Copper Alloy C63020-M30
Temper
UNS C63020 · ASTM B150
M30 = as hot extruded
Mill-condition bar taken straight from extrusion; pick it when parts will be heat treated after rough machining or when full TQ50 strength is not needed.
Values for the M30 condition
Other C63020 tempers and conditions
C63020 is listed in 5 conditions; see the grade overview at C63020.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Furnace-annealed condition supplied for maximum ductility prior to heavy machining or hot working; not a service condition for structural loads. | 450 | 760 | 20 | 15 HRC | 7.5 % IACS |
As hot rolled | Near-net forged shafts, flanges and valve bodies before heat treatment; usually followed by TQ50 to meet B150 minima. | 520 | 800 | 17 | 19 HRC | 7 % IACS |
M30This page As hot extruded | Mill-condition bar taken straight from extrusion; pick it when parts will be heat treated after rough machining or when full TQ50 strength is not needed. | 550 | 830 | 16 | 21 HRC | — |
Drawn and stress relieved | Cold-drawn small-diameter bar with a stress-relief anneal; chosen for straightness, tighter tolerance and good surface on fasteners and pins. | 650 | 900 | 12 | 26 HRC | 7 % IACS |
TQ50Default Quench hardened and tempered | Standard stocked condition for C63020 bar/forgings; use whenever the full 900 MPa class strength and ASTM B150 property minima are required. | 725 | 965 | 13 | 29 HRC | 7 % IACS |
What is C63020-M30?
C63020-M30 is C63020 in the M30 temper — mill-condition bar taken straight from extrusion; pick it when parts will be heat treated after rough machining or when full TQ50 strength is not needed. C63020-M30 has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 92% of copper alloy grades. Elongation at break is 16% and the elastic modulus is 117 GPa (17 Msi). C63020-M30 has a density of 7.58 g/cm³ (0.274 lb/in³), lighter than 94% of copper alloy grades. It melts at 1,027°C (1,881 °F). TQ50 is the default condition FabDigit quotes; M30 is available on request or by drawing note.
Advantages
- Lightweight — 7.58 g/cm³ (0.274 lb/in³), better than 94% of copper alloy grades
- Good corrosion resistance — 78/100, better than 94% of copper alloy grades
- High strength — 550 MPa (79.8 ksi), better than 92% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
Limitations
- Low electrical conductivity — 7 % IACS, worse than 86% of copper alloy grades
- Poor heat conductor — 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 82% of copper alloy grades
C63020-M30 properties
Typical room-temperature values for C63020-M30; 10 are specific to this condition. Other listed values are C63020 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C63020-M30 has a density of 7.58 g/cm³ (0.274 lb/in³), lighter than 94% of copper alloy grades. It melts at 1,027°C (1,881 °F).
Mechanical16
C63020-M30 has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 92% of copper alloy grades. Elongation at break is 16% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C63020-M30 is rated for continuous service to 300°C (572 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 82% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C63020-M30 conducts electricity at 7 % IACS, worse than 86% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 94% of copper alloy grades.
Sustainability4
Producing a kilogram of C63020-M30 takes about 57 MJ of energy and emits 3.8 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 30%.
Manufacturability8
C63020-M30's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability fair (45/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C63020-M30
Is C63020 easy to machine?
Machine at low surface speed with rigid setups, positive-rake carbide or CBN and generous coolant; hard κ-phase particles cause rapid tool wear, chips are stringy — chip-break by interrupted feed.
Can C63020 be welded?
GTAW/GMAW with matching NAB filler (ERCuNiAl / AWS A5.7 A-2); preheat 150–200 °C, control interpass below ~250 °C and post-weld temper at ~675 °C to restore corrosion resistance and avoid gamma-2.
Can C63020 be formed, bent or molded?
Hot work between about 850 and 950 °C only; cold formability is very poor — no significant bending or cold heading in the TQ50 condition.
What surface finishes work on C63020?
Not anodizable; pickle/passivate after heat treatment, then mechanically polish or bead-blast. Accepts electroless nickel or chrome plating with proper activation; naturally forms a protective olive-brown alumina/oxide film in seawater.
C63020 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 |
|---|---|---|
| Al | 10 – 11 | 10.5 |
| NiNi + Co | 4.2 – 6 | 5 |
| Fe | 4 – 5.5 | 4.7 |
| Mn | ≤ 1.5 | 0.8 |
| Si | ≤ 0.25 | — |
| Zn | ≤ 0.3 | — |
| Sn | ≤ 0.25 | — |
| Pb | ≤ 0.03 | — |
| Curemainder, 74.5 % min | ≥ 74.5 (balance) | — |
C63020-M30 — frequently asked
What is C63020-M30 used for?
C63020-M30 is typically used for marine gears, high-load bushings, aerospace fittings and pump components. In short: highest-strength aluminum bronze; heat-treatable nickel-aluminum bronze; seawater service to 300 °C.
What is the yield strength of C63020-M30?
C63020-M30 has a typical yield strength of 550 MPa (79.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 92% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C63020-M30 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Machine at low surface speed with rigid setups, positive-rake carbide or CBN and generous coolant; hard κ-phase particles cause rapid tool wear, chips are stringy — chip-break by interrupted feed.
Can C63020-M30 be welded?
With care — weldability is rated fair (45/100). GTAW/GMAW with matching NAB filler (ERCuNiAl / AWS A5.7 A-2); preheat 150–200 °C, control interpass below ~250 °C and post-weld temper at ~675 °C to restore corrosion resistance and avoid gamma-2.
What surface finishes work on C63020-M30?
Not anodizable; pickle/passivate after heat treatment, then mechanically polish or bead-blast. Accepts electroless nickel or chrome plating with proper activation; naturally forms a protective olive-brown alumina/oxide film in seawater.
Can C63020-M30 be formed, bent or molded?
Hot work between about 850 and 950 °C only; cold formability is very poor — no significant bending or cold heading in the TQ50 condition.
What is the maximum service temperature of C63020-M30?
C63020-M30 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C63020-TQ50 and C63020-O60?
TQ50 is the default condition — standard stocked condition for C63020 bar/forgings; use whenever the full 900 MPa class strength and ASTM B150 property minima are required. O60: furnace-annealed condition supplied for maximum ductility prior to heavy machining or hot working; not a service condition for structural loads. Yield strength is 725 MPa in TQ50 versus 450 MPa in O60.
Sources
- ASTM B150/B150M — Aluminum Bronze Rod, Bar and Shapes — ASTM International (2019)
- CDA/UNS Alloy Data — C630xx Nickel-Aluminum Bronzes — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Nickel-Aluminium Bronze bar and forging datasheets — Specialty copper alloy producers (2022)
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.