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Optimization of Sn and Ni on Comprehensive Properties of Cu-Ni-Sn-P Alloy
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Jiuhui ZHAO, Yufei LIU, Chengyi LIU
Copper Engineering | 2026, (1) : 42 - 47
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Copper Engineering | 2026, (1): 42-47
• Material Preparation and Process Engineering •
Optimization of Sn and Ni on Comprehensive Properties of Cu-Ni-Sn-P Alloy
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Jiuhui ZHAO, Yufei LIU, Chengyi LIU
Affiliations
  • Jiangxi Copper Strip and Foil Corporation Limited，Nanchang 330096，China
Published: 2026-02-28 doi: 10.3969/j.issn.1009-3842.2026.01.004
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In this study, Cu-Ni-Sn-P (C19040) alloy strip materials with different compositions were prepared by horizontal continuous casting followed by multiple cold rolling and heat treatment processes. Effects of Sn and Ni mass fraction variations on the mechanical properties, softening resistance, and thermal contraction of Cu-Ni-Sn-P alloy strip materials were investigated. Results indicated that an increase in Sn mass fraction enhanced mechanical properties and softening resistance of Cu-Ni-Sn-P alloy through solid solution strengthening. However, excessive Sn mass fraction exacerbated Sn segregation, which worsened the thermal contraction behavior. An increase in Ni mass fraction promoted the formation of more Ni-P precipitates, significantly improving the softening resistance. When mass fraction of Sn was 1.5% and that of Ni was 0.85%, the alloy exhibited superior comprehensive properties, with a hardness of 174HV, tensile strength of 565 MPa, elongation of 4.3%, thermal contraction rate of 0.006%, and softening resistance hardness of 141HV. These properties met the requirements for lead frame materials.

Cu-Ni-Sn-P alloy  /  mechanical property  /  softening resistance  /  thermal contraction rate  /  comprehensive property
Jiuhui ZHAO, Yufei LIU, Chengyi LIU. Optimization of Sn and Ni on Comprehensive Properties of Cu-Ni-Sn-P Alloy[J]. Copper Engineering, 2026 , (1) : 42 -47 . DOI: 10.3969/j.issn.1009-3842.2026.01.004
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Year 2026 volume Issue 1
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Article Info
doi: 10.3969/j.issn.1009-3842.2026.01.004
  • Receive Date：2025-04-12
  • Online Date：2026-09-08
  • Published：2026-02-28
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  • Received：2025-04-12
  • Revised：2025-08-02
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    Jiangxi Copper Strip and Foil Corporation Limited，Nanchang 330096，China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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