Harada C5191HQ Phosphor Bronze – High Strength, Bendable, Hot-Dip Tin Plated
Overview
Harada C5191HQ is a high-quality phosphor bronze developed to meet the growing demand for higher strength and superior bendability in miniaturized electronic components. The alloy is specifically designed for hot-dip tin plating, ensuring excellent solderability and corrosion protection for connector and terminal applications.
General Properties
| Property |
Value |
| Density (Relative) |
8.82 g/cm³ |
Mechanical Properties by Temper
| Property |
H Temper |
EH Temper |
SH Temper |
| Tensile Strength (Rm) |
630 MPa |
699 MPa |
744 MPa |
| Yield Strength (Rp0.2) |
614 MPa |
697 MPa |
739 MPa |
| Elongation (A) |
22.6 % |
13.7 % |
12.7 % |
| Vickers Hardness (HV) |
203 |
214 |
222 |
| Bendability 90° (Good Way) |
0 × t |
0 × t |
1 × t |
| Bendability 90° (Bad Way) |
0 × t |
0 × t |
1 × t |
| Elastic Modulus (E) |
115 GPa |
| Flexural Modulus |
105 GPa |
Thermal Properties
| Property |
Value |
| Coefficient of Thermal Expansion |
18.2 × 10⁻⁶ /K |
| Melting Range |
900 – 1040 °C |
| Specific Heat Capacity |
375 J/(kg·K) |
| Thermal Conductivity |
67 W/(m·K) |
Electrical Properties
| Property |
Value |
| Electrical Conductivity (IACS) |
14 % |
Chemical Composition (wt%)
| Element |
Content |
Note |
| Copper (Cu) + Tin (Sn) + Phosphorus (P) |
99.8 min |
Balance |
| Tin (Sn) |
5.5 – 7.0 |
|
| Phosphorus (P) |
0.03 – 0.20 |
|
| Iron (Fe) |
0.01 max |
|
| Lead (Pb) |
0.01 max |
|
| Zinc (Zn) |
0.01 max |
|
Hot-Dip Tin Plating Specification
| Parameter |
Standard Range |
| Base Material Thickness |
0.1 – 0.8 mm |
| Plating Thickness (per side) |
0.7 – 8.0 µm |
| Strip Width (after slitting) |
8.0 – 170 mm |
| Coil Unit Weight |
1.0 / 2.0 / 4.0 / 8.0 kg/mm |
| Coil Inner Diameter |
250 / 300 / 400 / 500 mm |
| Plating Material |
Pure Tin (Sn) |
| Base Material |
Phosphor Bronze (C5191HQ) |
Notes: Width refers to slit width after plating. Differential plating thickness per side available. Custom specifications welcome – contact us.
Thickness Tolerances
| Thickness Range |
Harada Internal Spec |
JIS Standard (H3110, H3130) |
| 0.05 – 0.08 mm |
±0.002 mm |
±0.005 mm |
| 0.09 – 0.15 mm |
±0.002 mm |
±0.008 mm |
| 0.16 – 0.25 mm |
±0.003 mm |
±0.013 mm |
| 0.26 – 0.30 mm |
±0.004 mm |
±0.018 mm |
Harada's internal tolerances are significantly tighter than JIS standards.
Applications
- Electronics: Connectors, lead frames, lead terminals, transistor terminals
- Electrical: Relay/switch contacts, rotary switch slides, fuse clips
- Automotive: Bearing frames, hydraulic caps, packing, bearings, clutch disks, electrical parts
- Industrial: Bellows, slides, blades, plate springs, corrosion-resistant equipment, diaphragms
Custom Requirements
Contact the supplier for specific requests regarding chemical composition, mechanical properties, or thickness.