Steel 11CrMo9-10
EN 11CrMo9-10 · ASTM A182 F22
11CrMo9-10 (1.7383, A182 F22) is the forging grade of the 2.25 % Cr–1 % Mo heat-resistant family, supplied as flanges, valve bodies and heavy forgings in +A, +N, +NT, +QT and a hardness-controlled +QT-NACE condition for sour service.
Reference datasheet — 11CrMo9-10 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 +NT condition
11CrMo9-10 tempers and conditions
11CrMo9-10 is supplied in 5 conditions, soft to hard. +NT 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 condition, chosen for maximum machinability, deep cold sizing or when a low-hardness ferritic microstructure is specified. | 250 | 460 | 28 | 145 HB | — |
+NTDefault Normalized and tempered | Standard delivery condition for pressure forgings, plate and pipe (A182 F22 Cl.3 equivalent) — best balance of creep strength, toughness and weldability. | 360 | 580 | 22 | 175 HB | — |
Normalized | Intermediate stock condition (usually followed by tempering) giving a uniform bainitic/ferritic structure after forging. | 400 | 620 | 20 | 13 HRC | 7.8 % IACS |
+QT | Quenched-and-tempered with a capped hardness and controlled J/X-factor for wet H2S (sour) service flanges and valve bodies. | 440 | 620 | 22 | 19 HRC | 7.8 % IACS |
Quenched and tempered | Higher-strength condition for heavy-wall valve bodies and thick flanges where through-thickness yield strength and low-temperature toughness are critical. | 480 | 660 | 20 | 18 HRC | — |
What is 11CrMo9-10?
11CrMo9-10 (1.7383, A182 F22) is the forging grade of the 2.25 % Cr–1 % Mo heat-resistant family, supplied as flanges, valve bodies and heavy forgings in +A, +N, +NT, +QT and a hardness-controlled +QT-NACE condition for sour service. Typical properties are 360 MPa yield, 580 MPa tensile, 22 % elongation and about 175 HB (88 HRB), with service to roughly 550 °C. Welding (score 55) requires preheat, low-hydrogen practice and PWHT, machinability is moderate (55), and corrosion resistance is low (18) so wetted surfaces are usually coated or clad. 10CrMo9-10 covers the same chemistry in tube and pipe form. 11CrMo9-10 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). 11CrMo9-10 has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 72% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
What is 11CrMo9-10 used for?
- forged flanges
- valve bodies
- pressure vessel forgings
Advantages
- Tough — resists crack growth — 150 MPa·√m (136.5 ksi·√in), better than 96% of steel grades
- High service temperature — 550°C (1,022 °F), better than 95% of steel grades
11CrMo9-10 properties
Typical room-temperature values for 11CrMo9-10-+NT; bars are the position among steel grades.
Physical3
11CrMo9-10 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).
Mechanical16
11CrMo9-10 has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 72% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
11CrMo9-10 is rated for continuous service to 550°C (1,022 °F). It conducts heat at 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 73% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
11CrMo9-10 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (18/100), better than 83% of steel grades.
Sustainability4
Producing a kilogram of 11CrMo9-10 takes about 30 MJ of energy and emits 2.3 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 30%.
Manufacturability6
11CrMo9-10's machinability is good (55/100, better than 62% of steel grades); weldability good (55/100); formability fair (45/100).
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. 11CrMo9-10 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 11CrMo9-10
Is 11CrMo9-10 easy to machine?
Machines like 4140-class Cr-Mo at ~55 % of 1212; use rigid setups, coated carbide, 100–160 m/min in the +NT condition and expect higher tool wear after Q&T.
Can 11CrMo9-10 be welded?
Weld with matching 2.25Cr-1Mo consumables (E9018-B3 / ER90S-B3), preheat 200–250 °C, interpass ≤ 350 °C and PWHT 690–730 °C; control hydrogen and J/X factors to avoid reheat and temper embrittlement.
Can 11CrMo9-10 be formed, bent or molded?
Forge at 1050–1200 °C with slow cooling; cold forming is limited — bend or flange hot, then re-normalize and temper.
11CrMo9-10 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 | 0.08 – 0.14 | 0.11 |
| Si | ≤ 0.5 | 0.25 |
| Mn | 0.4 – 0.8 | 0.6 |
| Plower limits often imposed to control temper embrittlement (J-factor) | ≤ 0.02 | 0.01 |
| S | ≤ 0.01 | 0.01 |
| Cr | 2 – 2.5 | 2.25 |
| Mo | 0.9 – 1.1 | 1 |
| Ni | ≤ 0.3 | 0.15 |
| Cu | ≤ 0.3 | 0.1 |
| Fe | balance |
What surface finishes work on 11CrMo9-10?
Not corrosion resistant: shot-blast and apply high-temperature aluminium/silicone paint, metallize, or use stainless overlay/cladding on wetted surfaces; takes phosphate and electroless-nickel well.
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 11CrMo9-10 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- A182 F22
- EN / DIN / Werkstoff-Nr.
- 1.7383
How much does 11CrMo9-10 cost?
11CrMo9-10 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
11CrMo9-10 — frequently asked
What is 11CrMo9-10 used for?
11CrMo9-10 is typically used for forged flanges, valve bodies and pressure vessel forgings. In short: forging grade of P22; sour-service +QT option; 550 °C pressure forgings.
What is the yield strength of 11CrMo9-10?
11CrMo9-10 has a typical yield strength of 360 MPa (52.2 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 72% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 11CrMo9-10 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machines like 4140-class Cr-Mo at ~55 % of 1212; use rigid setups, coated carbide, 100–160 m/min in the +NT condition and expect higher tool wear after Q&T.
Can 11CrMo9-10 be welded?
Yes — weldability is rated good (55/100). Weld with matching 2.25Cr-1Mo consumables (E9018-B3 / ER90S-B3), preheat 200–250 °C, interpass ≤ 350 °C and PWHT 690–730 °C; control hydrogen and J/X factors to avoid reheat and temper embrittlement.
What surface finishes work on 11CrMo9-10?
Not corrosion resistant: shot-blast and apply high-temperature aluminium/silicone paint, metallize, or use stainless overlay/cladding on wetted surfaces; takes phosphate and electroless-nickel well.
Can 11CrMo9-10 be formed, bent or molded?
Forge at 1050–1200 °C with slow cooling; cold forming is limited — bend or flange hot, then re-normalize and temper.
What is the maximum service temperature of 11CrMo9-10?
11CrMo9-10 is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 11CrMo9-10 cost?
11CrMo9-10 is a standard-cost steel ($$), 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 10222-2 — Steel forgings for pressure purposes, ferritic and martensitic steels with elevated temperature properties — CEN (2017)
- EN 10028-2 — Flat products of steels for pressure purposes, non-alloy and alloy steels with elevated temperature properties — CEN (2017)
- ASTM A182/A182M — Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Fittings, Valves and Parts (Grade F22) — ASTM (2022)
- ASME BPVC Section II Part D — Material Properties (2.25Cr-1Mo) — ASME (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- API RP 941 — Steels for Hydrogen Service at Elevated Temperatures — API (2016)
- 12Cr2Mo1 / 12Cr2Mo1R — 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.