Copper Alloy C27200
UNS C27200
C27200 is a wrought yellow brass in the C20000–C49999 family, similar to C27000 and stocked in OS025 and OS050 through H80 and M20 tempers.
Reference datasheet — C27200 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 OS025 condition
C27200 tempers and conditions
C27200 is supplied in 10 conditions, soft to hard. OS025 is the default FabDigit quotes; the values on this page are for it.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed to 0.050 mm grain size | Coarser-grain anneal for the deepest draws where slight orange peel is acceptable. | 97 | 317 | 62 | 55 HB | 27 % IACS |
OS025Default Annealed to 0.025 mm grain size | Softest commercial condition — pick for deep drawing, spinning and severe forming. | 110 | 330 | 55 | 60 HB | 27 % IACS |
As hot rolled | Economical as-hot-worked rod, plate and shapes for parts that will be machined or annealed later. | 125 | 340 | 50 | 65 HB | 27 % IACS |
Quarter hard | Light temper for parts needing moderate bending plus a little more stiffness than annealed. | 275 | 385 | 43 | 75 HB | — |
Half hard | Most common strip temper for stamped hardware needing 90° bends and useful strength. | 345 | 427 | 23 | 110 HB | — |
Hard drawn | Cold-drawn round product temper — pick for straight, strong rod, wire and tube stock for machining or bending. | 345 | 470 | 15 | 130 HB | — |
Three-quarter hard | Intermediate temper when H02 is too soft and H04 too brittle for the bend radius. | 380 | 470 | 15 | 130 HB | 26 % IACS |
Full hard | Standard high-strength strip/sheet temper for flat springs, contacts and stiff stampings. | 414 | 510 | 8 | 145 HB | — |
Extra hard | Choose for maximum flat-strip strength where only gentle forming across grain is required. | 448 | 570 | 5 | 165 HB | — |
Spring hard | Spring temper strip/wire for clips and contacts; very limited bendability, prone to SCC if not stress relieved. | 500 | 620 | 4 | 180 HB | 26 % IACS |
What is C27200?
C27200 is a wrought yellow brass in the C20000–C49999 family, similar to C27000 and stocked in OS025 and OS050 through H80 and M20 tempers. Annealed material provides 110 MPa yield, 330 MPa tensile and 55 % elongation at 60 HB, with 123 W/m·K and 27 % IACS, so it is used for low-cost stampings, wire products and decorative hardware. It machines at only about 30 % of AISI 1212, fusion welds poorly because of zinc loss, and is limited to 200 °C service with an ammonia season-cracking risk. C26800 or free-cutting C36000 are the nearest substitutes. C27200 has a density of 8.47 g/cm³ (0.306 lb/in³), lighter than 68% of copper alloy grades. It melts at 905°C (1,661 °F). C27200 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 55% and the elastic modulus is 103 GPa (14.9 Msi).
What is C27200 used for?
- hardware
- decorative trim
- stampings
- wire products
Advantages
- Ductile — tolerates forming and impact — 55%, better than 98% of copper alloy grades
- Forms and bends easily — 95/100, better than 94% of copper alloy grades
- Polishes to a fine finish — 85/100, better than 92% of copper alloy grades
Limitations
- Low strength — 110 MPa (16 ksi), worse than 82% of copper alloy grades
- High embodied carbon — 4.5 kg CO₂/kg, worse than 79% of copper alloy grades
C27200 properties
Typical room-temperature values for C27200-OS025; bars are the position among copper alloy grades.
Physical3
C27200 has a density of 8.47 g/cm³ (0.306 lb/in³), lighter than 68% of copper alloy grades. It melts at 905°C (1,661 °F).
Mechanical13
C27200 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 55% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C27200 is rated for continuous service to 200°C (392 °F). It conducts heat at 123 W/m·K (71.1 BTU/hr·ft·°F), better than 70% of copper alloy grades. Thermal expansion is 20.3 µm/m·K (11.3 µin/in·°F).
Electrical3
C27200 conducts electricity at 27 % IACS, better than 67% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C27200 takes about 65 MJ of energy and emits 4.5 kg of CO₂ — more than 81% of copper alloy grades. Typical recycled content is 45%.
Manufacturability8
C27200's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability fair (45/100); formability excellent (95/100).
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 copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C27200 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C27200
Is C27200 easy to machine?
Machinable but gummy compared with leaded C36000 (≈30 % of AISI 1212) — use sharp positive-rake tools, high speed, light feeds and good lubrication; prefer H02/H04 tempers for cleaner chips.
Can C27200 be welded?
Best joined by soldering or brazing; GTAW/oxyfuel possible with silicon-bronze filler but zinc volatilization causes porosity and fume — provide extraction and avoid resistance welding.
Can C27200 be formed, bent or molded?
Excellent cold formability in OS025/OS050 for deep drawing, spinning and stamping; interanneal at 425–600 °C and stress-relieve cold-worked parts at 260–300 °C to prevent season cracking.
C27200 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 |
|---|---|---|
| Cuincludes silver | 62 – 65 | 63 |
| Pb | ≤ 0.07 | |
| Fe | ≤ 0.07 | |
| Zn | balance |
What surface finishes work on C27200?
Buffs to a bright gold lustre; readily nickel/chrome/gold plated, chemically antiqued or lacquered — anodizing is not applicable to copper alloys.
Surface treatments FabDigit runs on copper alloy 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).
How much does C27200 cost?
C27200 is a high-cost copper alloy ($$$$), 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.
C27200 — frequently asked
What is C27200 used for?
C27200 is typically used for hardware, decorative trim, stampings and wire products. In short: low-cost decorative brass; excellent deep-drawing formability; gummy compared with C36000.
What is the yield strength of C27200?
C27200 has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 82% of copper alloy grades. Strength varies by condition: see the 10 listed tempers.
Is C27200 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Machinable but gummy compared with leaded C36000 (≈30 % of AISI 1212) — use sharp positive-rake tools, high speed, light feeds and good lubrication; prefer H02/H04 tempers for cleaner chips.
Can C27200 be welded?
With care — weldability is rated fair (45/100). Best joined by soldering or brazing; GTAW/oxyfuel possible with silicon-bronze filler but zinc volatilization causes porosity and fume — provide extraction and avoid resistance welding.
What surface finishes work on C27200?
Buffs to a bright gold lustre; readily nickel/chrome/gold plated, chemically antiqued or lacquered — anodizing is not applicable to copper alloys.
Can C27200 be formed, bent or molded?
Excellent cold formability in OS025/OS050 for deep drawing, spinning and stamping; interanneal at 425–600 °C and stress-relieve cold-worked parts at 260–300 °C to prevent season cracking.
What is the maximum service temperature of C27200?
C27200 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C27200-OS025 and C27200-H08?
OS025 is the default condition — softest commercial condition — pick for deep drawing, spinning and severe forming. H08: spring temper strip/wire for clips and contacts; very limited bendability, prone to SCC if not stress relieved. Yield strength is 110 MPa in OS025 versus 500 MPa in H08.
How much does C27200 cost?
C27200 is a high-cost copper alloy ($$$$), 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 B36/B36M Brass Plate, Sheet, Strip and Rolled Bar — ASTM International (2018)
- ASTM B134/B134M Brass Wire — ASTM International (2015)
- CDA Copper Alloy Datasheet C27200 — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
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.