Copper Alloy C41300
UNS C41300
C41300 is a low-zinc tin brass — copper-zinc with a tin addition that raises strength and corrosion resistance over plain brasses of similar zinc content — supplied across a wide temper range from OS050 through H10.
Reference datasheet — C41300 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 H02 condition
C41300 tempers and conditions
C41300 is supplied in 10 conditions, soft to hard. H02 is the default FabDigit quotes; the values on this page are for it.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed to 0.050 mm grain size | Softest commercial temper — pick for deep drawing, severe forming and re-drawn parts. | 117 | 331 | 45 | 65 HB | 29 % IACS |
Annealed to 0.025 mm grain size | Fine-grain anneal — pick when a smooth orange-peel-free surface after forming is required. | 145 | 359 | 38 | 80 HB | 29 % IACS |
1/8 hard | Lightly rolled — pick when flatness/stiffness for handling is needed but the part still sees moderate bending. | 275 | 372 | 28 | 85 HB | 28 % IACS |
Quarter hard | Pick for stamped parts with 90° bends across grain plus moderate spring-back control. | 330 | 400 | 18 | 105 HB | 28 % IACS |
H02Default Half hard | Most stocked general-purpose temper — good balance of strength and bendability for terminals, clips and washers. | 400 | 455 | 8 | 130 HB | 28 % IACS |
Three-quarter hard | Pick when higher yield is needed but full-hard bend cracking must be avoided. | 448 | 496 | 6 | 145 HB | 28 % IACS |
Full hard | Pick for flat stamped springs and contacts with only gentle forming, where high yield matters. | 483 | 524 | 4 | 158 HB | 28 % IACS |
Extra hard | Pick for high-force contact springs where forming is limited to large-radius bends with grain. | 524 | 565 | 3 | 170 HB | 28 % IACS |
Spring hard | Pick for spring contacts and diaphragms needing high elastic limit and low stress relaxation. | 565 | 600 | 3 | 180 HB | 28 % IACS |
Extra spring hard | Highest-strength rolled condition — pick only for flat or very lightly formed spring elements. | 593 | 634 | 2 | 188 HB | 28 % IACS |
What is C41300?
C41300 is a low-zinc tin brass — copper-zinc with a tin addition that raises strength and corrosion resistance over plain brasses of similar zinc content — supplied across a wide temper range from OS050 through H10. It is used as strip and wire for stamped and formed electrical parts: the default condition gives 400 MPa yield, 455 MPa tensile, 8% elongation, 130 HB (72 HRB), 28% IACS conductivity and a 180 °C maximum service temperature, with a formability score of 55. It is unleaded, so machinability is only about 30% of free-cutting brass; for screw-machine work choose a leaded brass such as C36000. C41300 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,005°C (1,841 °F). C41300 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 455 MPa (66 ksi) — stronger than 80% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 110 GPa (16 Msi).
What is C41300 used for?
- electrical connectors
- springs
- terminals
Advantages
- High strength — 400 MPa (58 ksi), better than 80% of copper alloy grades
Limitations
- Limited ductility — 8%, worse than 83% of copper alloy grades
C41300 properties
Typical room-temperature values for C41300-H02; bars are the position among copper alloy grades.
Physical3
C41300 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,005°C (1,841 °F).
Mechanical12
C41300 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 455 MPa (66 ksi) — stronger than 80% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C41300 is rated for continuous service to 180°C (356 °F). It conducts heat at 120 W/m·K (69.3 BTU/hr·ft·°F), better than 66% of copper alloy grades. Thermal expansion is 18.4 µm/m·K (10.2 µin/in·°F).
Electrical3
C41300 conducts electricity at 28 % IACS, better than 69% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C41300 takes about 55 MJ of energy and emits 3.9 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 40%.
Manufacturability7
C41300's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability good (55/100); formability good (55/100).
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. C41300 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C41300
Is C41300 easy to machine?
Unleaded tin brass — gummy, long chips; rate ≈30% of free-cutting brass, use sharp positive-rake tools, high speed and good lubrication.
Can C41300 be welded?
Excellent for soft soldering and brazing; resistance welding good, GTAW/GMAW only fair because of zinc fuming — vent and use Cu-Si or Cu-Sn filler.
Can C41300 be formed, bent or molded?
Excellent cold formability in OS tempers (deep draws, tight bends); in H04 and harder bend with grain and generous radii, and stress-relieve at ~250–275 °C to avoid ammonia SCC.
C41300 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 |
|---|---|---|
| CuCu + named elements ≥ 99.7% (Ag countable as Cu) | 89 – 93 | 91 |
| Sn | 0.7 – 1.3 | 1 |
| Pbimpurity limit | ≤ 0.1 | |
| Feimpurity limit | ≤ 0.05 | |
| Znremainder, nominally ~8% | balance |
What surface finishes work on C41300?
Takes bright polish, tin, nickel, silver and gold plating readily; no anodizing — use lacquer or benzotriazole passivation to prevent tarnish.
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).
How much does C41300 cost?
C41300 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.
C41300 — frequently asked
What is C41300 used for?
C41300 is typically used for electrical connectors, springs and terminals. In short: tin brass connector strip; formable at 400 MPa yield; not free-cutting.
What is the yield strength of C41300?
C41300 has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 455 MPa (66 ksi) — stronger than 80% of copper alloy grades. Strength varies by condition: see the 10 listed tempers.
Is C41300 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Unleaded tin brass — gummy, long chips; rate ≈30% of free-cutting brass, use sharp positive-rake tools, high speed and good lubrication.
Can C41300 be welded?
Yes — weldability is rated good (55/100). Excellent for soft soldering and brazing; resistance welding good, GTAW/GMAW only fair because of zinc fuming — vent and use Cu-Si or Cu-Sn filler.
What surface finishes work on C41300?
Takes bright polish, tin, nickel, silver and gold plating readily; no anodizing — use lacquer or benzotriazole passivation to prevent tarnish.
Can C41300 be formed, bent or molded?
Excellent cold formability in OS tempers (deep draws, tight bends); in H04 and harder bend with grain and generous radii, and stress-relieve at ~250–275 °C to avoid ammonia SCC.
What is the maximum service temperature of C41300?
C41300 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 C41300-H02 and C41300-OS050?
H02 is the default condition — most stocked general-purpose temper — good balance of strength and bendability for terminals, clips and washers. OS050: softest commercial temper — pick for deep drawing, severe forming and re-drawn parts. Yield strength is 400 MPa in H02 versus 117 MPa in OS050.
How much does C41300 cost?
C41300 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
- ASTM B36/B36M — Brass Plate, Sheet, Strip, and Rolled Bar — ASTM International (2018)
- ASTM B587 — Welded Brass Tube — ASTM International (2020)
- CDA Alloy Database — C41300 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; 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.