X20CrMoV12-1 (1.4922) Open-Die Forgings: Technical Data Sheet
Chemical composition, +NT and +QT mechanical properties, heat treatment, grade equivalents and available forged product forms, with custom forging from Jiangyin Jiangnan Metal Co., Ltd.
Overview
X20CrMoV12-1 is a 12 % chromium martensitic creep-resisting steel, material number 1.4922. Current EN standards designate it X20CrMoV11-1 and specify it mainly in EN 10302. It contains 0.17-0.23 % C, 10.0-12.5 % Cr, 0.80-1.20 % Mo and 0.25-0.35 % V. Typical use is for components in continuous service at elevated temperature up to about 580-600 °C: steam turbine rotors and blades, boiler and superheater parts, high temperature valves and bolting.
In the normalised and tempered (+NT) condition it provides a tensile strength of 690-840 MPa with a minimum yield strength of 490 MPa. In the quenched and tempered (+QT) condition it provides 700-850 MPa tensile with 500 MPa minimum 0.2 % proof strength.
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. We manufacture X20CrMoV12-1 forgings to customer drawing: forged round, square, flat and hex bars, hollow bars and sleeves, seamless rolled rings, discs, blocks, shafts, valve bodies and bonnets. Enquiries: sales@steelforgepieces.com or +86 189 2135 9659.
Quick reference
- Grade designation
- X20CrMoV12-1
- Material number
- 1.4922
- Current EN name
- X20CrMoV11-1
- Steel type
- Martensitic creep-resisting
- Nominal chromium
- 10.0 - 12.5 %
- Max. service temp.
- approx. 580 - 600 °C
- Tensile strength (+QT)
- 700 - 850 MPa
- Yield strength (+QT)
- min. 500 MPa
- Delivery conditions
- +NT, +QT, annealed
- Certification
- EN 10204 3.1 / 3.2 MTC
Values are the standard requirements quoted below. The governing purchase specification always takes precedence.
Designations, standards and equivalent grades
X20CrMoV12-1 is the classical DIN designation for the 12 % Cr-Mo-V creep-resisting steel with material number 1.4922. Under the harmonised European system the same steel is listed as X20CrMoV11-1. Both names refer to material number 1.4922 and are used interchangeably in industry. It should not be confused with the closely related, slightly higher-carbon grade X22CrMoV12-1 (1.4923).
| System / country | Designation | Remarks |
|---|---|---|
| Material number (Werkstoff-Nr.) | 1.4922 | Primary identifier |
| EN (current) | X20CrMoV11-1 | EN 10302, EN 10216-2, EN 10088-1 |
| DIN (former) | X20CrMoV12-1, X20CrMoV12 1 | DIN 17175, DIN 17240 |
| Alternative spellings in trade | X20CrMoV121, X 20 CrMoV 12 1, X20CrMoV12.1 | Same steel |
| Other EN listings | X20CrMoNiV11-1, X20CrMoNi12-01 | Ni-bearing variants of the same family |
| Czech (CSN) | 17 115, CSN 422916 | Nearest equivalent |
| Poland (PN) | 20H11MNF, 20H12M1F | Nearest equivalent |
| Russia (GOST) | 20Kh11MNF, 20Kh12MNF | Nearest equivalent |
| Sweden (SS) | 2317 | Nearest equivalent |
| Closely related grade | X22CrMoV12-1 (1.4923) | Higher C, 11.0-12.5 % Cr, not identical |
Cross-references indicate the closest known equivalents only. Chemical and mechanical requirements differ between national standards. Confirm acceptability with the design authority before substituting a grade.
Product standards in which the grade appears
- EN 10302, creep-resisting steels, nickel and cobalt alloys
- EN 10216-2, seamless tubes for pressure purposes at elevated temperature
- EN 10222-2, steel forgings for pressure purposes, ferritic and martensitic steels
- EN 10088-1, list of stainless steels
- EN 10269, steels for fasteners with specified elevated-temperature properties
- DIN 17175 / DIN 17240, historic boiler tube and bolting specifications
Chemical composition of X20CrMoV12-1 (1.4922)
The composition below follows EN 10302:2008. Chromium provides oxidation and steam-corrosion resistance. Molybdenum raises the recrystallisation temperature and reduces temper embrittlement. Vanadium forms fine carbides that pin dislocations and deliver the creep strength for which the grade is specified.
| C | Si | Mn | P | S | Cr | Mo | Ni | V | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 0.17 - 0.23 | max 0.50 | 0.30 - 1.00 | max 0.025 | max 0.015 | 10.00 - 12.50 | 0.80 - 1.20 | 0.30 - 0.80 | 0.25 - 0.35 | Balance |
EN 10088-1:2005 applies tighter limits to some elements: Si max 0.40 %, Mn min 0.30 %, V min 0.20 %. We supply material to whichever limit set the order specifies and report the full ladle analysis on the EN 10204 3.1 certificate.
Mechanical properties at room temperature
Requirements depend on the delivery condition, either +NT (normalised and tempered) or +QT (quenched and tempered). Both are routinely supplied on forgings.
| Property | +NT (normalised and tempered) | +QT (quenched and tempered) |
|---|---|---|
| Rm, tensile strength | 690 - 840 MPa | 700 - 850 MPa |
| ReH / Rp0.2, yield strength, min. | 490 MPa | 500 MPa |
| A, elongation at fracture, longitudinal, min. | 17 % | 15 - 16 % |
| A, elongation at fracture, transverse, min. | 14 % | n/a |
| KV, impact energy at +20 °C, longitudinal, min. | 40 J | 27 - 39 J |
| KV, impact energy at +20 °C, transverse, min. | n/a | 27 J |
| Hardness, annealed condition | approx. 205 - 250 HBW | |
Minimum values for test pieces taken in the stated direction. Achievable values on heavy forgings depend on section size, forging ratio and test-piece location, all of which are agreed at order stage.
Proof strength at elevated temperature
The reason X20CrMoV12-1 is specified in place of a low-alloy Cr-Mo steel is its behaviour above 400 °C. Minimum 0.2 % proof strength values to EN 10216-2 are as follows.
| Temperature | 200 °C | 300 °C | 350 °C | 400 °C | 450 °C | 500 °C | 550 °C |
|---|---|---|---|---|---|---|---|
| Rp0.2 min., MPa | 430 | 390 | 380 | 360 | 330 | 290 | 250 |
For creep rupture strength and 1 % creep strain limits at 104 and 105 hours, refer to the DIN 17175 data sheets or the ECCC assessed data set for X20CrMoV11-1. Design allowables must be taken from the code of construction, not from indicative supplier data.
Physical properties
| Property | Value | Condition |
|---|---|---|
| Density | 7.70 g/cm³ | 20 °C |
| Modulus of elasticity | approx. 216 GPa | 20 °C |
| Mean coefficient of thermal expansion | approx. 10.8 x 10-6 K-1 | 20 - 100 °C |
| Mean coefficient of thermal expansion | approx. 11.8 x 10-6 K-1 | 20 - 400 °C |
| Thermal conductivity | approx. 24 W/(m·K) | 20 °C |
| Specific heat capacity | approx. 460 J/(kg·K) | 20 °C |
| Electrical resistivity | approx. 0.55 µΩ·m | 20 °C |
| Magnetic response | Ferromagnetic | All conditions |
Indicative values for design guidance. Where physical data enter a calculation, use the figures given in the applicable standard or a tested certificate.
Heat treatment and forging parameters
| Operation | Temperature | Notes |
|---|---|---|
| Hot forging | 1100 down to 850 °C | Finish above 850 °C, then slow controlled cooling |
| Annealing, soft annealing | 700 - 780 °C | Furnace cool, for machining and intermediate stages |
| Austenitising, hardening | 1020 - 1070 °C | Oil or air quench depending on section size |
| Tempering | 700 - 780 °C | Minimum 2 h soak, air cool. Some specifications narrow this to 700 - 760 °C. The tempering temperature sets the final strength level |
| Stress relieving | 30 - 50 °C below the final tempering temperature | After machining or welding |
| Welding preheat | 300 - 400 °C | Maintain interpass temperature, PWHT is mandatory |
Heavy sections require a soak time proportional to wall thickness and a preheat before quenching. We carry out normalising, quenching and tempering in-house on chart-recorded furnaces and supply the heat-treatment chart with the forging.
Machining and welding
X20CrMoV12-1 machines best in the annealed condition. In the hardened and tempered condition it behaves like a 12 % Cr martensitic steel and calls for rigid set-ups, sharp carbide tooling, reduced cutting speed and generous coolant.
The grade is weldable but air-hardening. A preheat of 300-400 °C, matching or 12 % Cr filler metal, control of interpass temperature and a post-weld heat treatment below the original tempering temperature are all required. Without PWHT the heat-affected zone stays hard and crack-sensitive.
Typical applications
X20CrMoV12-1 is specified where a component has to hold its strength and dimensional stability under steam or hot gas for tens of thousands of hours.
- Steam turbine rotors, wheels, blades and impellers
- Turbine gland seal rings, sealing and guide rings
- Boiler, superheater and reheater components
- High temperature valve bodies, bonnets, stems, spindles, seats and discs
- High temperature bolting, studs and fasteners
- Compressor rotors and casings
- Pressure-retaining forgings for power and petrochemical plant
- Piping components and forged fittings for elevated-temperature service
X20CrMoV12-1 forged products we manufacture
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory in Jiangyin, Jiangsu, in the centre of China's forging industry cluster. We produce X20CrMoV12-1 components to customer drawing or to standard. All parts are forged, heat treated and inspected in-house.
| Product form | Description |
|---|---|
| Forged bars | Round, square, rectangular, flat and hexagonal bars |
| Hollow bars and sleeves | Bored hollow bars, sleeves, bushes, bushings, barrels, cases, shells, cylinders, hubs, housings |
| Seamless rolled rings | Radially rolled rings, gland seal rings, sealing and guide rings |
| Discs, blocks and plates | Forged discs, disks, blocks and plates, rough or finish machined |
| Shafts and rotating parts | Rotor shafts, wheels, blades, impellers, stepped and flanged shafts |
| Valve components | Gate, check and control valve bodies, bonnets, stems, spindles, rods, seats and discs |
| Fasteners | Bolts, studs and threaded components for elevated-temperature bolting |
| Pipe and tube blanks | Forged pipe, tube and tubing blanks for further processing |
| Parameter | Range |
|---|---|
| Single-piece weight | 5 kg to 30 t |
| Bar diameter | 80 to 1200 mm |
| Rolled ring outside diameter | 300 to 4000 mm |
| Disc and block diameter | up to 2500 mm |
| Length | up to 12 000 mm |
| Melting routes | EAF + LF + VD, ESR available on request |
| Delivery condition | +NT, +QT, annealed, rough machined or finish machined |
| Certification | EN 10204 3.1 mill test certificate, 3.2 with third-party inspection (SGS, BV, TUV, Lloyd's) |
Confirm the exact limits for your part at enquiry stage.
How an X20CrMoV12-1 forging is produced
- SteelmakingEAF melting with ladle refining and vacuum degassing, ESR where maximum cleanliness is required.
- Open-die forgingIngot upsetting and drawing on hydraulic presses, finishing above 850 °C to close the as-cast structure.
- Heat treatmentNormalising and tempering, or quenching and tempering, on chart-recorded furnaces.
- TestingChemical analysis, tensile, impact and hardness testing, ultrasonic and magnetic-particle examination.
- MachiningRough or finish CNC machining to drawing, with dimensional inspection report.
- DocumentationEN 10204 3.1 or 3.2 certificate, heat-treatment chart, NDT and dimensional reports.
Quality control and testing
- Ladle and product chemical analysis by spectrometer
- Tensile, 0.2 % proof and elongation testing at room temperature
- Charpy V-notch impact testing, longitudinal and transverse
- Brinell hardness survey
- Ultrasonic examination to EN 10228-3 or ASTM A388
- Magnetic particle examination to EN 10228-1
- Grain size and microstructure evaluation
- Dimensional inspection report against the customer drawing
Request a quotation for X20CrMoV12-1 forgings
Send the drawing or the specification and we will quote. To price accurately we need the grade and standard, product form, finished and rough dimensions, quantity, required delivery condition (+NT or +QT), test and certification requirements, and the destination port.
Jiangyin Jiangnan Metal Co., Ltd., Open-Die Forging Factory
No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province 214423, China
Telephone, WhatsApp and WeChat: +86 189 2135 9659
E-mail: sales@steelforgepieces.com
Website: www.steelforgepieces.com
Frequently asked questions about X20CrMoV12-1
What is X20CrMoV12-1 steel?
X20CrMoV12-1 is a martensitic creep-resisting steel with material number 1.4922, containing about 12 % chromium together with molybdenum and vanadium. It is used for pressure-retaining and rotating components in continuous service at elevated temperature, typically up to 580-600 °C, in power generation, petrochemical and boiler plant.
Is X20CrMoV12-1 the same as 1.4922 and X20CrMoV11-1?
Yes. 1.4922 is the material number, X20CrMoV12-1 is the former DIN designation and X20CrMoV11-1 is the designation used in current EN standards. All three identify the same steel. It is a different grade from X22CrMoV12-1 (1.4923), which has a higher carbon content and a narrower chromium range.
What is the chemical composition of X20CrMoV12-1?
To EN 10302:2008, carbon 0.17-0.23 %, silicon max 0.50 %, manganese 0.30-1.00 %, phosphorus max 0.025 %, sulphur max 0.015 %, chromium 10.0-12.5 %, molybdenum 0.80-1.20 %, nickel 0.30-0.80 %, vanadium 0.25-0.35 %, balance iron. EN 10088-1:2005 applies tighter limits of Si max 0.40 % and V min 0.20 %.
What tensile and yield strength does X20CrMoV12-1 achieve?
In the normalised and tempered (+NT) condition, tensile strength 690-840 MPa and minimum yield strength 490 MPa, with minimum longitudinal elongation of 17 % and minimum impact energy of 40 J at +20 °C. In the quenched and tempered (+QT) condition, tensile strength 700-850 MPa, minimum 0.2 % proof strength 500 MPa, elongation 15-16 % and impact energy 27-39 J longitudinal.
What is the maximum service temperature of X20CrMoV12-1?
The grade is normally applied for continuous service up to about 580-600 °C. The permissible temperature for a specific component depends on stress level, design life and the creep rupture data of the applicable construction code, so the design allowable must be taken from that code rather than from a general data sheet.
How is X20CrMoV12-1 heat treated?
Hot forging is carried out between about 1100 °C and 850 °C. Austenitising is at 1020-1070 °C with an oil or air quench, followed by tempering at 700-780 °C with a soak of at least two hours and air cooling. Soft annealing at 700-780 °C with furnace cooling is used before machining. The tempering temperature sets the final strength level.
Can X20CrMoV12-1 be welded?
Yes, but it is an air-hardening steel and requires a controlled procedure: preheat of 300-400 °C, controlled interpass temperature, a matching or 12 % Cr filler metal, and a mandatory post-weld heat treatment below the original tempering temperature. Without PWHT the heat-affected zone stays hard and crack-sensitive.
Which product forms are available in X20CrMoV12-1?
Jiangyin Jiangnan Metal Co., Ltd. supplies forged round, square, flat and hex bars, hollow bars, sleeves and bushes, seamless rolled rings including turbine gland seal rings, forged discs, blocks and plates, rotor shafts, wheels, blades and impellers, valve bodies, bonnets, stems and discs, and bolts and studs, all made to customer drawing.
Who supplies X20CrMoV12-1 open-die forgings from China?
Jiangyin Jiangnan Metal Co., Ltd., an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China, manufactures X20CrMoV12-1 (1.4922) forgings to drawing, with EN 10204 3.1 or 3.2 certification and third-party inspection on request. Contact sales@steelforgepieces.com or +86 189 2135 9659.
What documentation is supplied with the forgings?
Every order is delivered with an EN 10204 3.1 mill test certificate, or 3.2 with third-party inspection by SGS, BV, TUV or Lloyd's, covering chemical analysis, mechanical test results, heat-treatment charts, ultrasonic and magnetic-particle examination reports and a dimensional inspection report.
Related grades and pages
- AISI 4140 forgings
- 42CrMo4 (1.7225) forgings
- AISI 4340 forgings
- 34CrMo4 (1.7220) forgings
- 17-4PH forgings
- Waspaloy forgings
- Inconel 617 forgings
- All alloy steel grades
Reference standards
Data on this page is compiled from EN 10302:2008 (creep-resisting steels), EN 10216-2 (seamless tubes for pressure purposes at elevated temperature), EN 10222-2 (steel forgings for pressure purposes), EN 10088-1:2005 (list of stainless steels), and DIN 17175 / DIN 17240. Where a figure is described as typical or indicative it is given for guidance only and is not a guaranteed property.