Copper Alloy C48200-H50
Supply condition
UNS C48200 · ASTM B21 · EN CW714R · JIS C4802
H50 = extruded and drawn
Choose when close diameter tolerance and a straight, bright bar are needed with only moderate strengthening.
Values for the H50 condition
Other C48200 tempers and conditions
C48200 is listed in 8 conditions; see the grade overview at C48200.
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 |
H50This page 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-H50?
C48200-H50 is C48200 supplied in the H50 condition — choose when close diameter tolerance and a straight, bright bar are needed with only moderate strengthening. C48200-H50 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 448 MPa (65 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 100 GPa (14.5 Msi). C48200-H50 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). M30 is the default condition FabDigit quotes; H50 is available on request or by drawing note.
Advantages
- Low embodied carbon — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
- Easy to machine — 72/100, better than 79% 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-H50 properties
Typical room-temperature values for C48200-H50; 11 are specific to this condition. Other listed values are C48200 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C48200-H50 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-H50 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 448 MPa (65 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
C48200-H50 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-H50 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-H50 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-H50's machinability is very good (72/100, better than 79% of copper alloy grades); weldability poor (25/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C48200-H50
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.
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.
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 | — |
C48200-H50 — frequently asked
What is C48200-H50 used for?
C48200-H50 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-H50?
C48200-H50 has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 448 MPa (65 ksi) — stronger than 57% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C48200-H50 easy to machine?
Yes — machinability is rated very good (72/100, better than 79% 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-H50 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-H50?
Takes a high mechanical or electro-polish; commonly chrome/nickel plated or lacquered; not anodizable — benzotriazole or chromate passivation for tarnish control.
Can C48200-H50 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-H50?
C48200-H50 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.