PB103 - BS 2870-1980

Grade	PB103
Corresponding Standard	BS 2870-1980 Rolled Copper and Copper Alloys: Sheet, Strip and Foil
Classification	Copper and Copper Alloys

PB103 Chemical Element Composition Content (%)

Component	P	Pb	Zn	Sn	Other Total	More
Minimum Value	0.02	-	-	5.5	-	Cu:余量
Maximum Value	0.4	0.02	0.3	7.5	0.5	Cu:余量

"Other individual elements or other totals": The chemical composition includes elements not specified in the table. Analysis should only be conducted if these elements are suspected to be present, or if routine analysis suggests that their content may exceed the prescribed limits.

PB103 Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
t≤10	Annealing O	≥340（B≤450） ≥340（B＞450）	-	≥50	HV ≤90
t≤10	1/4H	≥385（B≤450） ≥385（B＞450）	≥200（B≤450） ≥200（B＞450）	≥40	HV ≥115
t≤10	1/2H	≥525（B≤450） ≥460（B＞450）	≥440（B≤450） ≥380（B＞450）	≥12	HV ≥170（B≤450） ≥150（B＞450）
t≤6	H	≥620（B≤450） ≥540（B＞450）	≥550（B≤450） ≥480（B＞450）	≥6	HV ≥200（B≤450） ≥165（B＞450）
t≤6	EH	≥695（B≤450）	≥650（B≤450）	-	HV ≥215（B≤450）
t≤0.9	SH	-	-	-	HV: 220~240 （B≤150）
t≤0.6	ESH	-	-	-	HV ≥240（B≤150）

• 1/4H、1/2H、H、EH—The various harder tempers produced by cold rolling. For certain of the materials in this standard, these tempers may be produced by partial annealing.
• SH、ESH—Spring hard tempers produced by cold rolling of thinner material.
• W—Material that has been solution heat treated and will respond effectively to precipitation treatment.
• W（1/4H）、W（1/2H）、W（H）—Material that has been solution heat treated and subsequently cold worked to various harder tempers.
• W（1/4H）P、W（1/2H）P、W（H）P—Material that has been solution heat treated, cold worked and then precipitation treated.
• Wm—Mill-hardened material. Material that has been heat treated by the manufacturer and does not require further heat treatment. Designations for mill-hardened material are not necessarily indicative of the method of manufacture.
• W（1/4H）m、W（1/2H）m、W（H）m、W（EH）m、W（ESH）m—solution heat treatment and cold worked 1/4 hard and mill-hardened state, requiring no additional processing.

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