Steel A182 F36
ASTM A182 F36 · UNS K21001
ASTM A182 F36 is a special low-alloy carbon-manganese forging grade (UNS K21001) supplied in Class 1 and Class 2 conditions with enhanced low-temperature toughness requirements.
Reference datasheet — A182 F36 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 CL2 condition
A182 F36 tempers and conditions
A182 F36 is supplied in 3 conditions, soft to hard. CL2 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 | Occasionally supplied soft for heavy machining or re-forging, with final N+T or Q&T applied afterwards to meet A182 properties. | 350 | 540 | 30 | 150 HB | 8 % IACS |
Class 1 | Lower-strength, highest-toughness option for thick flanges and fittings where ductility and weldability matter more than strength. | 465 | 620 | 25 | 180 HB | — |
CL2Default Class 2 | Standard high-strength condition for pressure-rated flanges, hubs and fittings needing 515 MPa minimum yield with low-temperature toughness. | 570 | 690 | 22 | 18 HRC | — |
Supply forms, finishes and certifications
Ways A182 F36 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
CL2-S3 | Class 2 + S3 low-temperature impact tested | Certification |
What is A182 F36?
ASTM A182 F36 is a special low-alloy carbon-manganese forging grade (UNS K21001) supplied in Class 1 and Class 2 conditions with enhanced low-temperature toughness requirements. It is specified for flanges and fittings in cold or impact-critical service, offering 570 MPa yield, 690 MPa tensile, 22 % elongation and about 210 HB (18 HRC) with service to 400 °C. Formability is modest (score 42) because of the high yield strength, the alloy has no corrosion resistance and must be coated, and heavy-section welds need PWHT to restore HAZ toughness for −46 °C duty. A182 F36 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 F36 has a yield strength of 570 MPa (82.7 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 74% of steel grades. Elongation at break is 22% and the elastic modulus is 207 GPa (30 Msi).
What is A182 F36 used for?
- Cold-service flanges
- Fittings requiring guaranteed low-temperature impact toughness
- Valve bodies for low-temperature piping
- Weld-neck flanges for pipeline connections
- Pressure vessel nozzles in cold service
- Forged pipe couplings for impact-critical lines
Advantages
- Tough — resists crack growth — 150 MPa·√m (136.5 ksi·√in), better than 96% of steel grades
A182 F36 properties
Typical room-temperature values for A182 F36-CL2; bars are the position among steel grades.
Physical3
A182 F36 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).
Mechanical17
A182 F36 has a yield strength of 570 MPa (82.7 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 74% of steel grades. Elongation at break is 22% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
A182 F36 is rated for continuous service to 400°C (752 °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 F36 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of A182 F36 takes about 26 MJ of energy and emits 2.1 kg of CO₂ — less than 64% of steel grades. Typical recycled content is 30%.
Manufacturability7
A182 F36's machinability is good (55/100, better than 62% of steel grades); weldability good (68/100); formability fair (42/100).
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 F36 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A182 F36
Is A182 F36 easy to machine?
Machines like a 4130-class low-alloy steel at ~55–65 % of 1212; use rigid setups, coated carbide, 120–180 m/min turning in Q&T condition and expect gummy chips in the annealed state.
Can A182 F36 be welded?
Readily weldable with low-hydrogen E80xx/ER80S consumables; preheat 100–150 °C for heavy sections and apply PWHT at 595–650 °C to restore HAZ toughness for -46 °C service.
Can A182 F36 be formed, bent or molded?
Hot forge at 1100–1230 °C with finish above ~900 °C, then normalize/quench and temper; cold forming is limited to gentle bends because of the high yield strength.
A182 F36 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 |
|---|---|---|
| Clow carbon for weldability and toughness | 0.1 – 0.17 | 0.14 |
| Mn | 0.8 – 1.2 | 1 |
| Si | 0.15 – 0.35 | 0.25 |
| P | ≤ 0.03 | — |
| Smax; often restricted to 0.010 for impact grades | ≤ 0.03 | — |
| Nitoughness at low temperature | 0.25 – 0.5 | 0.4 |
| Mohardenability / temper resistance | 0.45 – 0.65 | 0.55 |
| Crresidual limit | ≤ 0.3 | 0.15 |
| Curesidual limit | ≤ 0.5 | 0.2 |
| Nbgrain refinement | 0.02 – 0.05 | 0.03 |
| Vmicroalloy addition | ≤ 0.08 | 0.04 |
| Bhardenability, when specified | ≤ 0 | 0 |
| Fe | balance | — |
What surface finishes work on A182 F36?
No anodizing — protect by shot blast + zinc-rich epoxy, hot-dip galvanizing (watch for hydrogen/liquid-metal embrittlement risk on Q&T parts), phosphating or electroless nickel; polishes to a moderate mirror but corrodes rapidly bare.
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 F36 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K21001
How much does A182 F36 cost?
A182 F36 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 F36 — frequently asked
What is A182 F36 used for?
A182 F36 is typically used for cold-service flanges, fittings requiring guaranteed low-temperature impact toughness, valve bodies for low-temperature piping, weld-neck flanges for pipeline connections, pressure vessel nozzles in cold service and forged pipe couplings for impact-critical lines. In short: toughness-rated forging grade; high yield C-Mn steel; qualified for −46 °C service.
What is the yield strength of A182 F36?
A182 F36 has a typical yield strength of 570 MPa (82.7 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 74% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is A182 F36 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machines like a 4130-class low-alloy steel at ~55–65 % of 1212; use rigid setups, coated carbide, 120–180 m/min turning in Q&T condition and expect gummy chips in the annealed state.
Can A182 F36 be welded?
Yes — weldability is rated good (68/100). Readily weldable with low-hydrogen E80xx/ER80S consumables; preheat 100–150 °C for heavy sections and apply PWHT at 595–650 °C to restore HAZ toughness for -46 °C service.
What surface finishes work on A182 F36?
No anodizing — protect by shot blast + zinc-rich epoxy, hot-dip galvanizing (watch for hydrogen/liquid-metal embrittlement risk on Q&T parts), phosphating or electroless nickel; polishes to a moderate mirror but corrodes rapidly bare.
Can A182 F36 be formed, bent or molded?
Hot forge at 1100–1230 °C with finish above ~900 °C, then normalize/quench and temper; cold forming is limited to gentle bends because of the high yield strength.
What is the maximum service temperature of A182 F36?
A182 F36 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between A182 F36-CL2 and A182 F36-ANN?
CL2 is the default condition — standard high-strength condition for pressure-rated flanges, hubs and fittings needing 515 MPa minimum yield with low-temperature toughness. ANN: occasionally supplied soft for heavy machining or re-forging, with final N+T or Q&T applied afterwards to meet A182 properties. Yield strength is 570 MPa in CL2 versus 350 MPa in ANN.
How much does A182 F36 cost?
A182 F36 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)
- ASME BPVC Section II Part D — Material Properties (physical property tables, low-alloy ferritic steels) — ASME (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASTM A370 — Test Methods and Definitions for Mechanical Testing of Steel Products (hardness conversions) — ASTM International (2022)
- UNS K21001 alloy record (Metals & Alloys in the Unified Numbering System) — SAE/ASTM (2017)
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.