ASTM A213 T11 Tubes Manufacturer & Supplier

ASTM A213 T11 tube is a 1.25Cr-0.5Mo-Si chrome-molybdenum alloy conduit built for high-temperature pressure service. The T11 designation under ASTM A213 / ASME SA-213 identifies a low-alloy steel containing 1.00 to 1.50% chromium and 0.44 to 0.65% molybdenum, with controlled additions of carbon, manganese, and silicon. These alloying elements give T11 tubes their defining features, such as strong creep resistance and reliable oxidation performance at elevated temperatures. With a minimum tensile strength of 415 MPa (60 ksi) and a minimum yield strength of 205 MPa (30 ksi), Grade T11 tubes handle sustained pressure loads in boiler circuits and superheater banks.

Sachiya Steel International is a trusted manufacturer and supplier of ASTM A213 T11 tubes. We have operated from our facility in Mumbai, India, since 2005. We stock and supply these seamless ferritic alloy steel boiler tubes in outside diameters from 6.35 mm to 127 mm, wall thicknesses from 1.0 mm to 12.7 mm, and both standard and custom cut lengths. We can supply hot-finished or cold-drawn seamless tubes to meet your dimensional and surface finish requirements.

ASTM A213 T11 seamless tubes comply with ASTM A213 / ASME SA-213 and are suitable for use in power generation boilers, oil and gas refineries, chemical plants, and petrochemical processing facilities. We have over 2 decades of experience and hold ISO 9001, ISO 14001, and ISO 45001 certifications.

This page covers:

T11 Specification
Pricing
Chemical Composition
Mechanical Properties
Equivalent Grades
Industrial Applications
T11 vs T22 Comparison
Heat Treatment
Shipping and Packaging
Frequently Asked Questions

Specification for ASTM A213 T11 Tubes

ASTM A213 T11 tubes specifications, including standards, dimensions, forms, finishes, and more, are covered in the table below.

Parameter	Specification
Standard	ASTM A213 / ASME SA213
Material Type	Seamless Ferritic Alloy Steel Tube
Manufacturing Process	Seamless (Hot Finished / Cold Drawn)
Outer Diameter Range	6.35 mm to 127 mm
Wall Thickness Range	1.0 mm to 12.7 mm
Length	Single Random, Double Random, Cut Length
End Finish	Plain End (PE), Beveled End (BE)
Surface Finish	Black, Pickled, Annealed
Heat Treatment	Normalised and Tempered
Form	Round Tubes
Condition	Hot Finished / Cold Drawn

ASTM A213 T11 Tube Sizes

The table below outlines the standard size range and dimensional availability of ASTM A213 T11 seamless tubes.

Parameter	Specification
Outer Diameter Range	6.35 mm (1/4") to 127 mm (5")
Wall Thickness Range	1.0 mm to 12.7 mm
Standard Length	5,800 mm to 12,000 mm
Custom Length	Up to 16,000 mm (on request)
Tube End Types	Plain End (PE), Bevelled End (BE), Threaded

ASTM A213 T11 Tube Wall Thickness Tolerances

The table below summarises wall thickness tolerance characteristics based on the manufacturing process.

Minimum Wall Thickness Tolerance (Hot-Finished Tubes)

Outside Diameter	Wall Thickness Range	Tolerance
≤ 4" (101.6 mm)	≤ 2.4 mm	+40% / -0%
≤ 4" (101.6 mm)	2.4 - 3.8 mm	+35% / -0%
≤ 4" (101.6 mm)	3.8 - 4.6 mm	+33% / -0%
≤ 4" (101.6 mm)	> 4.6 mm	+28% / -0%
> 4" (101.6 mm)	2.4 - 3.8 mm	+35% / -0%
> 4" (101.6 mm)	3.8 - 4.6 mm	+33% / -0%
> 4" (101.6 mm)	> 4.6 mm	+28% / -0%

Minimum Wall Thickness Tolerance (Cold-Finished Tubes)

Outside Diameter	Tolerance
≤ 1.5" (38.1 mm)	+20% / -0%
> 1.5" (38.1 mm)	+22% / -0%

ASTM A213 T11 Tube Weight Chart

The dimensions in the chart below follow NPS (Nominal Pipe Size) per ANSI/ASME B36.10M.

NPS	OD (in)	WT (in)	ID (in)	Wt (lb/ft)	Schedule	Designation
1/2	0.840	0.109	0.622	0.85	40	STD
		0.147	0.546	1.09	80	XHY
		0.188	0.464	1.31	160	-
		0.294	0.252	1.72	-	XXHY
3/4	1.050	0.113	0.824	1.13	40	STD
		0.154	0.742	1.48	80	XHY
		0.219	0.612	1.95	160	-
		0.308	0.434	2.44	-	XXHY
1	1.315	0.133	1.049	1.68	40	STD
		0.179	0.957	2.17	80	XHY
		0.250	0.815	2.85	160	-
		0.358	0.599	3.66	-	XXHY
1-1/4	1.660	0.140	1.380	2.27	40	STD
		0.191	1.278	3.00	80	XHY
		0.250	1.160	3.77	160	-
		0.382	0.896	5.22	-	-
1-1/2	1.900	0.145	1.610	2.72	40	STD
		0.200	1.500	3.63	80	XHY
		0.281	1.338	4.86	160	-
		0.400	1.100	6.41	-	-
2	2.375	0.154	2.067	3.66	40	STD
		0.218	1.939	5.03	80	XHY
		0.344	1.687	7.47	160	-
		0.436	1.503	9.04	-	XXHY
2-1/2	2.875	0.203	2.469	5.80	40	STD
		0.276	2.323	7.67	80	XHY
		0.375	2.125	10.02	160	-
		0.552	1.771	13.71	-	XXHY
3	3.500	0.216	3.068	7.58	40	STD
		0.300	2.900	10.26	80	XHY
		0.438	2.624	14.34	160	-
		0.600	2.300	18.60	-	XXHY
3-1/2	4.000	0.226	3.548	9.12	40	STD
		0.318	3.364	12.52	80	XHY
4	4.500	0.237	4.026	10.80	40	STD
		0.337	3.826	15.00	80	XHY
		0.438	3.624	19.02	120	-
		0.531	3.438	22.53	160	-
		0.674	3.152	27.57	-	XXHY
5	5.563	0.258	5.047	14.63	40	STD

ASTM A213 T11 Tube Price

ASTM A213 T11 tube pricing is between ₹120 and ₹355 per kilogram or $1.50–$4.50/kg. The final price depends on outside diameter, wall thickness, length, quantity, heat treatment condition, and current alloy surcharges. Cr-Mo alloy tubes cost more than plain carbon steel due to chromium and molybdenum content. Smaller diameters typically command a higher per-kilogram rate because of greater manufacturing complexity. Contact our team with your size and quantity requirements for a competitive quotation.

ASTM A213 / ASME SA-213 T11 Chemical Composition

ASTM A213 T11 is a 1.25Cr-0.5Mo-Si low-alloy ferritic steel with chromium and molybdenum as its principal alloying additions. The controlled balance of these elements provides oxidation resistance and creep strength at temperatures beyond the capability of plain carbon steel.

CarbonC

0.05 - 0.15

ManganeseMn

0.30 - 0.60

PhosphorusP

0.025 max

SulfurS

0.025 max

SiliconSi

0.50 - 1.00

ChromiumCr

1.00 - 1.50

MolybdenumMo

0.44 - 0.65

ASTM A213 T11 Tube Mechanical Properties

ASTM A213 T11 tube mechanical properties in the annealed or normalised and tempered condition are listed in the table below. The 30% minimum elongation confirms good ductility for cold bending and flaring operations during boiler fabrication.

415/60

MPa (ksi)

Tensile Strength (min)

205/30

MPa (ksi)

Yield Strength (min)

Elongation in 2" (min)

HRB

Hardness (max)

Property	Value
Tensile Strength (min)	415 MPa (60 ksi)
Yield Strength (min)	205 MPa (30 ksi)
Elongation in 2" (min)	30%
Hardness (max)	85 HRB

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ASTM A213 T11 Equivalent Grades

ASTM A213 T11 equivalent materials are listed in the table below. These international designations cover the same 1.25Cr-0.5Mo chemistry under different regional standards.

Standard	Designation
UNS	K11597
EN 10216-2	13CrMo4-5 (W.Nr. 1.7335)
DIN 17175	13CrMo44
JIS G3462	STBA 23
GB 5310	15CrMo

ASTM A213 T11 Tube Industrial Applications

ASTM A213 T11 seamless tubes are used in applications operating at temperatures up to 560-565 °C in power generation, oil and gas refining, chemical processing, and petrochemical plants. The 3 primary application sectors are listed below.

Power Generation and Boilers

T11 chrome-moly tubes are used in waterwall, superheater, and reheater sections of coal- and gas-fired plants, forming a key part of subcritical boiler systems.

Oil and Gas Refineries

Grade T11 tubes are used in refinery heaters and heat exchanger bundles handling hydrocarbons and hydrogen at elevated temperatures.

Chemical and Petrochemical Processing

SA-213 T11 tubes are installed in process heaters and reboilers within petrochemical plants for reliable high-temperature performance.

ASTM A213 T11 vs T22 Tubes

T11 (1.25Cr-0.5Mo) is suitable for service up to approximately 565 °C. While T22 (2.25Cr-1Mo) offers higher creep resistance for temperatures approaching 600 °C. T22 contains roughly double the chromium and molybdenum of T11, which increases its high-temperature strength but also raises material cost.

Property	T11 (1.25Cr-0.5Mo)	T22 (2.25Cr-1Mo)
Chromium	1.00 - 1.50%	1.90 - 2.60%
Molybdenum	0.44 - 0.65%	0.87 - 1.13%
Tensile Strength (min)	415 MPa	415 MPa
Max Service Temp (ASME Sec I)	560-565 °C	649 °C
Creep Resistance	Lower	Higher
Relative Cost	Lower	Higher

For boiler sections operating below 565 °C, T11 is the more cost-effective choice. Projects with higher-temperature zones often specify T22 for those sections.

Heat Treatment for ASTM A213 T11 Tubes

ASTM A213 T11 tubes are supplied in either full annealed or isothermal annealed condition, or in normalised and tempered (N+T) condition. For N+T delivery, the minimum tempering temperature is 650 oC (1200 oF). The heat treatment condition affects final mechanical properties and must be specified during placing an order.

Shipping & Packaging

Heavy-duty wooden boxes Packing

Export Packaging Standard

We strictly follow seaworthy export handling standards to protect ASTM A213 T11 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

Tube Bundle Yard Staging

Container End-Cap Protection

Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies Alloy 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 material is ASTM A213 T11 Tube made of?+

ASTM A213 T11 is a 1.25Cr-0.5Mo-Si low-alloy ferritic steel containing 1.00 to 1.50% chromium and 0.44 to 0.65% molybdenum. It is designed for high-temperature boiler and superheater tube service.

What is the difference between T11 and T22 Tubes?+

T11 (1.25Cr-0.5Mo) and T22 (2.25Cr-1Mo) differ in chromium and molybdenum content. T22 has higher Cr-Mo levels, providing greater creep resistance and a higher practical service temperature ceiling, but at increased cost.

What is the equivalent of ASTM A213 T11 Tubes?+

ASTM A213 T11 (UNS K11597) equivalents include EN 10216-2 13CrMo4-5 (W.Nr. 1.7335), JIS G3462 STBA 23, GB 5310 15CrMo, and BS 3059 Grade 620-440.

What is the maximum service temperature for ASTM A213 T11 Tubes?+

Per ASTM A213 T11 tubes can be used up to 560-565 °C (1040-1050 oF).

What welding rod is used for ASTM A213 T11 Tubes?+

T11 tubes are welded using ER80S-B2 (GTAW) or E8018-B2 (SMAW) filler metals. Preheat of 200 to 300 °C and post-weld heat treatment at 650 to 750 °C are required per AWS D10.8 guidelines.