Steel 12CrMoV12-10
EN 12CrMoV12-10
12CrMoV12-10 (1.7767) is a creep-resisting chromium-molybdenum-vanadium low-alloy steel from the EN 10083/10250 engineering-steel family, strengthened by V and Mo carbides for sustained load at temperature.
Reference datasheet — 12CrMoV12-10 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 +QT condition
12CrMoV12-10 tempers and conditions
12CrMoV12-10 is supplied in 5 conditions, soft to hard. +QT is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest supply condition for heavy machining or forming of forgings before final quench-and-temper. | 350 | 570 | 24 | 175 HB | — |
Normalized and tempered | Choose for very heavy sections or where quenching is impractical; slightly lower strength and toughness than +QT but full creep capability. | 430 | 620 | 20 | 14 HRC | — |
+QT + simulated post-weld heat treatment | Ordered for reactor shells where the mill must guarantee properties after the fabricator's full PWHT cycle (e.g. 690–710 °C, long hold) plus step-cooling embrittlement test. | 460 | 630 | 21 | 195 HB | — |
+QTDefault Quenched and tempered | Standard supply condition for hydroprocessing reactor plate, forgings and pipe — best balance of creep strength, toughness and HTHA resistance. | 500 | 670 | 20 | 20 HRC | — |
+QT high-strength class | Lower tempering temperature for higher room-temperature strength in thinner shells; slightly reduced toughness margin and PWHT latitude. | 560 | 730 | 18 | 22 HRC | — |
What is 12CrMoV12-10?
12CrMoV12-10 (1.7767) is a creep-resisting chromium-molybdenum-vanadium low-alloy steel from the EN 10083/10250 engineering-steel family, strengthened by V and Mo carbides for sustained load at temperature. Engineers specify it for high-temperature, high-pressure service in power generation and petrochemical plants, normally as forgings, heavy bar and rotor blanks in +A, +NT, +QT, +QT-HS or +QT+SPWHT condition; default properties are 500 MPa yield, 670 MPa tensile, 20 % elongation and about 205 HB (20 HRC) with a 540 °C maximum service temperature. Limits are low corrosion resistance (score 25), only moderate weldability (45) requiring preheat and PWHT, and machinability (45) reduced by abrasive V-carbides. Where creep strength above ~500 °C is not needed, 2.25Cr-1Mo (10CrMo9-10) is the simpler and cheaper choice. 12CrMoV12-10 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). 12CrMoV12-10 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 670 MPa (97.2 ksi) — stronger than 63% of steel grades. Elongation at break is 20% and the elastic modulus is 210 GPa (30.5 Msi).
What is 12CrMoV12-10 used for?
- Steam turbine rotors
- High-pressure boiler components
- Petrochemical pressure vessels
- High-temperature bolting
Advantages
- Tough — resists crack growth — 180 MPa·√m (163.8 ksi·√in), better than 99% of steel grades
- High service temperature — 540°C (1,004 °F), better than 93% of steel grades
- Good corrosion resistance — 25/100, better than 92% of steel grades
Limitations
- Low electrical conductivity — 5 % IACS, worse than 82% of steel grades
12CrMoV12-10 properties
Typical room-temperature values for 12CrMoV12-10-+QT; bars are the position among steel grades.
Physical3
12CrMoV12-10 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).
Mechanical17
12CrMoV12-10 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 670 MPa (97.2 ksi) — stronger than 63% of steel grades. Elongation at break is 20% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
12CrMoV12-10 is rated for continuous service to 540°C (1,004 °F). It conducts heat at 38 W/m·K (22 BTU/hr·ft·°F), worse than 69% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
12CrMoV12-10 conducts electricity at 5 % IACS, worse than 82% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (25/100), better than 92% of steel grades.
Sustainability4
Producing a kilogram of 12CrMoV12-10 takes about 32 MJ of energy and emits 2.2 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability7
12CrMoV12-10's machinability is fair (45/100, worse than 65% of steel grades); weldability fair (45/100); formability fair (40/100).
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. 12CrMoV12-10 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 12CrMoV12-10
Is 12CrMoV12-10 easy to machine?
Machines like a 200 HB Q&T Cr-Mo steel — rigid setups, carbide inserts at 80–140 m/min, positive rake and generous coolant; abrasive V-carbides shorten tool life versus plain 2.25Cr-1Mo.
Can 12CrMoV12-10 be welded?
SAW/SMAW/GTAW with matching 3Cr-1Mo-V (e.g. B23V-type) consumables, preheat/interpass 200–250 °C, strict low-hydrogen practice, and PWHT ~690–720 °C; step-cooling and J-factor/X-bar limits are normally specified.
Can 12CrMoV12-10 be formed, bent or molded?
Hot form at 950–1150 °C followed by full re-austenitizing, quench and temper; cold forming limited to gentle rolling of thin sections because of high yield strength and section thickness.
12CrMoV12-10 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 | 0.1 – 0.15 | 0.13 |
| Sikept low for temper-embrittlement and HTHA resistance | ≤ 0.1 | 0.06 |
| Mn | 0.3 – 0.6 | 0.45 |
| PJ-factor / X-bar restrictions usually apply | ≤ 0.01 | 0.01 |
| S | ≤ 0.01 | 0 |
| Cr | 2.75 – 3.25 | 3 |
| Mo | 0.9 – 1.1 | 1 |
| Vfine V carbides give creep and HTHA resistance | 0.2 – 0.3 | 0.25 |
| Ni | ≤ 0.25 | 0.1 |
| Cu | ≤ 0.25 | 0.1 |
| TiTi-B variant; Nb (Cb) 0.015–0.070 in the A832 Gr.21V variant | 0.02 – 0.04 | 0.03 |
| B | 5×10⁻⁴ – 0 | 0 |
| Al | ≤ 0.02 | 0.01 |
| Fe | balance |
What surface finishes work on 12CrMoV12-10?
No anodizing; external surfaces are shot-blasted and painted or aluminized, while process surfaces are typically weld-overlaid with 309L/347 stainless.
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 12CrMoV12-10 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.7767
How much does 12CrMoV12-10 cost?
12CrMoV12-10 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.
12CrMoV12-10 — frequently asked
What is 12CrMoV12-10 used for?
12CrMoV12-10 is typically used for steam turbine rotors, high-pressure boiler components, petrochemical pressure vessels and high-temperature bolting. In short: creep-resisting Cr-Mo-V forging steel; service to 540 °C; strict preheat and PWHT.
What is the yield strength of 12CrMoV12-10?
12CrMoV12-10 has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 670 MPa (97.2 ksi) — stronger than 63% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 12CrMoV12-10 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machines like a 200 HB Q&T Cr-Mo steel — rigid setups, carbide inserts at 80–140 m/min, positive rake and generous coolant; abrasive V-carbides shorten tool life versus plain 2.25Cr-1Mo.
Can 12CrMoV12-10 be welded?
With care — weldability is rated fair (45/100). SAW/SMAW/GTAW with matching 3Cr-1Mo-V (e.g. B23V-type) consumables, preheat/interpass 200–250 °C, strict low-hydrogen practice, and PWHT ~690–720 °C; step-cooling and J-factor/X-bar limits are normally specified.
What surface finishes work on 12CrMoV12-10?
No anodizing; external surfaces are shot-blasted and painted or aluminized, while process surfaces are typically weld-overlaid with 309L/347 stainless.
Can 12CrMoV12-10 be formed, bent or molded?
Hot form at 950–1150 °C followed by full re-austenitizing, quench and temper; cold forming limited to gentle rolling of thin sections because of high yield strength and section thickness.
What is the maximum service temperature of 12CrMoV12-10?
12CrMoV12-10 is rated for continuous use to about 540°C (1,004 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 12CrMoV12-10 cost?
12CrMoV12-10 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 10028-2 — Flat products for pressure purposes, Part 2: steels with specified elevated-temperature properties — CEN (2017)
- ASTM A542/A542M — Pressure Vessel Plates, Alloy Steel, Quenched and Tempered, Cr-Mo and Cr-Mo-V — ASTM International (2019)
- ASTM A832/A832M — Pressure Vessel Plates, Alloy Steel, Cr-Mo-V (Grade 21V) — ASTM International (2019)
- API RP 934-A — Materials and Fabrication of 2¼Cr-1Mo, 2¼Cr-1Mo-¼V, 3Cr-1Mo and 3Cr-1Mo-¼V Steel Heavy Wall Pressure Vessels — American Petroleum Institute (2019)
- ASME BPVC Section II Part D — physical and allowable stress data for 3Cr-1Mo steels — ASME (2023)
- Heavy plate for hydroprocessing reactors, 3Cr-1Mo-0.25V grades — Dillinger / JSW Steel heavy-plate datasheets (2022)
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.