Steel A182 F2
ASTM A182 F2 · UNS K12122
ASTM A182 F2 is a low-chromium 0.5Cr-0.5Mo forging steel (UNS K12122) from the A182 pressure-component family, sharing its chemistry with A335 P2 piping.
Reference datasheet — A182 F2 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 F2 tempers and conditions
A182 F2 is supplied in 3 conditions, soft to hard. N+T 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 |
|---|---|---|---|---|---|---|
Solution annealed | Pick when maximum machinability and dimensional stability matter, or for heavy sections requiring softest condition before final machining. | 300 | 500 | 30 | 150 HB | — |
N+TDefault Normalized and tempered | Standard supply condition for A182 F2 flanges and fittings; best balance of strength, toughness and creep behaviour for 400–540 °C service. | 330 | 520 | 27 | 160 HB | — |
Quenched and tempered | Used for heavier forged valve bodies or when higher yield strength and uniform through-thickness properties are needed within the A182 hardness cap. | 420 | 585 | 23 | 185 HB | — |
Supply forms, finishes and certifications
Ways A182 F2 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
P2-PIPE | A335 P2 seamless pipe | Supply form |
What is A182 F2?
ASTM A182 F2 is a low-chromium 0.5Cr-0.5Mo forging steel (UNS K12122) from the A182 pressure-component family, sharing its chemistry with A335 P2 piping. Engineers use it where plain carbon steel loses strength in warm service: normalized and tempered material gives 330 MPa yield, 520 MPa tensile, 27 % elongation and about 160 HB (84 HRB), with service to 540 °C in forged flanges, fittings and valve bodies. Chromium is too low for meaningful oxidation or sulfidation resistance, and code welding requires preheat plus PWHT; move to F11 or F22 when higher temperature or creep strength is needed. A182 F2 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). A182 F2 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 78% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
What is A182 F2 used for?
- Boiler flanges
- Fittings
- Valve bodies for moderate-temperature service
Advantages
- High service temperature — 540°C (1,004 °F), better than 93% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
Limitations
- Low strength — 330 MPa (47.9 ksi), worse than 78% of steel grades
A182 F2 properties
Typical room-temperature values for A182 F2-N+T; bars are the position among steel grades.
Physical3
A182 F2 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical15
A182 F2 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 78% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
A182 F2 is rated for continuous service to 540°C (1,004 °F). It conducts heat at 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 56% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
A182 F2 conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of A182 F2 takes about 30 MJ of energy and emits 2.2 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 25%.
Manufacturability7
A182 F2's machinability is good (58/100, better than 75% of steel grades); weldability good (65/100); formability good (55/100).
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 F2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A182 F2
Is A182 F2 easy to machine?
Machines like a normalized 4130-class low-alloy steel at ~60 % of 1212; use rigid setups, carbide inserts and moderate speeds — annealed stock gives the best finish.
Can A182 F2 be welded?
P-No.3 material: preheat ~150–200 °C, use E8018-B1/ER80S-B2 (1.25Cr) or matching low-alloy filler, and apply PWHT at 650–700 °C for code work.
Can A182 F2 be formed, bent or molded?
Hot forge at 1050–1200 °C with finishing above ~900 °C, then normalize and temper; cold forming is limited to gentle bends on annealed material.
A182 F2 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 | 0.05 – 0.21 | 0.15 |
| Mn | 0.3 – 0.61 | 0.45 |
| Si | 0.1 – 0.6 | 0.3 |
| P | ≤ 0.04 | — |
| S | ≤ 0.04 | — |
| Cr | 0.5 – 0.81 | 0.65 |
| Mo | 0.44 – 0.65 | 0.55 |
| Fe | balance | — |
What surface finishes work on A182 F2?
No anodizing; protect with paint, phosphate or metallizing, and consider aluminizing for hot oxidizing service.
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 F2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K12122
- ASTM
- A335 P2
How much does A182 F2 cost?
A182 F2 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.
A182 F2 — frequently asked
What is A182 F2 used for?
A182 F2 is typically used for boiler flanges, fittings and valve bodies for moderate-temperature service. In short: entry-level Cr-Mo forging grade; 540 °C service limit; lowest-cost creep-resistant Cr-Mo.
What is the yield strength of A182 F2?
A182 F2 has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 78% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is A182 F2 easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Machines like a normalized 4130-class low-alloy steel at ~60 % of 1212; use rigid setups, carbide inserts and moderate speeds — annealed stock gives the best finish.
Can A182 F2 be welded?
Yes — weldability is rated good (65/100). P-No.3 material: preheat ~150–200 °C, use E8018-B1/ER80S-B2 (1.25Cr) or matching low-alloy filler, and apply PWHT at 650–700 °C for code work.
What surface finishes work on A182 F2?
No anodizing; protect with paint, phosphate or metallizing, and consider aluminizing for hot oxidizing service.
Can A182 F2 be formed, bent or molded?
Hot forge at 1050–1200 °C with finishing above ~900 °C, then normalize and temper; cold forming is limited to gentle bends on annealed material.
What is the maximum service temperature of A182 F2?
A182 F2 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.
What is the difference between A182 F2 N+T and A182 F2-A?
N+T is the default condition — standard supply condition for A182 F2 flanges and fittings; best balance of strength, toughness and creep behaviour for 400–540 °C service. A: pick when maximum machinability and dimensional stability matter, or for heavy sections requiring softest condition before final machining. Yield strength is 330 MPa in N+T versus 300 MPa in A.
How much does A182 F2 cost?
A182 F2 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
- ASTM A182/A182M — Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Fittings, Valves and Parts for High-Temperature Service — ASTM International (2023)
- ASTM A335/A335M — Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service (Grade P2) — ASTM International (2023)
- ASME BPVC Section II Part D — Properties (Metric) — ASME (2023)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Machinery's Handbook, 31st ed. (machinability ratings) — Industrial Press (2020)
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.