Harada JIS C5191HQ Phosphor Bronze – High Strength, Bendable, Hot‑Dip Tin Plated

Due to the global trend toward smaller and thinner electronic components, demand for phosphor bronze with higher strength and bendability has been increasing as the base material. To meet such needs, Harada has added a newly developed material to its products line-up, a high quality phosphor bronze (HQ).

This grade can be hot-dip tin plated.

Properties

General

Property	Value
Relative density	8.82 [-]

Mechanical

Property	Value	Comment
Bendability 90°, bw	0 [-]	H Temper
	0 [-]	EH Temper
	1 [-]	SH Temper
Bendability 90°, gw	0 [-]	H Temper
	0 [-]	EH Temper
	1 [-]	SH Temper
Elastic modulus	115 GPa
Elongation	12.7 %	SH Temper
	13.7 %	EH Temper
	22.6 %	H Temper
Flexural modulus	105 GPa
Hardness, Vickers	203 [-]	H Temper
	214 [-]	EH Temper
	222 [-]	SH Temper
Tensile strength	630 MPa	H Temper
	699 MPa	EH Temper
	744 MPa	SH Temper
Yield strength	614 MPa	H Temper \| RP02
	697 MPa	EH Temper \| RP02
	739 MPa	SH Temper \| RP02

Thermal

Property	Value
Coefficient of thermal expansion	1.82e-05 1/K
Melting point	900 - 1040 °C
Specific heat capacity	375 J/(kg·K)
Thermal conductivity	67 W/(m·K)

Electrical

Property	Value
Specific Electrical conductivity	14 % IACS

Chemical properties

Property	Value	Comment
Iron	0.01 %	max.
Lead	0.01 %	max.
Other	99.8 %	min. \| Cu+Sn+P
Phosphorus	0.03 - 0.2 %
Tin	5.5 - 7 %
Zinc	0.01 %	max.

Technological properties

Property

Application areas

The grade is particularly suitable for electronics (connectors, lead frames, lead terminals, transistor terminals, etc.), electrical (relay and switch contacts, rotary switch slides and contacts, fuse clips, etc.), automotive (bearing frames, hydraulic equipment caps, packing, bearings, clutch disks, electrical parts, etc.) and others (bellows, slides, blades, plate springs, corrosion-proof machinery equipment, diaphragms, etc.)

Coating

Standard product specification of a HOT-DIP-tinned strip.

Base material thickness (mm)	0.1~0.8
Plating thickness (μm)	0.7~8.0
Width (mm)	8.0~170
Coil unit weight (kg/mm)	1.0 / 2.0 / 4.0/ 8.0
Coil inside diameter (mm)	250φ / 300φ / 400φ / 500φ
Plating material	Pure tin
Plating base material	Phosphor bronze

*Width means the slit width after plating.

*Different plating thickness for each side is possible.

* We can accommodate our products to individual specifications other than the above standard specifications. Please feel free to call us.

Other

Please contact the supplier if you have any specific requests regarding chemical compostions, mechanical properties, and thickness.

Tolerances

Thickness	Internal Controlled Specification	JIS Standard (H3110,H3130)
0.05∼0.08mm	±0.002	±0.005
0.09∼0.15mm	±0.002	±0.008
0.16∼0.25mm	±0.003	±0.013
0.26∼0.30mm	±0.004	±0.018

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