Copper Alloy C48200
UNS C48200 · ASTM B21 · EN CW714R · JIS C4802
C48200 is a leaded naval brass (CW714R) that adds lead to the C46400 α+β tin-brass to raise machinability to about 70 % of AISI 1212 while retaining naval-brass corrosion resistance; rod, bar and forgings are supplied to ASTM B21.
Reference datasheet — C48200 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 M30 condition
C48200 tempers and conditions
C48200 is supplied in 8 conditions, soft to hard. M30 is the default FabDigit quotes; the values on this page are for it.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Fully recrystallised, lowest strength and highest ductility; choose for maximum cold forming, flaring or spinning and to eliminate residual-stress cracking. | 150 | 372 | 45 | 85 HB | — |
M30Default As hot extruded | Standard stock condition for round/hex bar and shapes; best ductility with good machinability, pick for general turned parts and further forging. | 172 | 379 | 40 | 100 HB | 26 % IACS |
As hot forged and air cooled | Standard delivery state for hot-forged marine hardware and valve bodies; sound wrought structure with good ductility, no post-forge treatment. | 186 | 414 | 33 | 105 HB | 26 % IACS |
Light annealed | Partial anneal that relieves drawing stresses (SCC risk) while keeping some strength; a good compromise before moderate bending or staking. | 190 | 400 | 40 | 95 HB | 26 % IACS |
As forged and quenched | Water-quenched straight off the press to retain a finer β structure; slightly stronger and harder forgings with less scale, used where dimensional and strength consistency matter. | 205 | 448 | 30 | 115 HB | 25 % IACS |
Extruded and drawn | Choose when close diameter tolerance and a straight, bright bar are needed with only moderate strengthening. | 275 | 448 | 25 | 125 HB | — |
Half hard | Best balance of strength, straightness and chip control for valve stems, screw-machine parts and threaded fittings. | 345 | 483 | 20 | 140 HB | — |
Full hard | Highest strength and stiffness in service; use for wear surfaces, small-diameter stems and springs where ductility is not required. | 400 | 517 | 15 | 160 HB | — |
What is C48200?
C48200 is a leaded naval brass (CW714R) that adds lead to the C46400 α+β tin-brass to raise machinability to about 70 % of AISI 1212 while retaining naval-brass corrosion resistance; rod, bar and forgings are supplied to ASTM B21. It suits high-volume screw-machine parts for marine service, with 172 MPa yield, 379 MPa tensile, 40 % elongation, 100 HB (55 HRB), 26 % IACS and 200 °C maximum service temperature. The lead makes it effectively unweldable and cold formability is only fair (score 45); use C46500 where welding or added dezincification resistance in seawater service is the priority. C48200 has a density of 8.44 g/cm³ (0.305 lb/in³), lighter than 70% of copper alloy grades. It melts at 885°C (1,625 °F). C48200 has a yield strength of 172 MPa (24.9 ksi) and a tensile strength of 379 MPa (55 ksi) — weaker than 60% of copper alloy grades. Elongation at break is 40% and the elastic modulus is 100 GPa (14.5 Msi).
What is C48200 used for?
- valve stems
- marine fittings
- machined marine hardware
Advantages
- Low embodied carbon — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
- Ductile — tolerates forming and impact — 40%, better than 84% of copper alloy grades
- Easy to machine — 70/100, better than 78% of copper alloy grades
Limitations
- Low stiffness — 100 GPa (14.5 Msi), worse than 82% of copper alloy grades
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C48200 properties
Typical room-temperature values for C48200-M30; bars are the position among copper alloy grades.
Physical3
C48200 has a density of 8.44 g/cm³ (0.305 lb/in³), lighter than 70% of copper alloy grades. It melts at 885°C (1,625 °F).
Mechanical14
C48200 has a yield strength of 172 MPa (24.9 ksi) and a tensile strength of 379 MPa (55 ksi) — weaker than 60% of copper alloy grades. Elongation at break is 40% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
C48200 is rated for continuous service to 200°C (392 °F). It conducts heat at 116 W/m·K (67 BTU/hr·ft·°F), better than 64% of copper alloy grades. Thermal expansion is 21.2 µm/m·K (11.8 µin/in·°F).
Electrical3
C48200 conducts electricity at 26 % IACS, better than 63% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C48200 takes about 53 MJ of energy and emits 3.2 kg of CO₂ — less than 85% of copper alloy grades. Typical recycled content is 60%.
Manufacturability8
C48200's machinability is very good (70/100, better than 78% of copper alloy grades); weldability poor (25/100); formability fair (45/100).
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. C48200 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C48200
Is C48200 easy to machine?
Excellent free-cutting behaviour (~70% of AISI 1212); use zero-to-negative rake brass geometry, high speed, light lubricant — chips break short thanks to the lead.
Can C48200 be welded?
Arc/resistance welding not recommended (lead hot-cracking and zinc fume); join by soldering, brazing or mechanical means with good ventilation.
Can C48200 be formed, bent or molded?
Hot working (650–780 °C) and hot forging are excellent; cold formability is only fair — anneal or use O60 before severe bending, and stress-relieve to avoid ammonia SCC.
C48200 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 |
|---|---|---|
| Cu | 59 – 62 | 60.5 |
| Sninhibits dezincification | 0.5 – 1 | 0.75 |
| Pbfree-machining addition | 0.4 – 1 | 0.7 |
| Fe | ≤ 0.1 | 0.03 |
| Zn | balance |
What surface finishes work on C48200?
Takes a high mechanical or electro-polish; commonly chrome/nickel plated or lacquered; not anodizable — benzotriazole or chromate passivation for tarnish control.
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 C48200 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B21
- EN / DIN / Werkstoff-Nr.
- CW714R
- JIS
- C4802
How much does C48200 cost?
C48200 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.
C48200 — frequently asked
What is C48200 used for?
C48200 is typically used for valve stems, marine fittings and machined marine hardware. In short: best-machining naval brass; free-cutting marine rod; screw-machine marine parts.
What is the yield strength of C48200?
C48200 has a typical yield strength of 172 MPa (24.9 ksi) and a tensile strength of 379 MPa (55 ksi) — weaker than 60% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C48200 easy to machine?
Yes — machinability is rated very good (70/100, better than 78% of copper alloy grades). Excellent free-cutting behaviour (~70% of AISI 1212); use zero-to-negative rake brass geometry, high speed, light lubricant — chips break short thanks to the lead.
Can C48200 be welded?
Not readily — weldability is rated poor (25/100). Arc/resistance welding not recommended (lead hot-cracking and zinc fume); join by soldering, brazing or mechanical means with good ventilation.
What surface finishes work on C48200?
Takes a high mechanical or electro-polish; commonly chrome/nickel plated or lacquered; not anodizable — benzotriazole or chromate passivation for tarnish control.
Can C48200 be formed, bent or molded?
Hot working (650–780 °C) and hot forging are excellent; cold formability is only fair — anneal or use O60 before severe bending, and stress-relieve to avoid ammonia SCC.
What is the maximum service temperature of C48200?
C48200 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 C48200-M30 and C48200-H04?
M30 is the default condition — standard stock condition for round/hex bar and shapes; best ductility with good machinability, pick for general turned parts and further forging. H04: highest strength and stiffness in service; use for wear surfaces, small-diameter stems and springs where ductility is not required. Yield strength is 172 MPa in M30 versus 400 MPa in H04.
How much does C48200 cost?
C48200 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
- CDA Alloy Datasheet C48200 (leaded naval brass) — Copper Development Association (2023)
- ASTM B21/B21M — Naval Brass Rod, Bar and Shapes — ASTM International (2021)
- ASTM B283/B283M — Copper and Copper-Alloy Die Forgings — ASTM International (2020)
- 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)
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.