Copper Alloy C41500-OS035
Temper
UNS C41500
OS035 = annealed to 0.035 mm grain size
Softest commercial anneal for deep drawing and severe bending of tube and cup shapes.
Values for the OS035 condition
Other C41500 tempers and conditions
C41500 is listed in 9 conditions; see the grade overview at C41500.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OS035This page Annealed to 0.035 mm grain size | Softest commercial anneal for deep drawing and severe bending of tube and cup shapes. | 110 | 317 | 46 | 35 HRB | — |
Annealed to 0.015 mm grain size | Fine-grain anneal: best surface finish after forming while still fully soft. | 124 | 331 | 43 | 42 HRB | 28 % IACS |
Quarter hard | Mild temper when parts still need moderate bending but higher stiffness than annealed. | 315 | 386 | 25 | 60 HRB | — |
H02Default Half hard | Most commonly stocked strip temper: balanced strength and forming for terminals, hose and hardware. | 400 | 455 | 12 | 72 HRB | 28 % IACS |
Three-quarter hard | Higher-strength stamping temper for lightly formed contacts and clips. | 448 | 496 | 7 | 78 HRB | — |
Full hard | Standard hard temper for flat springs, washers and formed hardware with wide-radius bends only. | 483 | 524 | 5 | 82 HRB | 28 % IACS |
Extra hard | Use where high yield strength and stiffness matter more than bend formability. | 550 | 586 | 3 | 88 HRB | — |
Spring hard | Spring temper for flexible metal hose convolutions, bellows and contact springs. | 586 | 627 | 2 | 91 HRB | — |
Extra spring hard | Maximum cold-rolled strength for thin spring strip; bending essentially limited to with-grain, generous radii. | 620 | 655 | 2 | 93 HRB | — |
What is C41500-OS035?
C41500-OS035 is C41500 in the OS035 temper — softest commercial anneal for deep drawing and severe bending of tube and cup shapes. C41500-OS035 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 317 MPa (46 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 46% and the elastic modulus is 110 GPa (16 Msi). C41500-OS035 has a density of 8.78 g/cm³ (0.317 lb/in³), heavier than 53% of copper alloy grades. It melts at 955°C (1,751 °F). H02 is the default condition FabDigit quotes; OS035 is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 46%, better than 96% of copper alloy grades
- Forms and bends easily — 92/100, better than 91% of copper alloy grades
Limitations
- Low strength — 110 MPa (16 ksi), worse than 82% of copper alloy grades
C41500-OS035 properties
Typical room-temperature values for C41500-OS035; 10 are specific to this condition. Other listed values are C41500 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C41500-OS035 has a density of 8.78 g/cm³ (0.317 lb/in³), heavier than 53% of copper alloy grades. It melts at 955°C (1,751 °F).
Mechanical12
C41500-OS035 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 317 MPa (46 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 46% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C41500-OS035 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 18.4 µm/m·K (10.2 µin/in·°F).
Electrical3
C41500-OS035 conducts electricity at 28 % IACS, better than 69% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C41500-OS035 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C41500-OS035's machinability is poor (28/100, worse than 78% of copper alloy grades); weldability fair (45/100); formability excellent (92/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C41500-OS035
Is C41500 easy to machine?
Machinability about 30 % of free-cutting brass — use sharp positive-rake tools, good chip breaking and flood coolant; chips are stringy in soft tempers.
Can C41500 be welded?
Resistance and brazing/soldering are excellent; fusion welding (GTAW) is only fair due to zinc fume and porosity — use low heat input and phosphor-bronze filler.
Can C41500 be formed, bent or molded?
Excellent cold forming in OS tempers (deep draw, roll form, convolute); interanneal ~450–600 °C and stress-relieve formed parts (~250 °C) to prevent ammonia SCC.
What surface finishes work on C41500?
Takes bright polishing, tin, nickel and silver plating readily; not anodizable — protect with lacquer or benzotriazole tarnish inhibitor.
C41500 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 Ag | 89 – 93 | 91 |
| Sn | 1.5 – 2.2 | 1.8 |
| Pb | ≤ 0.1 | — |
| Fe | ≤ 0.05 | — |
| Znremainder, nominally ~7 % | balance | — |
C41500-OS035 — frequently asked
What is C41500-OS035 used for?
C41500-OS035 is typically used for flexible hose/tube, electrical hardware and corrugated tubing. In short: formable tin brass tube; convolutes without cracking; low machinability rating.
What is the yield strength of C41500-OS035?
C41500-OS035 has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 317 MPa (46 ksi) — weaker than 82% of copper alloy grades. Strength varies by condition: see the 9 listed tempers.
Is C41500-OS035 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 78% of copper alloy grades). Machinability about 30 % of free-cutting brass — use sharp positive-rake tools, good chip breaking and flood coolant; chips are stringy in soft tempers.
Can C41500-OS035 be welded?
With care — weldability is rated fair (45/100). Resistance and brazing/soldering are excellent; fusion welding (GTAW) is only fair due to zinc fume and porosity — use low heat input and phosphor-bronze filler.
What surface finishes work on C41500-OS035?
Takes bright polishing, tin, nickel and silver plating readily; not anodizable — protect with lacquer or benzotriazole tarnish inhibitor.
Can C41500-OS035 be formed, bent or molded?
Excellent cold forming in OS tempers (deep draw, roll form, convolute); interanneal ~450–600 °C and stress-relieve formed parts (~250 °C) to prevent ammonia SCC.
What is the maximum service temperature of C41500-OS035?
C41500-OS035 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 C41500-H02 and C41500-OS035?
H02 is the default condition — most commonly stocked strip temper: balanced strength and forming for terminals, hose and hardware. OS035: softest commercial anneal for deep drawing and severe bending of tube and cup shapes. Yield strength is 400 MPa in H02 versus 110 MPa in OS035.
Sources
- ASTM B591 Standard Specification for Copper-Zinc-Tin Alloy Plate, Sheet, Strip and Rolled Bar — ASTM International (2022)
- CDA Alloy Database — C41500 tin brass — 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.