Steel A182 F2-A (Solution annealed)
Temper
ASTM A182 F2 · UNS K12122
Pick when maximum machinability and dimensional stability matter, or for heavy sections requiring softest condition before final machining.
Values for the A condition
Other A182 F2 tempers and conditions
A182 F2 is listed in 3 conditions; see the grade overview at A182 F2.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AThis page 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 | — |
What is A182 F2-A?
A182 F2-A is A182 F2 in the A temper — pick when maximum machinability and dimensional stability matter, or for heavy sections requiring softest condition before final machining. A182 F2-A has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 86% of steel grades. Elongation at break is 30% and the elastic modulus is 205 GPa (29.7 Msi). A182 F2-A 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). N+T is the default condition FabDigit quotes; A is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 30%, better than 93% of steel grades
- High service temperature — 540°C (1,004 °F), better than 93% of steel grades
- Easy to machine — 63/100, better than 92% of steel grades
Limitations
- Low strength — 300 MPa (43.5 ksi), worse than 86% of steel grades
A182 F2-A properties
Typical room-temperature values for A182 F2-A; 13 are specific to this condition. Other listed values are A182 F2 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
A182 F2-A 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-A has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 86% of steel grades. Elongation at break is 30% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
A182 F2-A 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-A 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-A 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-A's machinability is good (63/100, better than 92% of steel grades); weldability good (68/100); formability good (60/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with A182 F2-A
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.
What surface finishes work on A182 F2?
No anodizing; protect with paint, phosphate or metallizing, and consider aluminizing for hot oxidizing service.
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 | — |
A182 F2-A — frequently asked
What is A182 F2-A used for?
A182 F2-A 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-A?
A182 F2-A has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 86% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is A182 F2-A easy to machine?
Reasonably — machinability is rated good (63/100, better than 92% 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-A be welded?
Yes — weldability is rated good (68/100). 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-A?
No anodizing; protect with paint, phosphate or metallizing, and consider aluminizing for hot oxidizing service.
Can A182 F2-A 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-A?
A182 F2-A 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.