Steel A182 F92
ASTM A182 F92 · UNS K92460
Tungsten-strengthened 9Cr creep-strength-enhanced ferritic-martensitic forging steel (Grade 92) used for ultra-supercritical boiler and steam-piping flanges requiring the highest allowable stresses among 9Cr grades.
Reference datasheet — A182 F92 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 N+T condition
A182 F92 tempers and conditions
A182 F92 is supplied in 5 conditions, soft to hard. N+T 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 |
|---|---|---|---|---|---|---|
Sub-critical annealed | Interim soft condition for rough machining of large forgings; must be re-normalized/tempered before code service. | 400 | 630 | 26 | 185 HB | 3 % IACS |
N+T + simulated post-weld heat treatment | Order this when the forging will see field PWHT cycles and design must use post-PWHT (slightly softened) properties. | 480 | 670 | 24 | 15 HRC | 2.9 % IACS |
N+TDefault Normalized and tempered | Standard ASME/ASTM code condition for F92 flanges, valve bodies and fittings in USC steam service. | 520 | 710 | 22 | 20 HRC | — |
Quenched and tempered | Chosen for heavy-section forgings where still-air normalizing cannot guarantee full martensite through-thickness. | 560 | 745 | 21 | 22 HRC | 2.9 % IACS |
As-forged | Only an intermediate stage — untempered martensite is hard and brittle and is never acceptable for pressure service. | 900 | 1,200 | 10 | 41 HRC | 2.7 % IACS |
What is A182 F92?
Tungsten-strengthened 9Cr creep-strength-enhanced ferritic-martensitic forging steel (Grade 92) used for ultra-supercritical boiler and steam-piping flanges requiring the highest allowable stresses among 9Cr grades. A182 F92 has a density of 7.78 g/cm³ (0.281 lb/in³), lighter than 91% of steel grades. It melts at 1,420°C (2,588 °F). A182 F92 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 710 MPa (103 ksi) — stronger than 67% of steel grades. Elongation at break is 22% and the elastic modulus is 216 GPa (31.3 Msi).
What is A182 F92 used for?
- Ultra-supercritical boiler flanges
- High-temperature steam valve bodies
- Header forgings
Advantages
- High service temperature — 620°C (1,148 °F), better than 99% of steel grades
- Tough — resists crack growth — 150 MPa·√m (136.5 ksi·√in), better than 96% of steel grades
- Good corrosion resistance — 30/100, better than 95% of steel grades
Limitations
- Low electrical conductivity — 2.9 % IACS, worse than 93% of steel grades
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
- Poor heat conductor — 27 W/m·K (15.6 BTU/hr·ft·°F), worse than 86% of steel grades
- Difficult to machine — 38/100, worse than 80% of steel grades
A182 F92 properties
Typical room-temperature values for A182 F92-N+T; bars are the position among steel grades.
Physical3
A182 F92 has a density of 7.78 g/cm³ (0.281 lb/in³), lighter than 91% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
A182 F92 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 710 MPa (103 ksi) — stronger than 67% of steel grades. Elongation at break is 22% and the elastic modulus is 216 GPa (31.3 Msi).
Thermal6
A182 F92 is rated for continuous service to 620°C (1,148 °F). It conducts heat at 27 W/m·K (15.6 BTU/hr·ft·°F), worse than 86% of steel grades. Thermal expansion is 10.8 µm/m·K (6 µin/in·°F).
Electrical3
A182 F92 conducts electricity at 2.9 % IACS, worse than 93% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (30/100), better than 95% of steel grades.
Sustainability4
Producing a kilogram of A182 F92 takes about 34 MJ of energy and emits 2.6 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
A182 F92's machinability is fair (38/100, worse than 80% of steel grades); weldability fair (40/100); formability poor (25/100).
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. A182 F92 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A182 F92
Is A182 F92 easy to machine?
Machine in the N+T condition at ~200–230 HB with rigid setups, sharp coated carbide, moderate speed and heavy positive feed; the fine carbides are abrasive and work-hardening is mild but tool wear is high.
Can A182 F92 be welded?
GTAW/SMAW/SAW with matching Grade 92 consumables, 200–300 °C preheat and interpass ≤300 °C, cool to ~80–100 °C before a mandatory 755–780 °C PWHT; avoid excessive heat input to limit Type IV creep cracking in the fine-grained HAZ.
Can A182 F92 be formed, bent or molded?
Hot forge at 1100–1200 °C finishing above ~950 °C, then full re-normalize and temper; cold forming is essentially impractical.
A182 F92 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 | 0.07 – 0.13 | 0.11 |
| Mn | 0.3 – 0.6 | 0.45 |
| P | ≤ 0.02 | 0.01 |
| S | ≤ 0.01 | 0 |
| Si | ≤ 0.5 | 0.25 |
| Cr | 8.5 – 9.5 | 9 |
| Wsolid-solution and Laves-phase strengthening | 1.5 – 2 | 1.75 |
| Mo | 0.3 – 0.6 | 0.45 |
| VMX carbonitride former | 0.15 – 0.25 | 0.2 |
| Nblisted as Cb in ASTM | 0.04 – 0.09 | 0.06 |
| N | 0.03 – 0.07 | 0.05 |
| Bstabilizes M23C6 | 0 – 0.01 | 0 |
| Ni | ≤ 0.4 | 0.15 |
| Alsoluble Al limit | ≤ 0.02 | 0.01 |
| Ti | ≤ 0.01 | 0 |
| Zr | ≤ 0.01 | 0 |
| Fe | balance | — |
What surface finishes work on A182 F92?
Not corrosion-resistant — protect with high-temperature paint, aluminizing, chromizing or thermal-spray coatings; no anodizing, and any coating bake must stay below the tempering temperature.
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 A182 F92 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K92460
- ASTM
- A335 P92
How much does A182 F92 cost?
A182 F92 is a high-cost steel ($$$$), pricier than about 78% 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.
A182 F92 — frequently asked
What is A182 F92 used for?
A182 F92 is typically used for ultra-supercritical boiler flanges, high-temperature steam valve bodies and header forgings. In short: highest-strength 9Cr forging grade; ultra-supercritical steam service; mandatory post-weld heat treatment.
What is the yield strength of A182 F92?
A182 F92 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 710 MPa (103 ksi) — stronger than 67% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is A182 F92 easy to machine?
Not especially — machinability is rated fair (38/100, worse than 80% of steel grades). Machine in the N+T condition at ~200–230 HB with rigid setups, sharp coated carbide, moderate speed and heavy positive feed; the fine carbides are abrasive and work-hardening is mild but tool wear is high.
Can A182 F92 be welded?
With care — weldability is rated fair (40/100). GTAW/SMAW/SAW with matching Grade 92 consumables, 200–300 °C preheat and interpass ≤300 °C, cool to ~80–100 °C before a mandatory 755–780 °C PWHT; avoid excessive heat input to limit Type IV creep cracking in the fine-grained HAZ.
What surface finishes work on A182 F92?
Not corrosion-resistant — protect with high-temperature paint, aluminizing, chromizing or thermal-spray coatings; no anodizing, and any coating bake must stay below the tempering temperature.
Can A182 F92 be formed, bent or molded?
Hot forge at 1100–1200 °C finishing above ~950 °C, then full re-normalize and temper; cold forming is essentially impractical.
What is the maximum service temperature of A182 F92?
A182 F92 is rated for continuous use to about 620°C (1,148 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between A182 F92 N+T and A182 F92-AF?
N+T is the default condition — standard ASME/ASTM code condition for F92 flanges, valve bodies and fittings in USC steam service. AF: only an intermediate stage — untempered martensite is hard and brittle and is never acceptable for pressure service. Yield strength is 520 MPa in N+T versus 900 MPa in AF.
How much does A182 F92 cost?
A182 F92 is a high-cost steel ($$$$), pricier than about 78% 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
- ASTM A182/A182M — Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Fittings, Valves and Parts for High-Temperature Service (Grade F92) — ASTM International (2024)
- ASTM A335/A335M — Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service (Grade P92) — ASTM International (2022)
- ASME BPVC Section II Part D — Properties (Metric): allowable stresses, E, α, k for 9Cr-2W steels — ASME (2023)
- EN 10222-2 / EN 10216-2 X10CrWMoVNb9-2 (1.4901) — CEN (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- NIMS Creep Data Sheets, ASME Grade 92 (9Cr-0.5Mo-1.8W-V-Nb) steel — NIMS (2014)
- Vallourec / Nippon Steel Grade 92 (P92/T92) product literature — Vallourec; Nippon Steel (2021)
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.