Stainless Steel 1.4923
EN 1.4923
1.4923 (X22CrMoV12-1, S42200, 1Cr12MoV) is a creep-resisting 12% Cr martensitic steel with Mo and V additions, supplied hardened and tempered in +A, +QT1 and +QT2 conditions.
Reference datasheet — 1.4923 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 +QT1 condition
1.4923 tempers and conditions
1.4923 is supplied in 3 conditions, soft to hard. +QT1 is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Delivery condition for bar/forging stock that will be machined rough and then hardened and tempered by the fabricator. | 450 | 720 | 20 | 20 HRC | — |
+QT1Default Hardened and high-temperature tempered, Rm 800–950 MPa | Standard creep-service condition for steam-turbine bolting and high-temperature fasteners; best toughness/relaxation balance. | 680 | 880 | 17 | 27 HRC | — |
Hardened and tempered to higher strength, Rm 900–1050 MPa | Choose when higher proof stress (Rp0.2 ≥ 700 MPa) is required for bolting or blades, accepting lower ductility and toughness. | 780 | 970 | 15 | 31 HRC | — |
What is 1.4923?
1.4923 (X22CrMoV12-1, S42200, 1Cr12MoV) is a creep-resisting 12% Cr martensitic steel with Mo and V additions, supplied hardened and tempered in +A, +QT1 and +QT2 conditions. It reaches 680 MPa yield, 880 MPa tensile, 17% elongation and 265 HB (27 HRC) with service to 550 °C, which is why it remains a standard for steam turbine bolting, studs and rotor discs. Machinability is about one-third that of 1212 (score 35), weldability (30) and formability (20) are low, and corrosion resistance (42) suits steam rather than wet service. 1.4922 is the softer, more machinable alternative. 1.4923 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,420°C (2,588 °F). 1.4923 has a yield strength of 680 MPa (98.6 ksi) and a tensile strength of 880 MPa (128 ksi) — stronger than 91% of stainless steel grades. Elongation at break is 17% and the elastic modulus is 216 GPa (31.3 Msi).
What is 1.4923 used for?
- Steam turbine bolts and studs
- Turbine rotor discs
- High-temperature valve stems
- Power plant fasteners
Advantages
- High electrical conductivity — 3 % IACS, better than 95% of stainless steel grades
- Low embodied carbon — 3.2 kg CO₂/kg, better than 95% of stainless steel grades
- High strength — 680 MPa (98.6 ksi), better than 91% of stainless steel grades
- Conducts heat well — 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades
Limitations
- Needs corrosion protection — 42/100, worse than 90% of stainless steel grades
- Difficult to weld — 30/100, worse than 88% of stainless steel grades
- Limited ductility — 17%, worse than 86% of stainless steel grades
- Limited formability — 20/100, worse than 86% of stainless steel grades
- Low fracture toughness — 80 MPa·√m (72.8 ksi·√in), worse than 79% of stainless steel grades
1.4923 properties
Typical room-temperature values for 1.4923-+QT1; bars are the position among stainless steel grades.
Physical3
1.4923 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
1.4923 has a yield strength of 680 MPa (98.6 ksi) and a tensile strength of 880 MPa (128 ksi) — stronger than 91% of stainless steel grades. Elongation at break is 17% and the elastic modulus is 216 GPa (31.3 Msi).
Thermal6
1.4923 is rated for continuous service to 550°C (1,022 °F). It conducts heat at 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades. Thermal expansion is 10.8 µm/m·K (6 µin/in·°F).
Electrical3
1.4923 conducts electricity at 3 % IACS, better than 95% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (42/100), worse than 90% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4923 takes about 46 MJ of energy and emits 3.2 kg of CO₂ — less than 88% of stainless steel grades. Typical recycled content is 55%.
Manufacturability8
1.4923's machinability is fair (35/100, better than 51% of stainless steel grades); weldability poor (30/100); formability poor (20/100).
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 stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.4923 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4923
Is 1.4923 easy to machine?
Machine in the +A or fully tempered condition with rigid setups, sharp carbide tooling, low speed and generous coolant; work-hardening and poor chip breaking make it roughly one-third as machinable as 1212.
Can 1.4923 be welded?
Weldable with matching 12CrMoV or Cr-Mo filler using 250–350 °C preheat, controlled interpass and mandatory post-weld temper at 700–750 °C to avoid untempered martensite cracking.
Can 1.4923 be formed, bent or molded?
Hot work at 1100–850 °C followed by slow cooling and annealing; cold forming is limited to minor straightening because of the high tempered-martensite strength.
1.4923 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 | 0.18 – 0.24 | 0.21 |
| Si | ≤ 0.5 | 0.3 |
| Mn | 0.4 – 0.9 | 0.6 |
| Pimpurity | ≤ 0.03 | |
| Simpurity | ≤ 0.02 | |
| Cr | 11 – 12.5 | 11.8 |
| Mo | 0.8 – 1.2 | 1 |
| Ni | 0.3 – 0.8 | 0.55 |
| V | 0.25 – 0.35 | 0.3 |
| Fe | balance |
What surface finishes work on 1.4923?
Passivate or grind/polish after heat treatment; anodizing is not applicable — nitriding, chrome plating or high-temperature anti-seize coatings are used for bolting.
Surface treatments FabDigit runs on stainless 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).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.4923 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X22CrMoV12-1
- Similar grades
- S422001Cr12MoV
How much does 1.4923 cost?
1.4923 is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4923 — frequently asked
What is 1.4923 used for?
1.4923 is typically used for steam turbine bolts and studs, turbine rotor discs, high-temperature valve stems and power plant fasteners. In short: standard 12Cr bolting steel; 680 MPa yield to 550 °C; requires post-weld temper.
What is the yield strength of 1.4923?
1.4923 has a typical yield strength of 680 MPa (98.6 ksi) and a tensile strength of 880 MPa (128 ksi) — stronger than 91% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4923 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Machine in the +A or fully tempered condition with rigid setups, sharp carbide tooling, low speed and generous coolant; work-hardening and poor chip breaking make it roughly one-third as machinable as 1212.
Can 1.4923 be welded?
Not readily — weldability is rated poor (30/100). Weldable with matching 12CrMoV or Cr-Mo filler using 250–350 °C preheat, controlled interpass and mandatory post-weld temper at 700–750 °C to avoid untempered martensite cracking.
What surface finishes work on 1.4923?
Passivate or grind/polish after heat treatment; anodizing is not applicable — nitriding, chrome plating or high-temperature anti-seize coatings are used for bolting.
Can 1.4923 be formed, bent or molded?
Hot work at 1100–850 °C followed by slow cooling and annealing; cold forming is limited to minor straightening because of the high tempered-martensite strength.
What is the maximum service temperature of 1.4923?
1.4923 is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1.4923 cost?
1.4923 is a premium-cost stainless steel ($$$), cheaper than about 51% 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 10269 — Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties — CEN (2013)
- EN 10088-3 — Stainless steels: technical delivery conditions for semi-finished products, bars, rods — CEN (2014)
- DIN 17240 — Heat resisting and highly heat resisting materials for bolts and nuts — DIN (1976)
- GB/T 1221 / GB/T 8732 (1Cr12MoV ) — SAC (2007)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- X22CrMoV12-1 (1.4923) turbine bolting steel datasheet — European special steel producers (2022)
- 1Cr12MoV — Mysteel / 1688 (2025)
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.