Copper Alloy C37100-O60
Temper
UNS C37100
O60 = soft annealed
Pick when maximum ductility is required for subsequent bending, staking or heading.
Values for the O60 condition
Other C37100 tempers and conditions
C37100 is listed in 6 conditions; see the grade overview at C37100.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
O60This page Soft annealed | Pick when maximum ductility is required for subsequent bending, staking or heading. | 125 | 315 | 48 | 90 HB | 28 % IACS |
As hot extruded | Pick for large-diameter rod and forgings where machining follows and no cold work is needed. | 140 | 340 | 40 | 100 HB | 28 % IACS |
Light annealed | Pick for machined parts needing good ductility and dimensional stability with slightly higher strength than fully soft rod. | 140 | 330 | 42 | 95 HB | 28 % IACS |
Quarter hard | Pick when a small strength/straightness gain is wanted but some bending is still required. | 205 | 360 | 30 | 115 HB | 27.5 % IACS |
Half hard | Pick for general screw-machine rod where good chip control plus moderate strength is required. | 255 | 385 | 23 | 128 HB | 27 % IACS |
H80Default Hard drawn | Default stocked rod condition: highest strength and straightness with excellent machining chip break. | 275 | 395 | 20 | 135 HB | 28 % IACS |
What is C37100-O60?
C37100-O60 is C37100 in the O60 temper — pick when maximum ductility is required for subsequent bending, staking or heading. C37100-O60 has a yield strength of 125 MPa (18.1 ksi) and a tensile strength of 315 MPa (45.7 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 48% and the elastic modulus is 103 GPa (14.9 Msi). C37100-O60 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). H80 is the default condition FabDigit quotes; O60 is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 48%, better than 97% of copper alloy grades
- Low embodied carbon — 3.1 kg CO₂/kg, better than 95% of copper alloy grades
- Easy to machine — 68/100, better than 77% of copper alloy grades
Limitations
- Low strength — 125 MPa (18.1 ksi), worse than 77% of copper alloy grades
C37100-O60 properties
Typical room-temperature values for C37100-O60; 20 are specific to this condition. Other listed values are C37100 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C37100-O60 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).
Mechanical13
C37100-O60 has a yield strength of 125 MPa (18.1 ksi) and a tensile strength of 315 MPa (45.7 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 48% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C37100-O60 is rated for continuous service to 200°C (392 °F). It conducts heat at 123 W/m·K (71.1 BTU/hr·ft·°F), better than 70% of copper alloy grades. Thermal expansion is 20.8 µm/m·K (11.6 µin/in·°F).
Electrical3
C37100-O60 conducts electricity at 28 % IACS, better than 69% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of C37100-O60 takes about 48 MJ of energy and emits 3.1 kg of CO₂ — less than 92% of copper alloy grades. Typical recycled content is 65%.
Manufacturability8
C37100-O60's machinability is good (68/100, better than 77% of copper alloy grades); weldability fair (35/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C37100-O60
Is C37100 easy to machine?
Excellent free-cutting behaviour (~70 % of C36000); use zero/negative rake brass geometry, high speeds, light coolant, and expect short chips.
Can C37100 be welded?
Fusion welding is not recommended because of lead and zinc fuming; join by soft soldering or silver brazing with adequate ventilation.
Can C37100 be formed, bent or molded?
Hot forge and extrude readily at 650–760 °C; cold formability is only fair — anneal near 425–600 °C before severe bending or heading.
What surface finishes work on C37100?
Takes bright dipping, benzotriazole passivation, lacquer, and nickel/chrome or tin plating well; not anodizable.
C37100 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 |
|---|---|---|
| Cuincludes silver by CDA convention | 58 – 62 | 60 |
| Pbfree-machining addition | 0.6 – 1.2 | 0.9 |
| Fe | ≤ 0.15 | — |
| Znremainder, nominally ~39 % | balance | — |
C37100-O60 — frequently asked
What is C37100-O60 used for?
C37100-O60 is typically used for machined fittings, hardware components, plumbing and gas fittings, valve stems and spindles, hose couplings from forged blanks and threaded bushings and adapters. In short: free-cutting Muntz brass; 78 machinability rating; forgeable at 650–760 °C.
What is the yield strength of C37100-O60?
C37100-O60 has a typical yield strength of 125 MPa (18.1 ksi) and a tensile strength of 315 MPa (45.7 ksi) — weaker than 77% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is C37100-O60 easy to machine?
Reasonably — machinability is rated good (68/100, better than 77% of copper alloy grades). Excellent free-cutting behaviour (~70 % of C36000); use zero/negative rake brass geometry, high speeds, light coolant, and expect short chips.
Can C37100-O60 be welded?
With care — weldability is rated fair (35/100). Fusion welding is not recommended because of lead and zinc fuming; join by soft soldering or silver brazing with adequate ventilation.
What surface finishes work on C37100-O60?
Takes bright dipping, benzotriazole passivation, lacquer, and nickel/chrome or tin plating well; not anodizable.
Can C37100-O60 be formed, bent or molded?
Hot forge and extrude readily at 650–760 °C; cold formability is only fair — anneal near 425–600 °C before severe bending or heading.
What is the maximum service temperature of C37100-O60?
C37100-O60 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 C37100-H80 and C37100-O60?
H80 is the default condition — default stocked rod condition: highest strength and straightness with excellent machining chip break. O60: pick when maximum ductility is required for subsequent bending, staking or heading. Yield strength is 275 MPa in H80 versus 125 MPa in O60.
Sources
- Copper Alloy C37100 alloy datasheet — Copper Development Association (copper.org) (2024)
- ASTM B124/B124M – Copper and Copper-Alloy Forging Rod, Bar, and Shapes — ASTM International (2020)
- ASTM B453/B453M – Copper-Zinc-Lead (Leaded Brass) Rod, Bar and Shapes — ASTM International (2019)
- 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.