Copper Alloy CC212E
EN CC212E
A high-strength manganese-aluminum bronze cast alloy traditionally used for ship propellers and heavily loaded marine components where excellent toughness and corrosion resistance in seawater are required.
Reference datasheet — CC212E 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 GS condition
CC212E tempers and conditions
CC212E is supplied in 5 conditions, soft to hard. GS 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 |
|---|---|---|---|---|---|---|
Stress relieved | Standard post-weld/post-casting anneal for propellers: relieves residual stress and improves resistance to stress-corrosion cracking with a small strength loss. | 300 | 670 | 28 | 170 HB | 3 % IACS |
GSDefault Sand cast | Standard route for large propellers and heavy marine castings; lowest guaranteed proof strength but widely available in any size. | 320 | 700 | 25 | 180 HB | 3 % IACS |
Permanent (chill/gravity die) cast | Chill casting of smaller repeat parts: finer structure, higher proof strength and better surface than sand casting. | 340 | 720 | 24 | 185 HB | 3 % IACS |
Centrifugally cast | Bushings, sleeves and rings — dense, porosity-free wall with the highest ductility of the casting routes. | 345 | 730 | 26 | 185 HB | 3 % IACS |
Continuously cast | Continuous-cast bar/tube stock for machined bushings, nuts and wear parts; consistent properties and good machining stock removal. | 345 | 730 | 26 | 185 HB | 3 % IACS |
What is CC212E?
A high-strength manganese-aluminum bronze cast alloy traditionally used for ship propellers and heavily loaded marine components where excellent toughness and corrosion resistance in seawater are required. CC212E has a density of 7.5 g/cm³ (0.271 lb/in³), lighter than 98% of copper alloy grades. It melts at 870°C (1,598 °F). CC212E has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 68% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 115 GPa (16.7 Msi).
What is CC212E used for?
- ship propellers
- marine stern gear
- pump impellers
- heavy-duty bearings
Advantages
- Lightweight — 7.5 g/cm³ (0.271 lb/in³), better than 98% of copper alloy grades
- Good corrosion resistance — 82/100, better than 98% of copper alloy grades
- Readily welded — 70/100, better than 85% of copper alloy grades
Limitations
- Low electrical conductivity — 3 % IACS, worse than 100% of copper alloy grades
- Poor heat conductor — 21 W/m·K (12.1 BTU/hr·ft·°F), worse than 99% of copper alloy grades
CC212E properties
Typical room-temperature values for CC212E-GS; bars are the position among copper alloy grades.
Physical3
CC212E has a density of 7.5 g/cm³ (0.271 lb/in³), lighter than 98% of copper alloy grades. It melts at 870°C (1,598 °F).
Mechanical15
CC212E has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 68% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 115 GPa (16.7 Msi).
Thermal6
CC212E is rated for continuous service to 250°C (482 °F). It conducts heat at 21 W/m·K (12.1 BTU/hr·ft·°F), worse than 99% of copper alloy grades. Thermal expansion is 17.5 µm/m·K (9.72 µin/in·°F).
Electrical3
CC212E conducts electricity at 3 % IACS, worse than 100% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 98% of copper alloy grades.
Sustainability4
Producing a kilogram of CC212E takes about 58 MJ of energy and emits 4 kg of CO₂ — more than 61% of copper alloy grades. Typical recycled content is 45%.
Manufacturability8
CC212E's machinability is fair (45/100, better than 64% of copper alloy grades); weldability very good (70/100); formability poor (20/100).
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. CC212E is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CC212E
Is CC212E easy to machine?
Tough, gummy chips — use rigid setups, positive-rake carbide, moderate speed with heavy feed and flood coolant; rating roughly half of free-cutting brass.
Can CC212E be welded?
Readily GTAW/GMAW welded and weld-repaired with matching Mn-Al bronze filler; preheat 150–250 °C on heavy sections and stress relieve at ~650 °C afterwards.
Can CC212E be formed, bent or molded?
Casting alloy only — no cold forming; design for quiet bottom gating, generous risers and controlled cooling to avoid shrinkage and hot tearing in thick propeller blades.
CC212E 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 |
|---|---|---|
| Mn | 11 – 14 | 12.5 |
| Al | 7 – 8.5 | 7.8 |
| Fe | 2 – 4 | 3 |
| Ni | 1.5 – 3 | 2.5 |
| Znimpurity limit | ≤ 0.5 | |
| Snimpurity limit | ≤ 0.1 | |
| Siimpurity limit | ≤ 0.1 | |
| Pbimpurity limit | ≤ 0.05 | |
| Cu | ≥ 68 (balance) |
What surface finishes work on CC212E?
Grinds and polishes to a bright bronze finish; pickle to remove aluminium oxide before painting or antifouling; not anodizable, and cathodic protection is normally used in seawater service.
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).
Equivalent designations
Standards and trade names that resolve to Copper Alloy CC212E in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CuMn11Al8Fe3Ni3-C
How much does CC212E cost?
CC212E 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.
CC212E — frequently asked
What is CC212E used for?
CC212E is typically used for ship propellers, marine stern gear, pump impellers and heavy-duty bearings. In short: strongest cast marine bronze; weld-repairable propeller alloy; 700 MPa with 25% elongation.
What is the yield strength of CC212E?
CC212E has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 68% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is CC212E easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Tough, gummy chips — use rigid setups, positive-rake carbide, moderate speed with heavy feed and flood coolant; rating roughly half of free-cutting brass.
Can CC212E be welded?
Yes — weldability is rated very good (70/100). Readily GTAW/GMAW welded and weld-repaired with matching Mn-Al bronze filler; preheat 150–250 °C on heavy sections and stress relieve at ~650 °C afterwards.
What surface finishes work on CC212E?
Grinds and polishes to a bright bronze finish; pickle to remove aluminium oxide before painting or antifouling; not anodizable, and cathodic protection is normally used in seawater service.
Can CC212E be formed, bent or molded?
Casting alloy only — no cold forming; design for quiet bottom gating, generous risers and controlled cooling to avoid shrinkage and hot tearing in thick propeller blades.
What is the maximum service temperature of CC212E?
CC212E is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CC212E-GS and CC212E-GZ?
GS is the default condition — standard route for large propellers and heavy marine castings; lowest guaranteed proof strength but widely available in any size. GZ: bushings, sleeves and rings — dense, porosity-free wall with the highest ductility of the casting routes. Yield strength is 320 MPa in GS versus 345 MPa in GZ.
How much does CC212E cost?
CC212E 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
- EN 1982 — Copper and copper alloys: ingots and castings — CEN (2017)
- CDA alloy datasheet C95700 (manganese aluminium bronze) — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (copper alloys in seawater) — ASM International (2005)
- Marine propeller alloy (CuMn11Al8Fe3Ni3-C) casting data — Foundry/propeller manufacturers (2022)
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.