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Technical Specifications
Alloy	Description	Temper	Tensile Strength N/mm2	% Elongation	Vickers Hardness HV
PB I	Phosphor Bronze	Anneal ¼ Hard ½ Hard Hard E Hard S Hard	30 - 34 34 - 46 46 - 54 54 - 62 62 Min 64 Min	40 Min 30 Min 8 Min 4 Min - -	80 Max 100 Min 150 Min 180 Min 190 Min 200 Min
PB II	Phosphor Bronze 5% Sn	Anneal ½ Hard Hard E-Hard E Hard S Hard	31 - 35 35 - 48 48 - 57 57 - 64 65 Min 68 Min	45 Min 35 Min 10 Min 4 Min - -	85 Max 110 Min 160 Min 180 Min 200 Min 215 Min
PB III	Phosphor Bronze 6% Sn	Anneal ½ Hard Hard E-Hard E Hard S Hard	32 - 38 38 - 49 49 - 59 59 - 65 66 Min 68 Min	50 Min 40 Min 12 Min 6 Min - -	90 Max 115 Min 170 Min 200 Min 215 Min 220 Min
PB IV	Phosphor Bronze 8% Sn	Anneal ½ Hard Hard E-Hard E Hard S Hard	34 - 39 39 - 49 49 - 59 59 - 69 69 Min 72 Min	50 Min 40 Min 30 Min 8 Min 5 Min -	95 Max 100 Min 170 Min 200 Min 220 Min 230 Min

Chemical Compositions
Cu + Sn + P %	Pb	Fe	Sn	Zn	P	Available Forms	Application
99.5 Min	0.03 Max	0.05 Max	3.5 - 4.5	-	0.03-0.35	Strips, Foils Sheets	Connectors, Clip for Electrical switches, Switch components Precious Valves, Pinion, Flat springs, Relay of electronics, Stampings, Auto Electricals
99.5 Min	0.03 Max	0.05 Max	4.5-5.5	0.03 Max	0.03-0.35
99.5 Min	0.03 Max	0.05 Max	5.5-7.0	0.03 Max	0.03-0.35
99.5 Min	0.03 Max	0.10 Max	7.0 - 9.0	0.02 Max	0.03-0.35

International Standards for Phosphor Bronze
Alloy	German DIN	ISO	USA ASTM	U.K.BS	France NF	Switzerland SN/VSM	Italy UNI	Spain UNE	Sweden SIS	Japan JIS
PB I PB II PB III PB IV	CuSn4 CuSn5 CuSn6 CuSn8	CuSn4 CuSn5 CuSn6 CuSn8	C-51100 C-51000 C-51900 C-52100	PB 101 PB 102 PB 103 PB 104	CuSn4P CuSn5P CuSn6P CuSn8P	- CuSn5 CuSn6 CuSn8	CuSn4 - CuSn6 CuSn8	C-7120 C-7130 C-7140 C-7150	- - 5428 5431	C5111 C5102 C5191 C5212