Copper Alloy C41300-H04
Supply condition
UNS C41300
H04 = full hard
Pick for flat stamped springs and contacts with only gentle forming, where high yield matters.
Values for the H04 condition
Other C41300 tempers and conditions
C41300 is listed in 10 conditions; see the grade overview at C41300.
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 |
H04This page 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-H04?
C41300-H04 is C41300 supplied in the H04 condition — pick for flat stamped springs and contacts with only gentle forming, where high yield matters. C41300-H04 has a yield strength of 483 MPa (70.1 ksi) and a tensile strength of 524 MPa (76 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 4% and the elastic modulus is 110 GPa (16 Msi). C41300-H04 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). H02 is the default condition FabDigit quotes; H04 is available on request or by drawing note.
Advantages
- High strength — 483 MPa (70.1 ksi), better than 88% of copper alloy grades
Limitations
- Limited ductility — 4%, worse than 96% of copper alloy grades
- Limited service temperature — 165°C (329 °F), worse than 92% of copper alloy grades
C41300-H04 properties
Typical room-temperature values for C41300-H04; 12 are specific to this condition. Other listed values are C41300 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C41300-H04 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-H04 has a yield strength of 483 MPa (70.1 ksi) and a tensile strength of 524 MPa (76 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 4% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C41300-H04 is rated for continuous service to 165°C (329 °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-H04 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-H04 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-H04's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability good (55/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C41300-H04
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.
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.
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 | — |
C41300-H04 — frequently asked
What is C41300-H04 used for?
C41300-H04 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-H04?
C41300-H04 has a typical yield strength of 483 MPa (70.1 ksi) and a tensile strength of 524 MPa (76 ksi) — stronger than 88% of copper alloy grades. Strength varies by condition: see the 10 listed tempers.
Is C41300-H04 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-H04 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-H04?
Takes bright polish, tin, nickel, silver and gold plating readily; no anodizing — use lacquer or benzotriazole passivation to prevent tarnish.
Can C41300-H04 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-H04?
C41300-H04 is rated for continuous use to about 165°C (329 °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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.