Steel 7CrMoVTiB10-10
EN 7CrMoVTiB10-10 · ASTM A213 T24
7CrMoVTiB10-10 (1.7378, A213 T24) is a 2.25Cr-1Mo steel microalloyed with vanadium, titanium and boron for higher creep strength than plain P22, supplied mainly as boiler tube in N+T, Q+T, annealed and CD+NT conditions.
Reference datasheet — 7CrMoVTiB10-10 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the N+T condition
7CrMoVTiB10-10 tempers and conditions
7CrMoVTiB10-10 is supplied in 4 conditions, soft to hard. N+T is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Softened condition for heavy machining, cold bending or intermediate processing; must be re-normalized/tempered before service. | 340 | 520 | 28 | 165 HB | 8.2 % IACS |
N+TDefault Normalized and tempered | Standard delivery condition for T24 / 7CrMoVTiB10-10 seamless boiler tubes and headers. | 520 | 640 | 23 | 205 HB | — |
Cold drawn tube, then normalized and tempered | Cold-drawn small-diameter waterwall tubing given the full N&T cycle for close dimensional tolerance with code-compliant properties. | 530 | 650 | 22 | 17 HRC | 7.8 % IACS |
Quenched and tempered | Used for heavy-wall headers and forgings where a fully bainitic through-section structure and the upper strength band are wanted. | 570 | 700 | 20 | 225 HB | — |
What is 7CrMoVTiB10-10?
7CrMoVTiB10-10 (1.7378, A213 T24) is a 2.25Cr-1Mo steel microalloyed with vanadium, titanium and boron for higher creep strength than plain P22, supplied mainly as boiler tube in N+T, Q+T, annealed and CD+NT conditions. Engineers use it in supercritical boiler waterwalls, where 520 MPa yield, 640 MPa tensile and 23 % elongation at about 205 HB allow thinner tube walls up to roughly 560 °C. Weldability is moderate (score 55): HAZ hardness must be controlled and PWHT is normally required unless a qualified procedure says otherwise. It has no ambient corrosion resistance; 10CrMo9-10 is the conventional alternative where creep strength allows. 7CrMoVTiB10-10 has a density of 7.84 g/cm³ (0.283 lb/in³), lighter than 78% of steel grades. It melts at 1,450°C (2,642 °F). 7CrMoVTiB10-10 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 67% of steel grades. Elongation at break is 23% and the elastic modulus is 213 GPa (30.9 Msi).
What is 7CrMoVTiB10-10 used for?
- Supercritical boiler tubes
- Waterwall and membrane wall panels
- Superheater tubing
- Boiler headers
- Once-through steam generator tubing
- Economizer tube banks
Advantages
- High service temperature — 560°C (1,040 °F), better than 96% of steel grades
- Good corrosion resistance — 22/100, better than 90% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
7CrMoVTiB10-10 properties
Typical room-temperature values for 7CrMoVTiB10-10-N+T; bars are the position among steel grades.
Physical3
7CrMoVTiB10-10 has a density of 7.84 g/cm³ (0.283 lb/in³), lighter than 78% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical15
7CrMoVTiB10-10 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 67% of steel grades. Elongation at break is 23% and the elastic modulus is 213 GPa (30.9 Msi).
Thermal6
7CrMoVTiB10-10 is rated for continuous service to 560°C (1,040 °F). It conducts heat at 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 73% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical2
7CrMoVTiB10-10 has an electrical resistivity of 2.2×10⁻⁷ Ω·m.
Chemical & Environmental3
Corrosion resistance is poor (22/100), better than 90% of steel grades.
Sustainability4
Producing a kilogram of 7CrMoVTiB10-10 takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability7
7CrMoVTiB10-10's machinability is fair (45/100, worse than 65% of steel grades); weldability good (55/100); formability fair (50/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. 7CrMoVTiB10-10 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 7CrMoVTiB10-10
Is 7CrMoVTiB10-10 easy to machine?
Machines like normalized 2.25Cr-1Mo at ~55 % of 1212; use rigid setups, carbide inserts and moderate speeds — bainitic structure work-hardens the cut surface.
Can 7CrMoVTiB10-10 be welded?
GTAW root/SMAW-SAW fill with matching T24 consumables; keep hydrogen low, preheat 150–250 °C, and apply PWHT ~730–750 °C unless a qualified no-PWHT procedure exists — HAZ hardness above ~350 HV invites hydrogen and stress-corrosion cracking in service.
Can 7CrMoVTiB10-10 be formed, bent or molded?
Hot form 900–1050 °C followed by re-normalizing and tempering; cold bending of tube is possible at generous radii but demands a restoration heat treatment for code service.
7CrMoVTiB10-10 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow carbon for weldability | 0.05 – 0.1 | 0.07 |
| Si | 0.15 – 0.45 | 0.3 |
| Mn | 0.3 – 0.7 | 0.5 |
| P | ≤ 0.02 | |
| S | ≤ 0.01 | |
| Cr | 2.2 – 2.6 | 2.4 |
| Mo | 0.9 – 1.1 | 1 |
| VMX carbonitride strengthening | 0.2 – 0.3 | 0.25 |
| Tities up N, protects B | 0.05 – 0.1 | 0.07 |
| Bhardenability / creep | 0 – 0.01 | 0 |
| N | ≤ 0.01 | |
| Almax, total | ≤ 0.02 | |
| Nbresidual, max | ≤ 0.05 | |
| Fe | balance |
What surface finishes work on 7CrMoVTiB10-10?
Supplied descaled/pickled or shot-blasted; not corrosion resistant at ambient — protect stored tube with oil or coating and use aluminising/coatings for fireside protection.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 7CrMoVTiB10-10 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- A213 T24
- EN / DIN / Werkstoff-Nr.
- 1.7378
- Also called
- T24
How much does 7CrMoVTiB10-10 cost?
7CrMoVTiB10-10 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
7CrMoVTiB10-10 — frequently asked
What is 7CrMoVTiB10-10 used for?
7CrMoVTiB10-10 is typically used for supercritical boiler tubes, waterwall and membrane wall panels, superheater tubing, boiler headers, once-through steam generator tubing and economizer tube banks. In short: high creep strength P22 variant; supercritical waterwall tube grade; thinner walls than P22.
What is the yield strength of 7CrMoVTiB10-10?
7CrMoVTiB10-10 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 67% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is 7CrMoVTiB10-10 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machines like normalized 2.25Cr-1Mo at ~55 % of 1212; use rigid setups, carbide inserts and moderate speeds — bainitic structure work-hardens the cut surface.
Can 7CrMoVTiB10-10 be welded?
Yes — weldability is rated good (55/100). GTAW root/SMAW-SAW fill with matching T24 consumables; keep hydrogen low, preheat 150–250 °C, and apply PWHT ~730–750 °C unless a qualified no-PWHT procedure exists — HAZ hardness above ~350 HV invites hydrogen and stress-corrosion cracking in service.
What surface finishes work on 7CrMoVTiB10-10?
Supplied descaled/pickled or shot-blasted; not corrosion resistant at ambient — protect stored tube with oil or coating and use aluminising/coatings for fireside protection.
Can 7CrMoVTiB10-10 be formed, bent or molded?
Hot form 900–1050 °C followed by re-normalizing and tempering; cold bending of tube is possible at generous radii but demands a restoration heat treatment for code service.
What is the maximum service temperature of 7CrMoVTiB10-10?
7CrMoVTiB10-10 is rated for continuous use to about 560°C (1,040 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 7CrMoVTiB10-10 N+T and 7CrMoVTiB10-10-A?
N+T is the default condition — standard delivery condition for T24 / 7CrMoVTiB10-10 seamless boiler tubes and headers. A: softened condition for heavy machining, cold bending or intermediate processing; must be re-normalized/tempered before service. Yield strength is 520 MPa in N+T versus 340 MPa in A.
How much does 7CrMoVTiB10-10 cost?
7CrMoVTiB10-10 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10216-2 Seamless steel tubes for pressure purposes — alloy steel tubes with specified elevated temperature properties — CEN (2020)
- ASTM A213/A213M Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes (Grade T24) — ASTM International (2022)
- VdTÜV-Werkstoffblatt 533 — 7CrMoVTiB10-10 (1.7378) — VdTÜV (2015)
- Seamless boiler tube grade T24 / 7CrMoVTiB10-10 data sheet — Vallourec / Mannesmann (2018)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (Cr-Mo steels) — ASM International (1990)
- ASME BPVC Section II Part D — physical property tables, 2.25Cr-1Mo group — ASME (2021)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.