Copper Alloy C79600-H01
Supply condition
UNS C79600
H01 = quarter hard
Choose when parts still need some bending or swaging after machining but better chip control than annealed.
Values for the H01 condition
Other C79600 tempers and conditions
C79600 is listed in 6 conditions; see the grade overview at C79600.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick when maximum ductility for staking, riveting or secondary forming of machined parts is needed. | 165 | 400 | 32 | 105 HB | 9 % IACS |
Annealed to 0.035 mm grain size | Grain-size-controlled anneal ordered when consistent deep-drawing or coining response is required after machining. | 175 | 415 | 30 | 105 HB | 8.5 % IACS |
As hot extruded | Standard mill condition for large-diameter rod and shapes before any drawing; best straightness-to-cost for rough machining. | 210 | 450 | 25 | 125 HB | 8.5 % IACS |
H01This page Quarter hard | Choose when parts still need some bending or swaging after machining but better chip control than annealed. | 310 | 480 | 22 | 140 HB | 8.2 % IACS |
H02Default Half hard | The default stocked rod condition — best balance of strength, straightness and free-cutting behaviour for screw-machine parts. | 400 | 550 | 15 | 160 HB | 8 % IACS |
Full hard | Use for small-diameter pins, shafts and springy parts where maximum strength and stiffness of the as-drawn bar matters. | 480 | 620 | 8 | 11 HRC | 7.5 % IACS |
What is C79600-H01?
C79600-H01 is C79600 supplied in the H01 condition — choose when parts still need some bending or swaging after machining but better chip control than annealed. C79600-H01 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 117 GPa (17 Msi). C79600-H01 has a density of 8.52 g/cm³ (0.308 lb/in³), lighter than 63% of copper alloy grades. It melts at 875°C (1,607 °F). H02 is the default condition FabDigit quotes; H01 is available on request or by drawing note.
Advantages
- Easy to machine — 70/100, better than 78% of copper alloy grades
Limitations
- Poor heat conductor — 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 89% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
- Low electrical conductivity — 8.2 % IACS, worse than 79% of copper alloy grades
C79600-H01 properties
Typical room-temperature values for C79600-H01; 20 are specific to this condition. Other listed values are C79600 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C79600-H01 has a density of 8.52 g/cm³ (0.308 lb/in³), lighter than 63% of copper alloy grades. It melts at 875°C (1,607 °F).
Mechanical12
C79600-H01 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C79600-H01 is rated for continuous service to 180°C (356 °F). It conducts heat at 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 89% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C79600-H01 conducts electricity at 8.2 % IACS, worse than 79% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of C79600-H01 takes about 62 MJ of energy and emits 4.2 kg of CO₂ — more than 76% of copper alloy grades. Typical recycled content is 40%.
Manufacturability7
C79600-H01's machinability is very good (70/100, better than 78% of copper alloy grades); weldability poor (20/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C79600-H01
Is C79600 easy to machine?
Excellent free-cutting behaviour — lead breaks chips; run at brass-type speeds with sharp positive-rake tools and light oil; rating ≈70 % of C36000.
Can C79600 be welded?
Fusion welding is not recommended (lead causes hot shortness); join by soft soldering, low-temperature silver brazing or mechanical means.
Can C79600 be formed, bent or molded?
Hot extrude/forge at ~700–800 °C; cold forming limited by the beta phase and lead — keep bends generous and anneal between heavy operations.
What surface finishes work on C79600?
Polishes to a bright silver-white lustre; readily nickel-, chrome- or silver-plated, and often lacquered to prevent tarnish. Avoid ammonia-based cleaners (SCC risk).
C79600 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 | 43 – 46 | 44.5 |
| Niincludes Co | 9 – 11 | 10 |
| Pbfree-machining addition | 0.8 – 1.8 | 1.3 |
| Fe | ≤ 0.25 | 0.1 |
| Mn | ≤ 0.5 | 0.2 |
| Znremainder, nominally ~44% | balance | — |
C79600-H01 — frequently asked
What is C79600-H01 used for?
C79600-H01 is typically used for screw-machine rod stock, valve components, decorative hardware and plumbing fittings. In short: free-cutting nickel silver rod; 70% of C36000 machinability; bright finish, low conductivity.
What is the yield strength of C79600-H01?
C79600-H01 has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 64% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is C79600-H01 easy to machine?
Yes — machinability is rated very good (70/100, better than 78% of copper alloy grades). Excellent free-cutting behaviour — lead breaks chips; run at brass-type speeds with sharp positive-rake tools and light oil; rating ≈70 % of C36000.
Can C79600-H01 be welded?
Not readily — weldability is rated poor (20/100). Fusion welding is not recommended (lead causes hot shortness); join by soft soldering, low-temperature silver brazing or mechanical means.
What surface finishes work on C79600-H01?
Polishes to a bright silver-white lustre; readily nickel-, chrome- or silver-plated, and often lacquered to prevent tarnish. Avoid ammonia-based cleaners (SCC risk).
Can C79600-H01 be formed, bent or molded?
Hot extrude/forge at ~700–800 °C; cold forming limited by the beta phase and lead — keep bends generous and anneal between heavy operations.
What is the maximum service temperature of C79600-H01?
C79600-H01 is rated for continuous use to about 180°C (356 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C79600-H02 and C79600-O61?
H02 is the default condition — the default stocked rod condition — best balance of strength, straightness and free-cutting behaviour for screw-machine parts. O61: pick when maximum ductility for staking, riveting or secondary forming of machined parts is needed. Yield strength is 400 MPa in H02 versus 165 MPa in O61.
Sources
- ASTM B151/B151M — Copper-Nickel-Zinc (Nickel Silver) Rod and Bar — ASTM International (2019)
- CDA Alloy Database — C79600 leaded nickel silver — 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.