Products

Phosphor Bronze
Phosphor Bronze for Springs
HQ Phosphor Bronze with High Strength and Bending Workability

Phosphor Bronze Plates and Strips

*Please contact us if you have any specific requests regarding chemical compositions, mechanical properties, and thicknesses.

Chemical Composition

Alloy No.	Chemical Composition（%）
Alloy No.	Sn	P	Fe	Pb	Zn	Cu+Sn+P
C5050	1.0～1.7	≦ 0.15	≦ 0.10	≦ 0.02	≦ 0.20	≧ 99.5
HRD200	1.7～2.3	≦ 0.15
C5111	3.5～4.5	0.03～0.35
C5102	4.5～5.5
C5191	5.5～7.0
C5212	7.0～9.0

Mechanical Properties

Alloy No.	Temper	Tension Test			Hardness Test
Alloy No.	Temper	Thickness Category ㎜	Tensile Strength N/m㎡	Elongation %	Thickness Category ㎜	Vickers Hardness HV*1
C5050	O	≧ 0.10 ≦ 5.0	≧ 240	≧ 40	－	－
	1/4H	≧ 0.10 ≦ 5.0	240～330	≧ 30	≧ 0.15 ≦ 5.0	60～120
	1/2H	≧ 0.10 ≦ 5.0	330～450	≧ 10	≧ 0.10 ≦ 5.0	90～155
	H	≧ 0.10 ≦ 5.0	390～500	≧ 3	≧ 0.10 ≦ 5.0	120～165
	EH	≧ 0.10 ≦ 5.0	≧ 460	－	≧ 0.05 ≦ 5.0	≧ 140
HRD200	O	≧ 0.10 ≦ 5.0	≧ 300	≧ 30	≧ 0.10 ≦ 5.0	70～115
	1/2H	≧ 0.10 ≦ 5.0	400～500	≧ 10	≧ 0.10 ≦ 5.0	125～165
	H	≧ 0.10 ≦ 5.0	450～550	≧ 5	≧ 0.10 ≦ 5.0	150～185
	EH	≧ 0.10 ≦ 5.0	500～600	≧ 2	≧ 0.10 ≦ 5.0	175～205
	SH	≧ 0.10 ≦ 5.0	600～700	－	≧ 0.10 ≦ 5.0	185～215
C5111	O	≧ 0.10 ≦ 5.0	≧ 295	≧ 38	－	－
	1/4H	≧ 0.10 ≦ 5.0	345～440	≧ 25	≧ 0.15 ≦ 5.0	80～150
	1/2H	≧ 0.10 ≦ 5.0	410～510	≧ 12	≧ 0.10 ≦ 5.0	120～180
	H	≧ 0.10 ≦ 5.0	490～590	≧ 7	≧ 0.10 ≦ 5.0	150～200
	EH	≧ 0.10 ＜ 0.20	570～660	－	≧ 0.05 ≦ 5.0	170～220
	EH	≧ 0.20 ≦ 5.0	570～660	≧ 3	≧ 0.05 ≦ 5.0	170～220
	SH	≧ 0.10 ≦ 5.0	≧ 640	－	≧ 0.05 ≦ 5.0	≧ 200
C5102	O	≧ 0.10 ≦ 5.0	≧ 305	≧ 40	－	－
	1/4H	≧ 0.10 ≦ 5.0	375～470	≧ 28	≧ 0.10 ≦ 5.0	90～160
	1/2H	≧ 0.10 ≦ 5.0	470～570	≧ 15	≧ 0.10 ≦ 5.0	130～190
	H	≧ 0.10 ≦ 5.0	570～665	≧ 7	≧ 0.10 ≦ 5.0	170～220
	EH	≧ 0.10 ＜ 0.20	620～710	－	≧ 0.05 ≦ 5.0	190～230
	EH	≧ 0.20 ≦ 5.0	620～710	≧ 4	≧ 0.05 ≦ 5.0	190～230
	SH	≧ 0.10 ≦ 5.0	≧ 660	－	≧ 0.05 ≦ 5.0	≧ 200
C5191	O	≧ 0.10 ≦ 5.0	≧ 315	≧ 42	－	－
	1/4H	≧ 0.10 ≦ 5.0	390～510	≧ 35	≧ 0.10 ≦ 5.0	100～160
	1/2H	≧ 0.10 ≦ 5.0	490～610	≧ 20	≧ 0.10 ≦ 5.0	150～205
	H	≧ 0.10 ≦ 5.0	590～685	≧ 8	≧ 0.10 ≦ 5.0	180～230
	EH	≧ 0.10 ＜ 0.20	635～720	－	≧ 0.05 ≦ 5.0	200～240
	EH	≧ 0.20 ≦ 5.0	635～720	≧ 5	≧ 0.05 ≦ 5.0	200～240
	SH	≧ 0.10 ≦ 5.0	≧ 690	－	≧ 0.05 ≦ 5.0	≧ 210
C5212	O	≧ 0.10 ≦ 5.0	≧ 345	≧ 45	－	－
	1/4H	≧ 0.10 ≦ 5.0	390～510	≧ 40	≧ 0.10 ≦ 5.0	100～160
	1/2H	≧ 0.10 ≦ 5.0	490～610	≧ 30	≧ 0.10 ≦ 5.0	150～205
	H	≧ 0.10 ≦ 5.0	590～705	≧ 12	≧ 0.10 ≦ 5.0	180～235
	EH	≧ 0.10 ＜ 0.20	≧ 685	－	≧ 0.05 ≦ 5.0	≧ 210
	EH	≧ 0.20 ≦ 5.0	≧ 685	≧ 5	≧ 0.05 ≦ 5.0	≧ 210

Note: The above standards are partially quoted from JIS H3110.
*1 Minimum test force is 1.961N

Thickness Tolerances

C5050・HRD200・C5111・C5102・C5191・C5212（Phosphor Bronze）
Unit：mm

Thickness		Tolerance (width)
Thickness		≦ 400
≧ 0.05	≦ 0.08	±0.005
＞ 0.08	≦ 0.15	±0.008
＞ 0.15	≦ 0.25	±0.013
＞ 0.25	≦ 0.4	±0.018
＞ 0.4	≦ 0.55	±0.020
＞ 0.55	≦ 0.7	±0.025
＞ 0.7	≦ 0.9	±0.030
＞ 0.9	≦ 1.2	±0.035
＞ 1.2	≦ 1.5	±0.045
＞ 1.5	≦ 2	±0.05
＞ 2	≦ 3	±0.06

Note: The above standards are partially quoted from JIS H3110. Double the above values when changing the tolerance from (±) to only (+) or (-)

Phosphor Bronze Plates and Strips for Springs

*Please contact us if you have any specific requests regarding chemical composition, mechanical properties, and thicknesses.

Chemical Composition

Alloy No.	Chemical Composition（%）
Alloy No.	Sn	P	Fe	Pb	Zn	Cu+Sn+P
C5210	7.0～9.0	0.03～0.35	≦ 0.10	≦ 0.02	≦ 0.20	≧ 99.5
C5240	9.0～11.00	0.03～0.35	≦ 0.10	≦ 0.02	≦ 0.20	≧ 99.5

Mechanical Properties

Alloy No.	Temper	Tension Test				Elastic Limit Test of Spring		Hardness Test
Alloy No.	Temper	Thickness Category mm	Tensile Strength N/m㎡	0.2% Yield Strength N/m㎡	Elongation %	Thickness Category mm	Elastic Limit of Spring (Kb0.1) N/m㎡	Thickness Category mm	Vickers Hardness HV*1
C5210	1/2H	≧ 0.10 ≦ 1.6	470～610	≧ 260	≧ 27	≧ 0.15 ≦ 1.6	≧ 245	≧ 0.10 ≦ 1.6	140～205
	H	≧ 0.10 ≦ 1.6	590～705	≧ 450	≧ 20	≧ 0.15 ≦ 1.6	≧ 390	≧ 0.10 ≦ 1.6	185～235
	EH	≧ 0.10 ≦ 1.2	685～785	≧ 580	≧ 11	≧ 0.15 ≦ 1.6	≧ 460	≧ 0.10 ≦ 1.2	210～260
	SH	≧ 0.10 ≦ 1.2	735～835	≧ 640	≧ 9	≧ 0.15 ≦ 1.6	≧ 510	≧ 0.10 ≦ 1.2	230～270
	ESH	≧ 0.10 ≦ 0.40	770～885	≧ 690	≧ 5	≧ 0.15 ≦ 1.6	≧ 560	≧ 0.10 ≦ 0.4	245～285
C5240	H	≧ 0.10 ≦ 1.6	650～750	≧ 510	≧ 11	≧ 0.15 ≦ 1.6	≧ 430	≧ 0.10 ≦ 1.6	200～240
	EH	≧ 0.10 ≦ 0.80	750～850	≧ 630	≧ 9	≧ 0.15 ≦ 1.6	≧ 510	≧ 0.10 ≦ 0.8	230～270
	SH	≧ 0.10 ≦ 0.40	850～950	≧ 750	≧ 5	≧ 0.15 ≦ 1.6	≧ 570	≧ 0.10 ≦ 0.40	250～300
	ESH	≧ 0.10 ≦ 0.40	≧ 950	≧ 870	－	≧ 0.15 ≦ 1.6	≧ 630	≧ 0.10 ≦ 0.40	≧ 270
	XSH	≧ 0.10 ≦ 0.40	≧ 1000	≧ 930	－	≧ 0.15 ≦ 1.6	≧ 700	≧ 0.10 ≦ 0.40	≧ 290

Note: The above standards are partially quoted from JIS H3130.
*1 Minimum test force is 1.961N

Thickness Tolerances

C5210・C5240
Unit：mm

Thickness		Tolerance (width)
Thickness		≦ 400
≧ 0.05	≦ 0.08	±0.005
＞ 0.08	≦ 0.15	±0.008
＞ 0.15	≦ 0.25	±0.013
＞ 0.25	≦ 0.4	±0.018
＞ 0.4	≦ 0.55	±0.020
＞ 0.55	≦ 0.7	±0.025
＞ 0.7	≦ 0.9	±0.030
＞ 0.9	≦ 1.2	±0.035
＞ 1.2	≦ 1.5	±0.045
＞ 1.5	≦ 2.0	±0.050

HQ Phosphor Bronze with High Strength and Bending Workability

As electronic devices and parts become smaller and thinner, the need for high strength and precision in the phosphor bronze as the base material also increases.

To meet these needs, we have established a production system for High Quality phosphor bronze with high bending workability (HQ series) in addition to our existing lineup.

Physical Properties

The HQ series is a phosphor bronze with improved mechanical properties through controlling the machining process. It has the same alloy composition as regular phosphor bronze and its physical properties are maintained.

Alloy No.	C5191	C5210	C5240
Melting Point（Liquidus）	1040℃	1020℃	1000℃
Melting Point（Solidus）	900℃	880℃	845℃
Specific Gravity	8.82	8.80	8.78
Linear Expansion Coefficient	18.2×10^-6 /K	18.2×10^-6 /K	18.4×10^-6 /K
Thermal Conductivity	67 W/m・K	63 W/m・K	50 W/m・K
Electrical Conductivity	14 %IACS	12 %IACS	10 %IACS
Specific Heat	375 J/Kg・K	377 J/Kg・K	375 J/Kg・K
Modulus of Elasticity（Tension）	115 kN/m㎡	110 kN/m㎡	105 kN/m㎡
Modulus of Elasticity（Deflection）	105 kN/m㎡	100 kN/m㎡	100 kN/m㎡

Chemical Composition

【Harada's Management Standard】The chemical composition of the HQ series is the same as conventional phosphor bronze. We make use of its advantages as a specialized manufacturer of phosphor bronze to manage impurities even more strictly.

Specifications	Sn	P	Pb	Zn	Fe	Cu+Sn+P
C5191	5.5～7.0	0.03～0.20	0.01^max	0.01^max	0.01^max	99.8^min
C5210	7.0～9.0	0.03～0.20	0.01^max	0.01^max	0.01^max	99.8^min
C5240	9.0～11.0	0.04～0.20	0.01^max	0.01^max	0.01^max	99.8^min
Standard	―	0.03～0.35	0.02^max	0.20^max	0.10^max	99.5^min

Product Size

HQ phosphor bronze is developed with the below tempers and thicknesses. Please contact us for inquiries about other sizes.

Type	Thickness	Temper
Type	Thickness	H	EH	SH	ESH	XSH
C5191HQ	0.05～0.30mm	○	○	○	―	―
C5210HQ		○	○	○	○	○
C5240HQ		○	○	○	○	○

Mechanical Properties

The below are typical examples of HQ and Harada’s average.

Alloy No.	Temper	Symbol	Tensile Strength　N/m㎡	0.2% Yield Strength　N/m㎡	Elongation　%	Hardness HV	Elastic Limit of Spring　N/m㎡
C5191	H	Standard	590～685	－	8^min	180～230	－
		HQ	630	614	22.6	203	－
		Harada’s average	620	600	17.6	202	－
	EH	Standard	635～720	－	5^min	200～240	－
		HQ	699	697	13.7	214	－
		Harada’s average	690	662	11.0	213	－
	SH	Standard	690^min	－	－	210^min	－
		HQ	744	739	12.7	222	－
		Harada’s average	725	710	8.3	216	－
C5210	H	Standard	590～705	450^min	20^min	185～235	390^min
		HQ	616	569	35.3	197	469
		Harada’s average	615	549	28.6	193	462
	EH	Standard	685～785	580^min	11^min	210～260	460^min
		HQ	721	694	23.2	229	563
		Harada’s average	724	684	17.0	228	554
	SH	Standard	735～835	640^min	9^min	230～270	510^min
		HQ	778	773	13.3	242	632
		Harada’s average	771	756	11.4	240	627
	ESH	Standard	770～885	690^min	5^min	245～285	560^min
		HQ	845	834	9.3	258	648
		Harada’s average	－	－	－	－	－
	XSH *	Standard	835～1000	－	1^min	－	630^min
		HQ	979	968	2.1	285	706
		Harada’s average	－	－	－	－	－
C5240	H	Standard	650～750	510^min	11^min	200～240	430^min
	H	HQ	693	657	25.6	223	558
	EH	Standard	750～850	630^min	9^min	230～270	510^min
	EH	HQ	800	783	15.3	245	585
	SH	Standard	850～950	750^min	5^min	250～300	570^min
	SH	HQ	890	877	9.2	267	661
	ESH	Standard	950^min	870^min	－	270^min	630^min
	ESH	HQ	1000	988	2.4	285	718
	XSH	Standard	1000^min	930^min	－	290^min	700^min
	XSH	HQ	1058	1044	2.0	305	883

Note: The above standards are partially quoted from JIS H3130. Applicable thicknesses are ≥0.05mm and ≤0.3mm.
*Internal standards are shown because the products are not standardized by JIS H3130(2018)

Thickness Tolerances (Common to both HQ series and Harada’s average)

C5240
Unit：mm

Thickness	Our Achievements	Standard
≧ 0.05㎜ ,≦ 0.08㎜	±0.002㎜	±0.005㎜
＞ 0.08㎜ ,≦ 0.15㎜	±0.002㎜	±0.008㎜
＞ 0.15㎜ ,≦ 0.25㎜	±0.003㎜	±0.013㎜
＞ 0.25㎜ ,≦ 0.30㎜	±0.004㎜	±0.018㎜

Note: The above standards are partially quoted from JIS H3130.

ProductsProducts

Products

Phosphor Bronze Plates and Strips

Chemical Composition

Mechanical Properties

Thickness Tolerances

Phosphor Bronze Plates and Strips for Springs

Chemical Composition

Mechanical Properties

Thickness Tolerances

HQ Phosphor Bronze with High Strength and Bending Workability

Physical Properties

Chemical Composition

Product Size

Mechanical Properties

Thickness Tolerances (Common to both HQ series and Harada’s average)

Products
Products