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Solitaire Overseas is a manufacturer, supplier, and stockist of SA213 T23 alloy steel tubes and ASTM A213 T23 chrome moly seamless tubes in Mumbai, India. We supply SA 213 T23 tubing in seamless, EFW, and welded forms across sizes ½" OD to 5" OD, in compliance with ASTM, ASME, and international quality standards. With stock ready for domestic and export dispatch and a dedicated quality team, we serve power plants, refineries, petrochemical plants and boiler manufacturers across 50+ countries.
Call: +91-9619103479 | Email: vishal@solitaire-overseas.com | Quote within 24 hours
ASME SA213 T23 tubes (also specified as ASTM A213 T23) are ferritic alloy steel seamless tubes designed specifically for high-temperature, high-pressure boiler and heat exchanger service. The designation 'T23' refers to a 2¼Cr–1.6W–0.25V alloy steel commonly known as chrome moly (Cr-Mo) tubing that represents a significant advancement over the T22 grade.
The SA213 t23 grade contains carefully controlled additions of Chromium (Cr), Molybdenum (Mo), Tungsten (W), Vanadium (V), Niobium (Nb) and Boron (B), giving it superior creep resistance and long-term strength at elevated temperatures. These tubes are also referred to as:
Understanding T23 material composition is essential for procurement, welding procedure qualification, and code compliance. The complete 13-element chemical composition of ASTM A213 T23 / ASME SA213 T23:
| Element | Symbol | Composition (%) |
|---|---|---|
| Carbon | C | 0.04 – 0.10 |
| Manganese | Mn | 0.10 – 0.60 |
| Phosphorus | P | 0.030 max |
| Sulfur | S | 0.010 max |
| Silicon | Si | 0.50 max |
| Chromium | Cr | 1.90 – 2.60 |
| Molybdenum | Mo | 0.05 – 0.30 |
| Vanadium | V | 0.20 – 0.30 |
| Niobium (Columbium) | Nb | 0.02 – 0.08 |
| Boron | B | 0.0005 – 0.006 |
| Nitrogen | N | 0.030 max |
| Aluminum | Al | 0.030 max |
| Tungsten | W | 1.45 – 1.75 |
UNS Designation: K41650 | Equivalent Pipe Grade: ASTM A335 P23 / ASME SA335 P23
| Property | Value |
|---|---|
| Tensile Strength (minimum) | 510 MPa (74 ksi) |
| Yield Strength (minimum) | 400 MPa (58 ksi) |
| Elongation (minimum) | 20% |
| Hardness (maximum) | 220 HB |
| Density | ~7.85 g/cm³ |
| Continuous Service Temperature | Up to ~625°C (1,157°F) |
| Avoid Temperature Range | 540°C–820°C (1,000°F–1,600°F) — ductility risk |
For material selection guidance, read our comparison of alloy steel vs stainless steel for high-temperature service.
| Property | SA213 T22 (2¼Cr-1Mo) | SA213 T23 (2¼Cr-1.6W-V) |
|---|---|---|
| Chromium Content | 1.90 – 2.60% | 1.90 – 2.60% |
| Molybdenum | 0.87 – 1.13% | 0.05 – 0.30% |
| Tungsten | None | 1.45 – 1.75% ★ |
| Vanadium | None | 0.20 – 0.30% ★ |
| Tensile Strength (min) | 415 MPa | 510 MPa ★ |
| Yield Strength (min) | 205 MPa | 400 MPa ★ |
| Allowable Stress at 600°C | Lower | 50–70% higher ★ |
| PWHT Required? | Yes (mandatory) | Not mandatory in many codes ★ |
| Max Service Temperature | ~565°C | ~625°C ★ |
| Weldability | Good | Excellent ★ |
| Typical Application | Conventional boilers | Advanced supercritical plants ★ |
★ = T23 advantage over T22
Specify ASTM A213 T23 over T22 when:
See our alloy steel boiler tubes for full range.
| Parameter | Specification |
|---|---|
| Standard | ASTM A213 / ASME SA213 |
| Tube Size (Seamless) | ½" OD to 5" OD; custom diameters available |
| Outer Diameter Range | 6.35 mm to 101.60 mm (seamless); up to 2,500 mm |
| Wall Thickness | 3 mm to 15 mm (schedule range); 1–200 mm custom |
| Schedule | SCH 20, 30, 40, STD, 60, 80, XS, 120, 140, 160, XXS |
| Type | Seamless / EFW / Fabricated |
| Form | Round, Square, Rectangular, Hydraulic |
| Length | Single Random, Double Random, Cut Length (max 16,000 mm; U-bend available) |
| End Finish | Plain End, Beveled End, Threaded |
| Equivalent Pipe Grade | ASTM A335 P23 / ASME SA335 P23 |
| Outside Diameter | OD Tolerance (mm) |
|---|---|
| OD ≤ 101.6 mm | +0.4 / −0.8 |
| 101.6 < OD ≤ 190.5 mm | +0.4 / −1.2 |
| 190.5 < OD ≤ 228.6 mm | +0.4 / −1.6 |
| Outside Diameter | OD Tolerance (mm) |
|---|---|
| OD < 25.4 mm | ± 0.10 |
| 25.4 ≤ OD ≤ 38.1 mm | ± 0.15 |
| 38.1 < OD < 50.8 mm | ± 0.20 |
| 50.8 ≤ OD < 63.5 mm | ± 0.25 |
| 63.5 ≤ OD < 76.2 mm | ± 0.30 |
| 76.2 ≤ OD ≤ 101.6 mm | ± 0.38 |
| OD Range | Wall Thickness | WT Tolerance |
|---|---|---|
| OD ≤ 101.6 mm | WT ≤ 2.4 mm | +40% / −0 |
| OD ≤ 101.6 mm | 2.4 < WT ≤ 3.8 mm | +35% / −0 |
| OD ≤ 101.6 mm | 3.8 < WT ≤ 4.6 mm | +33% / −0 |
| OD ≤ 101.6 mm | WT > 4.6 mm | +28% / −0 |
| OD > 101.6 mm | WT > 4.6 mm | +28% / −0 |
| Standard Body | Equivalent Specification |
|---|---|
| ASTM / ASME | ASTM A213 T23 / ASME SA213 T23 |
| European (EN) | EN 10216-2 (closest grade) |
| Russian (GOST) | GOST 550-75 |
| Equivalent Pipe | ASTM A335 P23 / ASME SA335 P23 |
| UNS Number | K41650 |
One of the most significant technical advantages of ASME SA213 T23 tubes over T22 is their welding behaviour. T22 requires mandatory PWHT after every weld — adding fabrication time, cost, and complexity, especially during field erection of boilers and HRSGs.
T23 tubes, by contrast, can often be used in the as-welded condition for certain thickness ranges and service conditions — particularly in water wall panel construction. The controlled boron content, combined with the low carbon specification (0.04–0.10% C), results in a weld heat-affected zone that retains adequate toughness without a mandatory post-weld anneal.
Note: Always confirm PWHT requirements against the applicable engineering code (ASME Section I, ASME B31.1, EN 13480, etc.) and welding procedure qualification. Solitaire Overseas can provide full MTRs and material certifications to support your WPS/PQR documentation.
Solitaire Overseas supplies full MTRs with every shipment — if you're unfamiliar with what these contain, our guide on how to read a mill test report for heat exchanger tubes walks through each field
Every batch of SA213 T23 / ASTM A213 T23 seamless tubes is subjected to rigorous quality inspection in compliance with ASTM A213 and ASME SA213 requirements:
SA213 T23 chrome moly heater tubes are engineered for the most demanding thermal and pressure service:
The primary application of T23 tubing is in advanced supercritical and ultra-supercritical fossil-fuelled power plants where steam temperatures exceed 600°C. Specific uses:
Used in combined-cycle power plant HRSGs where high-pressure steam generation at elevated temperatures demands superior creep resistance.
SA213 T23 tubes serve in process heaters, fired heaters, and heat exchangers in refinery service where process stream temperatures exceed T22 capability.
Petrochemical processing | Chemical reactors | Aerospace | Food processing | Paper & pulp | Pharmaceutical | Nuclear reactors | Pressure vessels
| Trust Signal | Detail |
|---|---|
| Quality Standard | ISO 9001 Quality Management System |
| Boiler Compliance | IBR (Indian Boiler Regulation) approved stock available |
| European Projects | PED (Pressure Equipment Directive) compliant supply |
| Traceability | Full heat/lot traceability with Mill Test Reports (MTRs) |
| Third-Party Inspection | BV, SGS, Intertek, DNV available on request |
| Global Reach | Export to 50+ countries; documentation, FORM-E, CO arranged |
| Response Time | Quote within 24 hours; stock confirmation same day |
| Industrial Client Base | Trusted by 100+ industrial clients worldwide |
Indicative price range: USD 300–3,600 per metric ton (FOB) depending on size and specification. Prices are subject to change without prior notice based on raw material markets.
Pricing depends on: OD and wall thickness | Quantity (kg or metric ton) | Delivery terms (ex-works Mumbai, CIF, FOB) | Origin (domestic vs. import)
Contact us for a firm price and stock confirmation: +91-9619103479 | vishal@solitaire-overseas.com | Response within 24 hours
ASTM A213 T23 (UNS K41650) contains: Carbon 0.04–0.10%, Manganese 0.10–0.60%, Phosphorus 0.030% max, Sulfur 0.010% max, Silicon 0.50% max, Chromium 1.90–2.60%, Molybdenum 0.05–0.30%, Vanadium 0.20–0.30%, Niobium 0.02–0.08%, Boron 0.0005–0.006%, Nitrogen 0.030% max, Aluminum 0.030% max, and Tungsten 1.45–1.75%. Tungsten and Vanadium are the key elements distinguishing T23 from T22.
T23 contains Tungsten (1.45–1.75%) and Vanadium (0.20–0.30%) that T22 does not. T23 has significantly higher yield strength (400 MPa vs 205 MPa minimum) and a higher allowable stress at temperatures above 550°C. T23 can often be used without mandatory PWHT while T22 always requires it. T23 is preferred for advanced supercritical power plants.
Yes, in many applications. Controlled boron content and low carbon (0.04–0.10%) allow as-welded use for certain thickness ranges and service conditions, particularly in water wall panel fabrication. Always confirm against your applicable engineering code and WPS/PQR.
SA213 T23 tubes are rated for continuous service up to approximately 625°C (1,157°F). Avoid the range 540°C–820°C (1,000°F–1,600°F) due to ductility loss risk.
UNS designation: K41650. Equivalent pipe grade: ASTM A335 P23 / ASME SA335 P23. European equivalent: EN 10216-2.
Yes. Solitaire Overseas stocks IBR-approved SA213 T23 alloy steel boiler tubes for Indian boiler projects. Specify IBR approval at the time of enquiry.
We stock T23 seamless tubes from ½" OD (6.35 mm) to 5" OD (101.60 mm) in standard schedules. Larger diameters up to 2,500 mm OD are available on order. Custom cut lengths and U-bend configurations are also available.
All SA213 T23 tubes undergo: OES chemical analysis, mechanical testing (tensile, yield, hardness), 100% hydrostatic testing, dimensional inspection, and visual inspection per ASTM A213. UT, ECT, and TPI (BV, SGS, Intertek) available on request. Full MTRs provided with every shipment.
Grade | Standard | OD | Wall Thickness | Quantity | Delivery Country
Respond within 24 hours | 500+ clients worldwide | Full mill certification supplied
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