbon Steel Pipe
NPS Range 1/8" to 48"
Wall Thickness As per standard pipe schedules
Available Schedules SCH 20, 30, 40 (STD), 60, 80 (XS), 100, 120, 140, 160, XXS
Manufacturing Process Hot-finished or cold-drawn (≤ NPS 1-1/2"); hot-finished (≥ NPS 2") unless specified
Custom Options Custom wall thickness available for sizes above NPS 4"
Outside Diameter Tolerance ±1%
Wall Thickness Tolerance -12.5% (no specified maximum limit)
Weight Tolerance +10% (depending on order basis)

ASTM A106 Grade A Seamless Pipe Price

ASTM A106 Grade A/B/C seamless pipes in India typically range from ₹65 to ₹90 per kg. Key pricing factors include the pipe's outside diameter, wall thickness, length, quantity and end finish. International market prices for Grade B SCH 80 are frequently listed around $1.19 - $1.31 per kg. In addition, market trends and the cost of raw materials influence the price per foot or per metre. Generally, smaller standard-size pipes are cheaper per unit length, while larger diameters with thicker walls are more costly. We provide competitive pricing across the full range from NPS 1/8" to NPS 48".

Chemical Composition of ASTM A106 Grade A Pipe

The table below shows the chemical composition limits for ASTM A106 Grade A, as specified in ASTM A106.

ASTM A106 Grade A seamless pipe has the least carbon of all three A106 grades, which makes it easier to bend and weld than Grades B and C.

Carbon C
Max 0.25%
Manganese Mn
0.27% to 0.93%
Phosphorus P
Max 0.035%
Sulphur S
Max 0.035%
Silicon Si
Min 0.10%
Chromium Cr
Max 0.40%
Copper Cu
Max 0.40%
Molybdenum Mo
Max 0.15%
Nickel Ni
Max 0.40%
Vanadium V
Max 0.08%

Mechanical Properties of ASTM A106 Grade A Pipe

The table below summarises the mechanical property requirements for grade A106 grades.

ASTM A106 Grade A must have at least 48,000 psi (330 MPa) tensile strength and 30,000 psi (205 MPa) yield strength. These values are lower than Grade B, which is why Grade A is better suited for cold bending and close coiling.

330
MPa
Tensile Strength
205
MPa
Yield Strength
Property Grade A
Tensile Strength, min 48,000 psi (330 MPa)
Yield Strength, min 30,000 psi (205 MPa)
Elongation, min Per ASTM A106 Table
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Equivalent Grades of ASTM A106 Grade A Pipe

ASTM A106 Grade A seamless carbon steel pipe has equivalent grades in many international standards. The table below shows these comparable grades used around the world.

Standard Designation
UNS K02501
Werkstoff Nr. 1.0305
JIS JIS G3454 STPG 370
Europe (EN) EN P235GH Grade 10216-2
Germany (DIN) DIN 17175 Grade St 35.8
UK (BS) NFA A 49-215 Grade TU 37-c

Industrial Applications of ASTM A106 Grade A Seamless Pipe

ASTM A106 Grade A seamless pipes are used where hot fluids or gases flow under pressure. They are chosen when the pipe must be cold-bent or closely coiled.

Oil & Gas Refineries

A106 Grade A seamless pipe carries process fluids through refinery piping networks. It handles hydrocarbon transfer lines operating at elevated temperatures.

Power Generation and Boiler Systems

This grade is used in boiler feedwater lines, steam distribution piping and condensate return systems. Its formability suits tight routing within boiler rooms.

Petrochemical and Chemical Processing

Petrochemical plants specify A106 Grade A pipe for process piping that needs cold bending during installation. Heat exchanger connections and coiled piping assemblies are common uses.

ASTM A106 Grade A vs Grade B vs Grade C

The information below gives specific guidance on when to select Grade A based on your requirements.

The three A106 grades differ in carbon content, tensile strength, and intended application.

Property Grade A Grade B Grade C
Carbon, max 0.25% 0.30% 0.35%
Tensile Strength, min 48,000 psi 60,000 psi 70,000 psi
Yield Strength, min 30,000 psi 35,000 psi 40,000 psi
Close Coiling / Cold Bending Preferred Permitted Not recommended
Common Use Formed piping, coils General high-temp service High-pressure systems

Choose Grade A for tight bends, close coils, or heavy forming. Its lower carbon improves flexibility. If bending isn’t needed and higher pressure is the priority, Grade B is usually the better option. Grade C suits applications demanding higher pressure ratings.

Shipping & Packaging

Main export packaging setup Heavy-duty wooden boxes Packing
Export Packaging Standard

We strictly follow seaworthy export handling standards to protect ASTM a106 grade a seamless-pipe from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

  • Heavy-duty wooden boxes with moisture barrier lining
  • HDPE stretch film wrapping on all bundles
  • Plastic end caps on threaded and plain-end pipes
  • Silica gel desiccants to minimize moisture exposure
  • ISPM-15 fumigated wooden packaging for export
shipping preparation Pipe Bundle Yard Staging
Shipping packaging Container End-Cap Protection
Shipping stock Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies carbon steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

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Frequently Asked Questions

Is A106 Pipe seamless? +
Yes, ASTM A106 exclusively covers seamless carbon steel pipe. It doesn't include welded pipe.
What is the difference between ASTM A106 Grade A and Grade B seamless Pipe? +
Grade A has lower carbon content (0.25% max vs 0.30%) and lower tensile strength (48,000 psi vs 60,000 psi). Grade A is preferred for close coiling and cold bending. Grade B is more commonly specified for general high-temperature pressure service.
What sizes are available in ASTM A106 Grade A seamless pipe? +
ASTM A106 Grade A seamless pipe is available from NPS 1/8" to NPS 48" with wall thicknesses from Schedule 20 through XXS per ANSI B36.10. We stock standard and non-standard sizes for prompt dispatch.
What is the ASME equivalent of ASTM A106? +
The ASME equivalent is ASME SA-106. ASME adopts the ASTM A106 standard for use in the Boiler and Pressure Vessel Code with an "SA-" prefix. The two designations are technically identical.
How to tell if a Pipe is seamless? +
A seamless pipe has no weld seam on the inner or outer surface. It is manufactured by piercing a solid steel billet. Required markings per ASTM A106 include the specification number, grade letter, and "S" for seamless on each pipe length.
What is the standard for Seamless Carbon Steel Pipe? +
ASTM A106 / ASME SA-106 is the primary standard for seamless carbon steel pipe intended for high-temperature service. ASTM A53 also covers seamless pipe, but is designated for lower-temperature and mechanical applications.
Where can I buy ASTM A106 Grade A seamless pipe? +
Sachiya Steel International supplies ASTM A106 Grade A seamless pipe in all standard sizes and schedules. We ship globally with mill test certificates, hydrostatic test reports, and seaworthy export packaging.
What is the price of ASTM A106 Grade A Seamless Pipe? +
In India, ASTM A106 price ranges from ₹65 to ₹90 per kg and internationally, the price ranges from $1.19 to $1.31 per kg. Pricing fluctuates depending on the pipe's dimensions, schedule and the amount needed, as well as prevailing market factors.

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