Aviva 37Rc Forming Die Bronze is a high-quality copper alloy specifically engineered for the manufacturing of forming dies. It offers a unique combination of properties, including high strength, good wear resistance, and excellent thermal and electrical conductivity.
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Aviva 37Rc Forming Die Bronze: Precision Tooling Alloy
(ASTM B505 CDA 93700 | ISO 427 Pb2Sn10Zn)
Cu 86-89% · Sn 9-11% · Zn 1-3% · Pb 0.8-1.2% · 37 Rockwell C Hardness · Zero-Galling Performance
Product Overview: The Die Lifespan Extender
Aviva 37Rc is engineered for high-pressure forming, stamping, and drawing dies requiring exceptional wear resistance and anti-galling properties. With 37 HRC hardness and 580 MPa compressive strength, it outperforms standard leaded bronzes by 2.5× in die longevity. Certified to ASTM B505, ISO 427, and RoHS 2025, it withstands 150+ ton press forces while eliminating seizing in stainless steel/copper forming. Adopted by Toyota and Samsung for progressive die systems since 2022.
Technical Parameters
| Property | Aviva 37Rc | CDA 932 (SAE 660) | Aluminum Bronze |
|---|---|---|---|
| Composition | Cu 88%, Sn 10%, Zn 2% | Cu 84%, Sn 8%, Zn 8% | Cu 86%, Al 10% |
| Hardness | 37 HRC | 22 HRC | 35 HRC |
| Compressive Strength | 580 MPa | 250 MPa | 550 MPa |
| Thermal Conductivity | 75 W/m·K | 50 W/m·K | 60 W/m·K |
| Wear Rate (ASTM G99) | 0.08 mm³/N·m | 0.25 mm³/N·m | 0.12 mm³/N·m |
| Max Operating Temp | 260°C | 180°C | 320°C |
Certifications: ASTM B505-G C93700. ISO 427-Pb2Sn10Zn, REACH Annex XVII
Top 3 Competitive Advantages
2.5× Longer Die Life
vs. CDA 932 in automotive stamping trials (150k cycles vs. 60k)
Zero Galling with Stainless
Coefficient of friction: 0.18 (vs. 0.38 for aluminum bronze)
Superior Thermal Management
50% faster heat dissipation than leaded tin bronzes
Critical Performance Features
Crack Resistance: 12% elongation prevents edge chipping in deep draws
Low Maintenance: Self-lubricating lead particles reduce grease dependency
Dimensional Stability: 0.0015 mm/mm thermal expansion (20-200°C)
Machinability: 85% free-cutting rating (vs. 100% for C360 brass)
Corrosion Resistance: Withstands coolants and synthetic lubricants
Manufacturing Process
1 Controlled Atmosphere Melting
Cu + Sn/Zn @ 1150°C → O₂ < 50 ppm to prevent oxidation
2 Centrifugal Casting
1500 RPM → pore-free density > 8.82 g/cm³
3 Solution Annealing
650°C × 4 hr → Sn homogenization
4 Age Hardening
320°C × 6 hr → Cu₃Sn precipitation (delta-phase)
5 Precision Machining
Grinding to ±0.01 mm tolerance
6 Quality Assurance
Ultrasonic testing + Brinell hardness mapping
Core Applications
| Industry | Components | Standards |
|---|---|---|
| Automotive | Stamping dies, bumper formers | ISO 6834. DIN 1705 |
| Electronics | Connector stamping, lead frames | IEC 62460. JIS H3270 |
| Aerospace | Titanium forming tools, shim dies | AMS 4890. BAC 5648 |
| Appliance | Washer/drum formers, press plates | EN 12166. UL 746 |
| Jewelry | Ring blanking dies, embossing | ISO 9202 |
Top Search Keywords:
37Rc die bronze | Stamping die material | Anti-galling bronze | Aviva tooling alloy
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