ASTM A192 Boiler Tubes Manufacturer and Supplier

ASTM A192 / ASME SA-192 is the standard specification for seamless carbon steel tubes intended for boilers and superheaters operating under high pressure. These tubes are produced from low-carbon steel containing C: 0.06–0.18%, Mn: 0.27–0.63%, P: max 0.035%, S: max 0.035%, and Si: max 0.25% based on heat analysis.

The minimum tensile strength is 325 MPa (47 ksi), the yield strength is around 180 MPa (26 ksi), and the elongation reaches 35%. ASTM A192 seamless boiler tubes are produced as either hot-finished or cold-finished. Heat treatment: final heat treatment at 650°C (1200°F) or higher is mandatory for all tubes.

Sachiya Steel International is a manufacturer, supplier, stockist, and exporter of ASTM A192 boiler tubes based in Mumbai, India. We’ve built over 20 years of experience in carbon steel tubing for boiler and superheater applications. Available outside diameters range from 12.7 mm to 177.8 mm (1/2“ to 7“) with minimum wall thickness from 2.2 mm to 25.4 mm (0.085“ to 1.000“). Tubes are supplied in hot-finished or cold-finished condition, with cold-finished tubes heat-treated at 650 °C or higher.

Our facility maintains a ready inventory of 1,500 to 2,000 metric tons, and we are ISO 9001, 14001 and 45001 certified. Every shipment includes mill test certificates per EN 10204 3.1/3.2 with full hydrostatic test documentation.

This page covers:

Specifications
Price
Chemical composition
Mechanical properties
Equivalent grades
Industrial applications
A192 vs A179 vs A210 comparison
Shipping and packaging
Frequently asked questions

ASTM A192 Boiler Tube Specifications

The table below lists key specifications of ASTM A192 / ASME SA-192 seamless boiler tubes, covering standards, sizes, forms, and delivery conditions.

Property	Details
Standard	ASTM A192 / ASME SA-192
Material	Carbon Steel (low-carbon, killed)
Outside Diameter	12.7 mm to 177.8 mm (1/2" to 7")
Wall Thickness (min)	2.2 mm to 25.4 mm (0.085" to 1.000")
Length	Single random, double random, cut-to-length (max 27 m approx.)
Form	Seamless (hot-finished or cold-finished)
Tube Ends	Plain end, bevelled end
Shape	Round, U-bend, coiled
Heat Treatment	Cold-finished: min 650 degrees C (1200 degrees F); hot-finished: none required
Testing	Flattening, flaring, hardness, hydrostatic, tension

ASTM A192 Boiler Tube Sizes and Dimensions

Refer to the following table for the standard size ranges and common wall thickness options for ASTM A192 boiler tubes.

Outside Diameter (OD)	OD in mm	Min. Wall Thickness (Inch)	Min. Wall Thickness (mm)
1/2"	12.7 mm	0.065"	1.65 mm
3/4"	19.05 mm	0.083"	2.11 mm
1"	25.4 mm	0.095"	2.41 mm
1-1/2"	38.1 mm	0.109"	2.77 mm
2"	50.8 mm	0.120"	3.05 mm
3"	76.2 mm	0.180"	4.57 mm
4"	101.6 mm	0.220"	5.59 mm

Outside Diameter Tolerances

The changes in outer diameter that are considered permissible for ASTM A192 tubing that has been hot-finished and seamless cold-drawn can be determined with the help of this table.

Specified OD (Inches)	Over Tolerance (Inch)	Under Tolerance (Inch)
Under 1"	0.004"	0.004"
1" to 1-1/2"	0.006"	0.006"
Over 1-1/2" to 2"	0.008"	0.008"
Over 2" to 2-1/2"	0.010"	0.010"
Over 2-1/2" to 3"	0.012"	0.012"
Over 3" to 4"	0.015"	0.015"

Wall Thickness Tolerances

The following table outlines the allowable minimum wall thickness variations, which are critical for calculating safe boiler operating pressures.

Specified Wall Thickness	Over Tolerance (%)	Under Tolerance (%)
0.095" and Under	20%	0%
Over 0.095" to 0.150"	18%	0%
Over 0.150" to 0.180"	15%	0%
Over 0.180"	13%	0%

ASTM A192 Boiler Tube Price

In India, ASTM A192 seamless boiler tubes are priced between ₹75 and ₹135 per kg, while in the USA, they range from $0.92 to $1.10 per kg ($920–$1,100 per ton). We supply competitive rates with mill test certification on every order. Contact our sales team for a current quotation based on your project requirements.

ASTM A192 / ASME SA-192 Chemical Composition

The chemical composition below is based on heat analysis per ASTM A192 / ASME SA-192. Low carbon and manganese content give these boiler tubes good weldability and formability.

Carbon C

0.06-0.18%

Manganese Mn

0.27-0.63%

Phosphorus P

0.035% max

Sulphur S

0.035% max

Silicon Si

0.25% max

ASTM A192 / ASME SA-192 Mechanical Properties

ASTM A192 boiler tubes must meet the following mechanical property requirements. Hardness limits vary by wall thickness.

47 / 325

MPa / ksi

Tensile Strength (min)

26 / 180

MPa / ksi

Yield Strength (min)

35%

in 2" (min)

Elongation (min)

137 HBW

Brinell Hardness

Hardness (max)

Property	Value
Tensile Strength (min)	325 MPa (47 ksi)
Yield Strength (min)	180 MPa (26 ksi)
Elongation in 2" (min)	35%
Brinell Hardness (max), WT 5.1 mm and above	137 HBW
Rockwell Hardness (max), WT below 5.1 mm	77 HRB

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ASTM A192 Equivalent Grades

ASTM A192 is recognised under several international standards. The table below maps equivalent designations for cross-referencing during procurement.

Standard	Designation
EN 10216-2	P235GH
DIN 17175	St 35.8/I (W.Nr. 1.0305)
BS 3059 Part 1	Grade 320
JIS G3461	STB340 (STB 35)
GB 3087	Grade 10 / Grade 20
IS 1914	IS 1914
GOST 8731 / 8733	GOST 8731 / GOST 8733

Industrial Applications of ASTM A192 Boiler Tubes

ASTM A192 boiler tubes serve high-pressure systems operating at pressures up to 9.8 MPa and temperatures from 450 degrees Celsius to 650 degrees Celsius. 3 primary sectors account for the majority of demand.

Power Generation

Thermal and coal-fired power stations use ASTM A192 tubes in water wall panels, superheaters, economisers, and reheaters. These components form the core heat transfer circuit of the boiler.

Petrochemical and Refinery

Refinery process heaters and fired boilers rely on A192 seamless tubes for steam generation and heat recovery. The tubes handle sustained thermal cycling in continuous plant operations.

Marine and General Engineering

Marine boilers aboard vessels and offshore platforms use ASTM A192 tubing for auxiliary steam systems. General engineering boilers in industrial facilities also specify this grade for medium-pressure service.

ASTM A192 vs ASTM A179 vs ASTM A210 Boiler Tubes

When selecting seamless carbon steel tubes, buyers frequently compare SA-192, SA-179, and SA-210. The primary distinctions between these three specifications are illustrated in the table below.
A192 and A179 share similar low-carbon compositions, with differences in manufacturing requirements and application scope.

Parameter	ASTM A192	ASTM A179	ASTM A210
Application	High-pressure boilers, superheaters	Heat exchangers, condensers	Higher-strength boiler service
Carbon (%)	0.06-0.18	0.06-0.18	0.27 max (Gr A1)
Manganese (%)	0.27-0.63	0.27-0.63	0.93 max (Gr A1)
Tensile Strength (min)	325 MPa (47 ksi)	325 MPa (47 ksi)	415 MPa (60 ksi)
Yield Strength (min)	180 MPa (26 ksi)	180 MPa (26 ksi)	255 MPa (37 ksi)
Condition	Hot-finished or cold-finished	Cold-drawn only	Hot-finished or cold-finished

Shipping & Packaging

Heavy-duty wooden boxes Packing

Export Packaging Standard

We strictly follow seaworthy export handling standards to protect ASTM A192 Boiler Tubes 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

Pipe Bundle Yard Staging

Container End-Cap Protection

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.

USA
Canada

Frequently Asked Questions

What is ASTM A192 and what does it cover?+

ASTM A192 / ASME SA-192 is the standard specification for minimum-wall-thickness, seamless carbon steel boiler and superheater tubes for high-pressure service. It covers tubes produced by the seamless process in hot-finished or cold-finished condition.

What sizes are available for ASTM A192 Boiler Tubes?+

Outside diameters range from 12.7 mm to 177.8 mm (1/2" to 7") with minimum wall thickness from 2.2 mm to 25.4 mm (0.085" to 1.000"). We supply single random, double random, and cut-to-length options.

What is the difference between ASTM A192 and ASTM A179 Boiler Tubes?+

A192 uses low-carbon steel (0.06–0.18% C) for high-pressure boiler duty. Meanwhile, A210 features medium-carbon steel (0.27% max C for Grade A1) and delivers 415 MPa tensile strength. That is much higher than the 325 MPa you get with A192. It is a stronger, tougher material choice.

What is the difference between ASTM A192 and ASTM A210 Boiler Tubes?+

A192 uses low-carbon steel (C: 0.06–0.18%) for high-pressure boiler service. A210 uses medium-carbon steel (C: 0.27% max for Grade A1) and delivers higher tensile strength at 415 MPa (60 ksi) compared to A192’s 325 MPa (47 ksi).

What type of tubing is used in Boiler Tubes?+

High-pressure boilers use seamless carbon steel tubes per ASTM A192 or A210 or alloy steel tubes per ASTM A213, depending on system temperature and pressure.

What tests are required for ASTM A192 Boiler Tubes?+

Five mandatory tests apply: flattening, flaring, hardness, hydrostatic, and tension. Each tube lot ships with mill test certificates documenting full compliance with ASTM A192 requirements.

What is the heat treatment requirement for ASTM A192 Tubes?+

Hot-finished tubes require no heat treatment. Cold-finished tubes must be heat-treated at a minimum of 650 degrees Celsius (1200 degrees Fahrenheit) after final cold-finishing operations.

Where can I buy ASTM A192 Boiler Tubes?+

Sachiya Steel International supplies ASTM A192 boiler tubes from our Mumbai warehouse with ready stock in standard sizes. We provide mill test certificates, hydrostatic test reports, and seaworthy export packaging on every order.

ASTM A192 Boiler Tubes: Seamless Carbon Steel Tubes for High-Pressure Service