Steel 13CrMoV9-10 +A (Annealed)
Heat-treated state
EN 13CrMoV9-10
Pick for heavy rough machining or cold work before final quench-and-temper heat treatment.
Values for the +A condition
Other 13CrMoV9-10 tempers and conditions
13CrMoV9-10 is listed in 5 conditions; see the grade overview at 13CrMoV9-10.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+AThis page Annealed | Pick for heavy rough machining or cold work before final quench-and-temper heat treatment. | 330 | 560 | 24 | 170 HB | — |
Normalized and tempered | Pick for tubes, headers and thinner plate where creep strength at 500–570 °C matters more than peak room-temperature strength. | 440 | 620 | 21 | 14 HRC | — |
+QTDefault Quenched and tempered | Standard supply condition for heavy hydroprocessing reactor shells, forgings and thick plate needing high strength plus creep and hydrogen-attack resistance. | 500 | 680 | 20 | 18 HRC | 35 W/m·K |
Normalized | Intermediate mill condition for grain refinement before tempering; rarely used as a final service condition. | 520 | 750 | 16 | 22 HRC | 7.6 % IACS |
+QT | Pick when the vessel design needs the upper strength class (≈ SA-542 Type D Cl.4a) at some cost in toughness margin. | 600 | 760 | 18 | 23 HRC | — |
What is 13CrMoV9-10 +A?
13CrMoV9-10 +A is 13CrMoV9-10 heat treated to +A — pick for heavy rough machining or cold work before final quench-and-temper heat treatment. 13CrMoV9-10 +A has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 78% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi). 13CrMoV9-10 +A has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). +QT is the default condition FabDigit quotes; +A is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 180 MPa·√m (163.8 ksi·√in), better than 99% of steel grades
- High service temperature — 500°C (932 °F), better than 90% of steel grades
Limitations
- Low strength — 330 MPa (47.9 ksi), worse than 78% of steel grades
- Poor heat conductor — 35 W/m·K (20.2 BTU/hr·ft·°F), worse than 75% of steel grades
13CrMoV9-10 +A properties
Typical room-temperature values for 13CrMoV9-10 +A; 13 are specific to this condition. Other listed values are 13CrMoV9-10 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
13CrMoV9-10 +A has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
13CrMoV9-10 +A has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 78% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
13CrMoV9-10 +A is rated for continuous service to 500°C (932 °F). It conducts heat at 35 W/m·K (20.2 BTU/hr·ft·°F), worse than 75% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
13CrMoV9-10 +A conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (20/100), better than 87% of steel grades.
Sustainability4
Producing a kilogram of 13CrMoV9-10 +A takes about 32 MJ of energy and emits 2.3 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability8
13CrMoV9-10 +A's machinability is good (55/100, better than 62% of steel grades); weldability fair (50/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 13CrMoV9-10 +A
Is 13CrMoV9-10 easy to machine?
Machine in the annealed or as-tempered condition with rigid setups, coated carbide, moderate speed and heavy positive feed; the V-rich bainite work-hardens and abrades tooling faster than plain 4130/4140.
Can 13CrMoV9-10 be welded?
Weld with matching low-Si 2.25Cr-1Mo-V filler (e.g. E9018-G / B3V, SAW with basic flux), preheat/interpass 200–250 °C, strict hydrogen control, and mandatory PWHT at 690–720 °C; watch for reheat cracking in coarse HAZ and step-cooling embrittlement limits (J and X factors).
Can 13CrMoV9-10 be formed, bent or molded?
Hot form at 1050–900 °C and re-heat-treat afterwards; cold bending is limited by the high yield strength and should be followed by stress relief.
What surface finishes work on 13CrMoV9-10?
No anodizing; use shot blast plus high-temperature aluminum/silicone paint externally, or 347/309L stainless weld-overlay or explosion-clad lining for corrosive process sides.
13CrMoV9-10 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 |
|---|---|---|
| C | 0.11 – 0.15 | 0.13 |
| Sikept low to limit temper embrittlement | ≤ 0.1 | 0.06 |
| Mn | 0.3 – 0.6 | 0.5 |
| PJ-factor control for reactor steel | ≤ 0.02 | 0.01 |
| S | ≤ 0.01 | 0 |
| Cr | 2 – 2.5 | 2.25 |
| Mo | 0.9 – 1.1 | 1 |
| VMC carbide creep/HTHA strengthening | 0.25 – 0.35 | 0.3 |
| Nb | 0.02 – 0.07 | 0.03 |
| Ni | ≤ 0.25 | 0.15 |
| Cu | ≤ 0.2 | 0.08 |
| Ti | ≤ 0.03 | 0.01 |
| B | ≤ 0 | 5×10⁻⁴ |
| Fe | balance | — |
13CrMoV9-10 +A — frequently asked
What is 13CrMoV9-10 +A used for?
13CrMoV9-10 +A is typically used for boiler tubes, steam pipelines, turbine casings and power-plant flanges. In short: creep strength to 570 °C; weldable Cr-Mo-V pipe steel.
What is the yield strength of 13CrMoV9-10 +A?
13CrMoV9-10 +A has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 78% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 13CrMoV9-10 +A easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machine in the annealed or as-tempered condition with rigid setups, coated carbide, moderate speed and heavy positive feed; the V-rich bainite work-hardens and abrades tooling faster than plain 4130/4140.
Can 13CrMoV9-10 +A be welded?
With care — weldability is rated fair (50/100). Weld with matching low-Si 2.25Cr-1Mo-V filler (e.g. E9018-G / B3V, SAW with basic flux), preheat/interpass 200–250 °C, strict hydrogen control, and mandatory PWHT at 690–720 °C; watch for reheat cracking in coarse HAZ and step-cooling embrittlement limits (J and X factors).
What surface finishes work on 13CrMoV9-10 +A?
No anodizing; use shot blast plus high-temperature aluminum/silicone paint externally, or 347/309L stainless weld-overlay or explosion-clad lining for corrosive process sides.
Can 13CrMoV9-10 +A be formed, bent or molded?
Hot form at 1050–900 °C and re-heat-treat afterwards; cold bending is limited by the high yield strength and should be followed by stress relief.
What is the maximum service temperature of 13CrMoV9-10 +A?
13CrMoV9-10 +A is rated for continuous use to about 500°C (932 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10028-2 — Flat products of steels for pressure purposes, weldable fine grain and creep-resisting steels — CEN (2017)
- EN 10222-2 — Steel forgings for pressure purposes, ferritic and martensitic steels for elevated temperature — CEN (2017)
- ASME SA-542/SA-542M Type D (2.25Cr-1Mo-0.25V pressure vessel plate) — ASME (2021)
- ASME BPVC Section II Part D — physical and allowable stress data — ASME (2023)
- API RP 934-A — Materials and Fabrication of 2¼Cr-1Mo, 2¼Cr-1Mo-¼V Heavy Wall Pressure Vessels — API (2019)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- GB/T 5310 / GB 713 (12Cr1MoV, 12Cr2Mo1VR comparable Chinese grades) — SAC (2017)
- Mysteel / 1688 (2025)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.