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Introduction of Improved Beryllium Copper (less dimensional changes and variations)

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Less distortion Beryllium Copper (C1720 age hardenable material)

What is the improved material?

This is a new material developed by NGK through special processes for beryllium copper age hardenable material to reduce distortion during heat treatment and improve fatigue strength.

Enabling improvement of manufacturing yield・Reduction of lead time・Stabilization of product performance

The improved material enables your product to improve manufacturing yield, shorten lead time and stabilize performance because of less distortion during age hardening process.

Advantage Benefit
  • Reduction of the variation in distortion during heat treatment distortion.
  • Improvement of fatigue strength.
  • Improvement in productivity (yield and lead time) and quality.

    Contributing to differentiate your product from competitors.

Please feel free to ask us for trial sample.
* The manufacturing upper limit of the improved material is t0.60mm. (Available up to 0.6mm thick)

Reduce the variation in distortion (dimensional changes) during heat treatment. 1.Improvement of production yield 2.Reduction of lead time 3.Stabilization of product performance

Improvement Effect (flat-blade terminal)

Evaluation material
  • Conventional material (C1720R-H)
  • Improved material
Evaluation method
  1. 1Stamp 0.4mm pitch flat-blade as shown in the photo.
  2. 2Measure the variation between the pitch before and after heat treatment (315℃ for 2 hours) on the same pin.
Diagram of evaluation method for 'Flat blade terminal’
The graph shows the pitch variation of flat-blade terminal between conventional and improved material. The improved material can reduce the variation (6σ) in the horizontal direction by 50%.

Improvement Effect (Bending terminal)

Evaluation material
  • Conventional material (C1720R-H)
  • Improved material
Evaluation method
  1. 1Bend the material as shown in the photo
  2. 2Measure the angular variation before and after heat treatment (315℃ for 2 hours) on the same pin.
Diagram of evaluation method for 'Bending terminal'.
The graph shows the angular variation of bending terminals between conventional and improved material. The improved material can reduce the angular variation by 50%.

Improvement of Fatigue Strength

The graph comparing conventional material and improved material in the bilateral bending fatigue test; the improved material shows approximately double the fatigue performance.

Product specifications

Properties of Improved material compared to Standard material
  Designation4) Tensile Strength1) (N/mm2) 0.2%Yield Strength1) (N/mm2) Elongation1)(%) Vickers Hardness1)(HV) Electrical Conductivity2)(%IACS) Precipitation-Heat-Treatment
(℃×hr)
Standard
material		 C1720P-O
C1720R-O		 410-540 — min. 35 90-160 — —
C1720P-OT
C1720R-OT		 1100-13803) min. 960 min. 3 350-400 min. 22 3hr.at 315℃
C1720P-1/4H
C1720R-1/4H		 510-620 — min. 10 145-220 — —
C1720P-1/4HT
C1720R-1/4HT		 1180-14003) min. 1030 min. 2 360-430 min. 22 2.5hr.at 315℃
C1720P-1/2H
C1720R-1/2H		 590-695 — min. 5 180-240 — —
C1720P-1/2HT
C1720R-1/2HT		 1240-14403) min. 1100 min. 2 370-440 min. 22 2hr.at 315℃
C1720P-H
C1720R-H		 685-835 — min. 2 210-270 — —
C1720P-HT
C1720R-HT		 1270-14803) min. 1140 min. 1 380-450 min. 22 2hr.at 315℃
Improved
material		 C1720P-OK
C1720R-OK		 410-540 — min. 35 90-160 — —
C1720P-OKT
C1720R-OKT		 1100-13803) min. 960 min. 3 350-400 min. 22 3hr.at 315℃
C1720P-1/4HK
C1720R-1/4HK		 510-620 — min. 10 145-220 — —
C1720P-1/4HKT
C1720R-1/4HKT		 1180-14003) min. 1030 min. 2 360-430 min. 22 2.5hr.at 315℃
C1720P-1/2HK
C1720R-1/2HK		 590-695 — min. 5 180-240 — —
C1720P-1/2HKT
C1720R-1/2HKT		 1240-14403) min. 1100 min. 2 370-440 min. 22 2hr.at 315℃
C1720P-HK
C1720R-HK		 685-835 — min. 2 210-270 — —
C1720P-HKT
C1720R-HKT		 1270-14803) min. 1140 min. 1 380-450 min. 22 2hr.at 315℃
  1. 1Values are applicable to thickness 0.1mm and over.
  2. 2Electrical conductivity is for design guidance only.
  3. 3The upper limits of tensile strength after age hardening are for design guidance only.
  4. 4P and R in column "Designation" represent "strip cut to length" and "strip in coils".

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Laws and regulations governing beryllium copper alloy and beryllium

As alloys contain beryllium, these products may be subject to safety and environmental regulations. Read a summary of the current regulations in existence around the world and in Japan.
  • *Our products and industrial standards listed on this page are used for the purpose of convenience to indicate our products and their correspondence with the standards. They do not imply that the materials or our testing methods conform to or comply with the standards.

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