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USA UNS C42520
Corresponding Standard ASTM B591-2015
Copper-Zinc-Tin and Copper-Zinc-Tin-Iron-Nickel Alloys Plate, Sheet, Strip, and Rolled Bar
Classification Copper and Copper Alloys
Chemical Element Composition Content (%)
Component Fe P Ni Cu Pb Sn More
Minimum Value 0.05 0.01 0.05 88 - 1.5 Zn余量
Maximum Value 0.2 0.2 0.2 91 0.05 3
Mechanical Properties
Tensile Strength
σb
Mpa 		Hardness
HBW
1/2 Hard (H02), 0.51 ≤ t ≤ 0.91 (B-Scale) 460~565 (HR)
68~83
1/2 Hard (H02), t > 0.91 (B-Scale) 460~565 (HR)
70~85
1/2 Hard (H02), 0.30 ≤ t ≤ 0.71 (Superficial 30T) 460~565 (HR)
64~71
1/2 Hard (H02), t > 0.711 (Superficial 30T) 460~565 (HR)
67~73
Hard (H04), 0.51 ≤ t ≤ 0.91 (B-Scale) 560~660 (HR)
82~90
Hard (H04), t > 0.91 (B-Scale) 560~660 (HR)
83~92
Hard (H04), 0.30 ≤ t ≤ 0.71 (Superficial 30T) 560~660 (HR)
71~76
Hard (H04), t > 0.711 (Superficial 30T) 560~660 (HR)
72~78
Superhard (H06), 0.51 ≤ t ≤ 0.91 (B-Scale) 635~740 (HR)
85~94
Superhard (H06), t > 0.91 (B-Scale) 635~740 (HR)
87~96
Superhard (H06), 0.30 ≤ t ≤ 0.71 (Superficial 30T) 635~740 (HR)
72~77
Superhard (H06), t > 0.711 (Superficial 30T) 635~740 (HR)
73~79
Spring (H08), 0.51 ≤ t ≤ 0.91 (B-Scale) 670~770 (HR)
88~96
Spring (H08), t > 0.91 (B-Scale) 670~770 (HR)
90~98
Spring (H08), 0.30 ≤ t ≤ 0.71 (Superficial 30T) 670~770 (HR)
74~79
Spring (H08), t > 0.711 (Superficial 30T) 670~770 (HR)
75~81
Extra spring (H10)，0.51≤t≤0.91 (B-Scale) 710~815 (HR)
91~101
Extra spring (H10)，t＞0.91 (B-Scale) 710~815 (HR)
92~102
Extra spring (H10)，0.30≤t≤0.71 (Superficial 30T) 710~815 (HR)
76~82
Extra spring (H10)，t＞0.711 (Superficial 30T) 710~815 (HR)
77~83

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