MSP1
High conductivity copper alloy

It has been widely used as a copper alloy for terminals, and the stable quality, characteristics , and the supply system thereof are preferred by many users. It is our No. 1 global alloy which has acquired CDA No. and has a supply system in 3 poles (North America, Europe, Asia). It can be applied to EV and PHEV which require high voltage as a high voltage terminal.

Positioning of Alloy

Magnesium solid solution strengthened copper alloy has been successfully mass-produced by its own manufacturing technology. It has been actively used in all industries and members all over the world by exhibiting the necessary properties of terminal materials and spring materials such as electrical conductivity, strength, bending workability, stress relaxation property, etc. in a well-balanced manner.

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Main features

  • 1) Good electrical conductivity and strength
  • 2) Excellent stress relaxation characteristics
  • 3) Excellent stress corrosion cracking resistance
  • 4) Excellent fatigue characteristics
  • 5) Excellent migration resistance
  • 6) Possible to perform reflow Sn plating excellent in surface gloss and whisker resistance

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Main purposes of use

  • Automobile terminal, relay movable piece, spring material for contact, bus bar module,
    lithium ion battery, fuse terminal, small switch, junction box, relay box, breaker, battery terminal

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Chemical composition

The chemical components of MSP1 are as follows.

(Weight %)
Mg P Cu
0.7 0.005 Rem.

* Including inevitable impurities and trace additive elements

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Physical properties

The physical properties of MSP1 are as follows.

Property Representative Value
Specific Gravity 8.8
Coefficient of Thermal Expansion
×10-6/K(20~300℃)
17.3
Thermal Conductivity
W/(m・K)(20℃)
264
Volume ResistivityµΩm 0.0273
Electrical Conductivity(%IACS) 63
Modulus of Elasticity(kN/mm2 125

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Mechanical properties (Actual example: LD direction)

The mechanical properties of MSP1 are as follows.

  Provisional Practical Sample
1/4H 1/2H H EH SH 1/4H 1/2H H EH
Tensile Strength
[N/mm2]
365~450 420~510 480~570 540~630 590 min. 399 459 530 585
0.2% Yield Strength
[N/mm2]
300~410 370~480 440~550 490~620 540 min. 328 432 494 560
Elongation
[%]
15 10 7 5 - 25.1 14.6 10.7 7.7
Elastic Limit
Kb0.1[N/mm2]
- 325 min. 375 min. 390 min. 410 min. 290 349 397 424
Vickers Hardness*
[HV]
90~140 120~170 150~190 170~210 180 min. 126 144 162 178
  Provisional
1/4H 1/2H H EH SH
Tensile Strength
[N/mm2]
365~
450
420~
510
480~
570
540~
630
590 min.
0.2% Yield Strength
[N/mm2]
300~
410
370~
480
440~
550
490~
620
540 min.
Elongation
[%]
15 10 7 5 -
Elastic Limit
Kb0.1[N/mm2]
- 325 min. 375 min. 390 min. 410 min.
Vickers Hardness*
[HV]
90~
140
120~
170
150~
190
170~
210
180 min.
  Practical Sample
1/4H 1/2H H EH
Tensile Strength
[N/mm2]
399 459 530 585
0.2% Yield Strength
[N/mm2]
328 432 494 560
Elongation
[%]
25.1 14.6 10.7 7.7
Elastic Limit
Kb0.1[N/mm2]
290 349 367 424
Vickers Hardness*
[HV]
126 144 162 178

* Including inevitable impurities and trace additive elements

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Heat resistance

The heat resistance of MSP1 is shown on the right.

The heat resistance of MSP1 has sufficient ability as terminal material and spring material. It is especially suitable as an alternative to phosphor bronze.

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Characteristics of stress relaxation resistance

The stress relaxation characteristics of MSP1 are shown on the right.

MSP1 has excellent stress relaxation characteristics among copper alloys and has extremely high reliability as a terminal material.

chart

  • Exposure temperature: 150℃ (vertical to the rolling
    direction)
  • Bending stress: 0.2% yield strength 80%

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Bending workability

The bending workability of MSP1 is as follows.

Temper Sampling
Direction
Bending Inside Radius (mm) R Evaluation
R/t
(to the rolling
direction)
0.0 0.1 0.125 0.15 0.2 0.25 0.4 0.6 0.8 1.0
1/2H
Good way
0.00
90°
Bad way
0.00
H
Good way
0.00
90°
Bad way
0.33
EH
Good way
0.00
90°
Bad way
0.83

Evaluation method: ◎ good (pass), ○ small rough skin (pass), △ rough skin (pass), ▲ small crack (fail), ✕ large crack (fail)

MSP1 not only has excellent balance of strength and conductivity but also good bending workability, and thus can contribute to miniaturization of various parts.

90度W曲げ
JCBA T307:2007 Sample size: Width 10mm×Length 30mm Load: 9807N
Temper 1/2H H EH
Sampling
Direction
(to the rolling
direction)
G.W. B.W. G.W. B.W. G.W. B.W.
Bending
Inside
Radius
(mm) R
0
0.1
0.125
0.15
0.2
0.25
0.4
0.6
0.8
1.0
Evaluation R/t 0.00 0.00 0.00 0.33 0.00 0.83

Evaluation method: ◎ good (pass), ○ small rough skin (pass), △ rough skin (pass), ▲ small crack (fail), ✕ large crack (fail)

MSP1 not only has excellent balance of strength and conductivity but also good bending workability, and thus can contribute to miniaturization of various parts.

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Characteristics of fatigue

The fatigue characteristics of MSP1 are shown on the right.

MSP1 has the highest fatigue characteristics as a spring material since it can by used a number of times until to be broken.

chart

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Inquiry

Sales Headquarters Sales Dept. Ⅰ

  • Group Ⅰ+81-3-6629-5861+81-3-6629-5845

Sales Headquarters Sales Dept. Ⅱ

  • Group Ⅰ+81-72-233-9240+81-72-227-6590

Please inquire here for any questions.

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