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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

Custom Requirements

Contact the supplier for specific requests regarding chemical composition, mechanical properties, or thickness.

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