USA Piping Solution has built its reputation as a trusted manufacturer, supplier, and exporter of ASTM A213 T9 / SA 213 T9 alloy steel seamless tubes more commonly known as 9Cr-1Mo chrome moly tubes (UNS K90941). These tubes are purpose-built for demanding high-temperature, high-pressure environments, and every piece we produce meets the full requirements of ASTM A213 and ASME SA 213 standards.
Whether you need cold-drawn or hot-finished tubing, we've got you covered. Our T9 boiler tubes, superheater tubes, and heat exchanger tubes are available with IBR certification on request, and align with EN 10216-2 (10CrMo9-10) and DIN equivalent specifications making them a reliable choice for projects across the USA, Europe, Middle East, and Asia. Industries we regularly serve include power generation, oil & gas, petrochemical, and fertilizer.
Beyond T9, our inventory spans a wide range of ASTM A213 grades including T91, T1, T11, T22, T5, and T2 tubes so you don't have to juggle multiple suppliers for your tubing needs.
Quality isn't just a checkbox for us. Before any T9 tube leaves our facility, it goes through a thorough testing process: hydrostatic testing, Positive Material Identification (PMI), ultrasonic inspection, and hardness evaluation. This ensures that what reaches your site is exactly what international standards demand — and what your application deserves.
What is ASTM A213 T9 / SA 213 T9 Alloy Steel Seamless Tube?
ASTM A213 Grade T9 seamless tubes are ferritic alloy steel seamless tubes engineered for use in high-temperature and high-pressure applications such as boilers, heat exchangers, and superheaters. Belonging to the chrome moly T9 tube family, these tubes are alloyed with 9% chromium and 1% molybdenum — elements that significantly enhance mechanical strength, oxidation resistance, and thermal stability.
Known for their superior creep resistance, excellent weldability, and extended operational lifespan, T9 boiler tubes are a top choice in the power generation, oil & gas, and petrochemical industries. Produced as per ASTM A213 standards, each tube undergoes cold drawing or hot finishing to achieve consistent wall thickness, smooth internal surfaces, and precise dimensional control.
ASTM A213 T9 Tube Specifications & Size Chart
Our ASTM A213 T9 / SA 213 T9 Tubes are manufactured to meet stringent international standards for high-temperature service in pressure equipment.
|
Specification |
Details |
|
Standard |
ASTM A213 / ASME SA 213 |
|
Grade |
T9 (UNS K90941) – Chrome Moly Alloy Steel (9Cr-1Mo) |
|
Manufacturing Process |
Seamless, Cold Drawn / Hot Finished |
|
Outer Diameter |
6 mm to 101.6 mm (½" to ~4") |
|
Wall Thickness |
1 mm to 12 mm (customizable); SCH 40, SCH 80 schedules available |
|
Length |
Up to 12 meters (or as per client request) |
|
Surface Finish |
Annealed, Pickled, Polished, or Oiled |
|
End Finishing |
Plain End, Beveled End, Threaded (on request) |
|
Form |
Round Tubes – Straight Lengths & U-Bends |
|
Heat Treatment |
Normalized, Tempered, Annealed |
|
Testing |
Hydrostatic Test, NDT, Hardness Test, PMI, Ultrasonic Testing |
ASTM A213 T9 Size Chart – OD × Wall Thickness (Common Sizes)
OD (mm) |
Wall Thickness (mm) |
Schedule |
Weight (kg/m approx.) |
12.7 | 1.65 | SCH 40 | 0.46 |
19.05 | 2.11 | SCH 40 | 0.89 |
25.4 | 2.77 | SCH 40 | 1.56 |
31.75 | 3.05 | SCH 40 | 2.18 |
38.1 | 3.05 | SCH 40 | 2.65 |
50.8 | 3.68 | SCH 40 | 4.25 |
63.5 | 5.16 | SCH 80 | 7.44 |
76.1 | 7.11 | SCH 80 | 12.00 |
88.9 | 7.62 | SCH 80 | 15.30 |
101.6 | 8.08 | SCH 80 | 18.70 |
Note: Custom OD, wall thickness, and lengths are available on request. Weight per meter figures are approximate. Contact our sales team for the current T9 tube price list and stock availability.
ASTM A213 T9 Mechanical Properties (UNS K90941)
ASTM A213 T9 tubes exhibit excellent mechanical strength, thermal resistance, and stability under high-pressure conditions, making them ideal for critical applications in boilers, superheaters, and heat exchangers.
|
Property |
Value |
|
Tensile Strength |
≥ 415 MPa (60,200 psi) |
|
Yield Strength |
≥ 205 MPa (29,700 psi) |
|
Elongation |
≥ 30% (in 50 mm gauge length) |
|
Hardness |
≤ 85 HRB (Rockwell Hardness, B scale) |
T9 Chrome Moly Tube Chemical Composition (9Cr-1Mo)
ASTM A213 T9 tubes are composed of a carefully balanced alloy of chromium (8–10%) and molybdenum (0.90–1.10%), which provides excellent strength, heat resistance, and oxidation protection. The UNS designation for this grade is UNS K90941.
|
Element |
Composition (%) |
|
Carbon (C) |
≤ 0.15 |
|
Manganese (Mn) |
0.30 – 0.60 |
|
Phosphorus (P) |
≤ 0.025 |
|
Sulfur (S) |
≤ 0.025 |
|
Chromium (Cr) |
8.00 – 10.00 |
|
Molybdenum (Mo) |
0.90 – 1.10 |
ASTM A213 T9 Equivalent Standards (EN / DIN / JIS)
The following table maps ASTM A213 T9 to its internationally recognized equivalent standards, helping engineers and procurement teams cross-reference specifications:
ASTM / ASME |
EN Standard |
DIN |
JIS |
UNS No. |
Common Name |
ASTM A213 T9 / SA 213 T9 |
EN 10216-2 10CrMo9-10 |
DIN 17175 13CrMo44 |
JIS STBA26 |
UNS K90941 |
9Cr-1Mo / Chrome Moly T9 |
ASTM A213 T9 Boiler Tube & Heat Exchanger Applications
ASTM A213 T9 / SA 213 T9 tubes are widely used across industries that demand high-performance materials capable of withstanding elevated temperatures, pressure, and corrosive environments. Their excellent mechanical strength, thermal stability, and oxidation resistance make them an ideal choice for critical heat-transfer systems.
- Power Generation Plants: Used extensively in T9 boiler tubes, superheaters, and reheaters due to their ability to perform under thermal stress and high-pressure steam environments. Also used in Heat Recovery Steam Generators (HRSG).
- Petrochemical & Refining: Ideal for T9 heat exchanger tubes and furnace components handling corrosive media and elevated process temperatures. Excellent resistance to sulfur compounds.
- Oil & Gas Processing: Suitable for equipment exposed to fluctuating pressures and aggressive chemical compounds in upstream and downstream operations, including refinery furnaces and process heaters.
- Chemical & Fertilizer Plants: Used in reactors and piping systems that require materials with high creep resistance and long service life. T9 performs reliably at moderate high temperatures in chemical production.
- Industrial Boilers & HRSG: T9 superheater tubes are critical in heat recovery steam generators and industrial boiler systems due to their thermal fatigue resistance and oxidation protection.
- Gas Processing: T9 tubes are used in heaters and heat exchangers within natural gas processing plants, offering a well-balanced performance step up from carbon steel without the premium cost of higher alloys.
ASTM A213 T9 vs T91 – Key Differences
Engineers frequently compare T9 and T91 when selecting chrome moly alloy steel for high-temperature applications. While both grades share chromium and molybdenum as primary alloying elements, they differ significantly in performance characteristics:
Property |
ASTM A213 T9 (9Cr-1Mo) |
ASTM A213 T91 (9Cr-1Mo-V) |
UNS Number | UNS K90941 | UNS K91560 |
Chromium Content | 8.00 – 10.00% | 8.00 – 9.50% |
Additional Alloying | None beyond Cr-Mo | Vanadium (V), Niobium (Nb), Nitrogen (N) |
Tensile Strength | ≥ 415 MPa | ≥ 585 MPa |
Max Operating Temp | ~550°C (1020°F) | ~620°C (1150°F) |
Creep Resistance | Good | Superior |
Weldability | Good | Requires strict heat treatment |
Cost | Lower | Higher |
Typical Use | Boilers, heat exchangers at moderate high temps | Ultra-supercritical boilers, high-pressure superheaters |
Summary: T9 is a cost-effective choice for applications up to ~550°C. For demanding supercritical power plant service requiring temperatures above 550°C, ASTM A213 T91 Tubes should be specified.
SA 213 T9 vs ASTM A335 P9 – Key Differences
Both ASTM A213 T9 and ASTM A335 P9 use the same 9Cr-1Mo (UNS K90941) ferritic alloy chemistry. The key difference is their application and form:
Feature |
ASTM A213 T9 (SA 213 T9) |
ASTM A335 P9 |
Product Form | Seamless Tubes | Seamless Pipes |
Governing Standard | ASTM A213 / ASME SA 213 | ASTM A335 |
Primary Use | Boilers, heat exchangers, superheaters (heat transfer) | High-temperature pipework systems (fluid transport) |
Typical OD Range | 6 mm – 101.6 mm (thin-walled for heat transfer) | Larger diameters, thicker walls |
Wall Design | Thinner walls optimized for efficient heat transfer | Thicker walls for pressure fluid transport |
Chemistry (9Cr-1Mo) | Identical – UNS K90941 | |
If you need the pipe equivalent of T9 for connecting pipework, see our ASTM A335 P9 Pipes.
Types and Forms of ASTM A213 T9 Tubes
USA Piping Solution provides ASTM A213 T9 Tubes tailored to common fabrication needs:
Form |
Description |
Straight Lengths |
Standard delivery form in various lengths. Used for furnace coils, heat exchanger banks, boiler straight runs, and connecting lines. |
U-Bends |
Precisely bent to your required radius for U-tube heat exchangers, with optional stress-relieving of the bent portion for cyclic service. |
Conditioned for Service |
Supplied in fully annealed or normalized-and-tempered condition per ASTM A213, ensuring optimal microstructure for high-temperature performance. |
ASTM A213 T9 IBR Certified Tubes – Certifications & Testing
✔ ASTM A213 / ASME SA 213 ✔ IBR Certified (Indian Boiler Regulations) ✔ EN 10216-2 10CrMo9-10 ✔ PED Compliant (EU) ✔ EN 10204 Type 3.1 MTC ✔ NACE Consultation Available ✔ TPI (Lloyd's, DNV, TUV, ABS, SGS)
All ASTM A213 T9 / SA 213 T9 tubes are supplied with comprehensive EN 10204 Type 3.1 Mill Test Certificates (MTC) providing full traceability — chemical analysis, mechanical test results, and heat treatment records.
Test / Certification |
Details |
Hydrostatic Test | Per ASTM A213 — pressure tested to verify integrity |
PMI (Positive Material Identification) | Confirms alloy chemistry on each heat |
Ultrasonic Testing (UT) | NDT inspection for internal defect detection |
Hardness Test | Rockwell B scale — ≤ 85 HRB confirmed |
IBR Certification | Available for boiler components destined for India |
PED (Pressure Equipment Directive) | EU-compliant supply available |
Third-Party Inspection | Fully supported — Lloyd's, DNV, TUV, ABS, SGS |
Packaging & Delivery of SA 213 T9 Seamless Tubes
USA Piping Solution ensures safe, export-ready packaging of all ASTM A213 T9 / SA 213 T9 tubes for domestic and international shipments:
- Hexagonal bundles with steel strapping for standard straight lengths
- Wooden cases / crates for small diameter, thin-wall, or precision-drawn tubes
- Plastic end caps on each tube to protect bore and beveled ends
- VCI (Vapor Corrosion Inhibitor) film or oiled finish for corrosion protection during sea freight
- Clear labelling with heat number, grade, size, and MTC reference on each bundle
- Export-compliant documentation: Commercial invoice, packing list, country of origin certificate, MTC
We support FCA, FOB, CIF, and DAP delivery terms. Standard lead times are 2–4 weeks from stock; custom sizes typically 4–8 weeks. Contact us for express delivery options.
Why Choose USA Piping Solution as Your SA 213 T9 Tube Supplier?
At USA Pipings, we are committed to being a trusted ASTM A213 T9 Tubes supplier, delivering high-quality solutions for high-temperature and high-pressure industrial applications. Each ASTM A213 T9 alloy steel seamless tube we manufacture is subjected to stringent quality checks — including PMI analysis, hydrostatic testing, and ultrasonic inspection — to ensure full compliance with international standards and client specifications.
Advantage |
Details |
Comprehensive Stock | Wide range of OD, wall thickness, and custom dimensions ready for prompt dispatch |
Global Logistics | Export-ready documentation; supply to USA, Europe, Middle East, Southeast Asia |
Quality Assurance | EN 10204 Type 3.1 MTC; PMI, UT, hydrostatic, hardness testing on every lot |
IBR & PED Certified | Boiler-approved supply for India (IBR) and EU pressure equipment projects |
Technical Expertise | Decades of chrome moly alloy steel metallurgical experience |
Competitive Pricing | Request current T9 tube price list — volume discounts available |
Related Products
- ASTM A213 T5 Tubes
- ASTM A213 T11 Tubes
- ASTM A213 T22 Tubes
- ASTM A213 T91 Tubes
- ASTM A335 P9 Pipes
- ASTM A213 T23 Tubes
Request Your ASTM A213 T9 / SA 213 T9 Tubes Quote Today
Looking for a dependable source for high-quality ASTM A213 T9 seamless tubes? Get a competitive T9 tube price list, discuss custom sizes, or request IBR certification. Our team responds within 24 hours.
Get a Free QuoteFrequently Asked Questions – ASTM A213 T9 / SA 213 T9 Tubes
What is ASTM A213 T9 used for?
ASTM A213 T9 tubes are used in boilers, superheaters, and heat exchangers in high-temperature and high-pressure environments such as power plants, refineries, and petrochemical facilities due to their excellent thermal and mechanical strength.
What is the chemical composition of T9 tubes?
T9 tubes are composed of chromium (8.00–10.00%), molybdenum (0.90–1.10%), carbon (max 0.15%), manganese (0.30–0.60%), and small amounts of phosphorus (max 0.025%) and sulfur (max 0.025%), giving them superior heat resistance and structural integrity. This alloy is commonly referred to as 9Cr-1Mo.
What is the UNS number for ASTM A213 T9?
The UNS designation for ASTM A213 T9 is UNS K90941. This grade is also referred to as 9Cr-1Mo or chrome moly T9.
What are the mechanical properties of ASTM A213 T9?
ASTM A213 T9 tubes offer a minimum tensile strength of 415 MPa (60,200 psi), yield strength of 205 MPa (29,700 psi), elongation of at least 30%, and a maximum hardness of 85 HRB, making them suitable for high-pressure, high-heat applications.
What is the difference between ASTM A213 T9 and ASTM A335 P9?
Both ASTM A213 T9 and ASTM A335 P9 use the same 9Cr-1Mo (UNS K90941) ferritic alloy chemistry. The key difference is their application: ASTM A213 T9 covers seamless tubes intended for boilers, heat exchangers, and superheaters, while ASTM A335 P9 covers seamless pipes used in high-temperature pipework systems. Tubes are generally smaller in OD (up to ~101.6 mm) and have thinner walls for heat transfer efficiency, whereas pipes are designed for fluid transport with thicker walls and larger diameters.
What is the difference between ASTM A213 T9 and T91 tubes?
ASTM A213 T9 (9Cr-1Mo) and T91 (9Cr-1Mo-V) share similar chromium content, but T91 includes vanadium, niobium, and nitrogen additions that significantly increase its tensile strength (≥585 MPa vs ≥415 MPa) and allow it to operate at higher temperatures (up to ~620°C vs ~550°C for T9). T9 is more cost-effective for moderate high-temperature service, while T91 is specified for ultra-supercritical boilers and more extreme applications.
What is the operating temperature range for SA 213 T9 boiler tubes?
ASTM A213 T9 / SA 213 T9 boiler tubes are suitable for service up to approximately 550°C (1020°F). Above this temperature, grades like T91 or T92 are typically specified. T9 offers a significant improvement over carbon steel and lower chrome-moly grades (T11, T22) in the intermediate high-temperature range.
Are ASTM A213 T9 tubes IBR certified?
Yes. USA Piping Solution can supply IBR-certified ASTM A213 T9 tubes for boiler components used in India under the Indian Boiler Regulations. IBR certification is available on request — please specify at the time of enquiry.
What is the equivalent of ASTM A213 T9 in EN/DIN standards?
The EN equivalent of ASTM A213 T9 is EN 10216-2 grade 10CrMo9-10. The DIN equivalent is DIN 17175, and the JIS equivalent is JIS STBA26. All share the same 9Cr-1Mo chemistry with UNS K90941.
What does 9Cr-1Mo mean in T9 tubes?
“9Cr-1Mo” refers to the alloy composition of ASTM A213 T9 tubes: approximately 9% chromium (Cr) and 1% molybdenum (Mo). Chromium provides oxidation resistance and corrosion protection at elevated temperatures, while molybdenum enhances high-temperature strength, hardness, and creep resistance.
Can ASTM A213 T9 tubes be used in sour service / H2S environments?
ASTM A213 T9 tubes are primarily engineered for high-temperature oxidation and creep resistance, not for sour service. For environments with significant H2S (hydrogen sulfide) content, NACE MR0175 / ISO 15156 compliance should be evaluated. While T9 may be used in some refinery environments that involve sulfur compounds, it is not T9’s primary design intent. Please consult with our technical team to discuss your specific process conditions.
What sizes and finishes are available for T9 tubes?
T9 tubes are available in outer diameters from 6 mm to 101.6 mm and wall thicknesses from 1 mm to 12 mm. Finishes include hot-finished, cold-drawn, annealed, pickled, or oiled, with plain, beveled, or threaded ends on request. Custom lengths up to 12 meters are available.