Steel 14MoV6-3 +A (Annealed)
Heat-treated state
EN 14MoV6-3
Softest condition, ordered for heavy machining or cold forming before final normalize-and-temper.
Values for the +A condition
Other 14MoV6-3 tempers and conditions
14MoV6-3 is listed in 5 conditions; see the grade overview at 14MoV6-3.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+AThis page Annealed | Softest condition, ordered for heavy machining or cold forming before final normalize-and-temper. | 290 | 470 | 26 | 145 HB | 7.8 % IACS |
+NTDefault Normalized and tempered | Standard delivery condition for seamless boiler and steam-line tube/pipe; best combination of creep strength and toughness. | 380 | 540 | 22 | 165 HB | — |
Normalized | Used for plate and some hot-formed parts where a tempering step is added later or PWHT effectively tempers the part. | 400 | 580 | 20 | 180 HB | 7.5 % IACS |
Hot rolled | Mill hot-rolled bar or hollow supplied for re-forging or for parts that will be heat treated by the fabricator. | 400 | 600 | 19 | 190 HB | 7.5 % IACS |
Quenched and tempered | Chosen for thick flanges, valve bodies and header forgings needing uniform through-thickness properties. | 420 | 580 | 21 | 180 HB | 7.5 % IACS |
What is 14MoV6-3 +A?
14MoV6-3 +A is 14MoV6-3 heat treated to +A — softest condition, ordered for heavy machining or cold forming before final normalize-and-temper. 14MoV6-3 +A has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 88% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi). 14MoV6-3 +A has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F). +NT is the default condition FabDigit quotes; +A is available on request or by drawing note.
Advantages
- High service temperature — 500°C (932 °F), better than 90% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Ductile — tolerates forming and impact — 26%, better than 82% of steel grades
Limitations
- Low strength — 290 MPa (42.1 ksi), worse than 88% of steel grades
14MoV6-3 +A properties
Typical room-temperature values for 14MoV6-3 +A; 22 are specific to this condition. Other listed values are 14MoV6-3 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
14MoV6-3 +A has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical15
14MoV6-3 +A has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 88% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
14MoV6-3 +A is rated for continuous service to 500°C (932 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
14MoV6-3 +A conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of 14MoV6-3 +A takes about 30 MJ of energy and emits 2.2 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 30%.
Manufacturability7
14MoV6-3 +A's machinability is good (58/100, better than 75% of steel grades); weldability good (60/100); formability good (60/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 14MoV6-3 +A
Is 14MoV6-3 easy to machine?
Machines like a 175 HB low-alloy steel — carbide inserts, moderate speeds, rigid setup; the V-carbides make it slightly more abrasive than 16Mo3.
Can 14MoV6-3 be welded?
Weldable by TIG/SMAW/SAW with matching CrMoV filler; preheat 200–300 °C, control interpass, and PWHT at 700–750 °C to restore toughness and creep life.
Can 14MoV6-3 be formed, bent or molded?
Hot bend/forge at 1050–850 °C followed by re-normalizing and tempering; cold bending is limited and needs subsequent stress relief.
What surface finishes work on 14MoV6-3?
No anodizing; use pickling + phosphating, aluminizing or silicone/aluminium high-temperature paint, and insulate for steam service.
14MoV6-3 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 | 0.1 – 0.18 | 0.14 |
| Si | 0.15 – 0.35 | 0.25 |
| Mn | 0.4 – 0.7 | 0.55 |
| P | ≤ 0.03 | — |
| S | ≤ 0.02 | — |
| Cr | 0.3 – 0.6 | 0.45 |
| Mo | 0.5 – 0.7 | 0.6 |
| V | 0.22 – 0.32 | 0.27 |
| Niresidual max | ≤ 0.3 | — |
| Altotal Al, max | ≤ 0.02 | — |
| Fe | balance | — |
14MoV6-3 +A — frequently asked
What is 14MoV6-3 +A used for?
14MoV6-3 +A is typically used for boiler tubes and headers, steam piping, high-temperature flanges and power generation components. In short: most weldable CrMoV creep steel; service to 560 °C; lean-alloy pipe steel.
What is the yield strength of 14MoV6-3 +A?
14MoV6-3 +A has a typical yield strength of 290 MPa (42.1 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 88% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 14MoV6-3 +A easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Machines like a 175 HB low-alloy steel — carbide inserts, moderate speeds, rigid setup; the V-carbides make it slightly more abrasive than 16Mo3.
Can 14MoV6-3 +A be welded?
Yes — weldability is rated good (60/100). Weldable by TIG/SMAW/SAW with matching CrMoV filler; preheat 200–300 °C, control interpass, and PWHT at 700–750 °C to restore toughness and creep life.
What surface finishes work on 14MoV6-3 +A?
No anodizing; use pickling + phosphating, aluminizing or silicone/aluminium high-temperature paint, and insulate for steam service.
Can 14MoV6-3 +A be formed, bent or molded?
Hot bend/forge at 1050–850 °C followed by re-normalizing and tempering; cold bending is limited and needs subsequent stress relief.
What is the maximum service temperature of 14MoV6-3 +A?
14MoV6-3 +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 10216-2 — Seamless steel tubes for pressure purposes, non-alloy and alloy steels with specified elevated temperature properties — CEN (2020)
- DIN 17175 — Seamless tubes of heat-resistant steels (14MoV6 3) — DIN (1979)
- EN 10222-2 — Steel forgings for pressure purposes: ferritic and martensitic steels with elevated temperature properties — CEN (2017)
- Stahlschlüssel / Key to Steel — Verlag Stahlschlüssel Wegst (2019)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
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.