Ishikawa Metal Co. Ltd is Lead-free solder manufactuer and sales in Osaka

Ishikawa Metal Co.,LTD


Management System
ISO 9001:2015
ISO 14001:2015

  • 7-21 Chikkoh Hamadera Nishimachi Nishi-ku Sakai City, Osaka 592-8352, Japan
  • TEL:072-268-1155 FAX:072-268-1159


Flux cored solder wire

High reliability halogen free standard compliant type HRK series
Good wettability

Adding a special activators other than Cl and Br. Good wettability, while compliant to halogen-free standards.

Excellent wettability

●Soldering test by robot

Good wettability

  • Compare wettability to the back through hole

    Iron temp:350℃
    Soldering time:1 sec
    PCB:Cu, Through-hole

Halogen-free compliant

No intentional addition of chlorine(Cl) and bromine(Br), which causes dioxins.Compliant with most of halogen-free standards.

Halogen-free compliant

●Compliant situation of HRK series

Standards Compliant situation
JPCA-ES01 Compliant
IEC61249-2-21 Compliant
IPC4101B Compliant
JEITA ET-7304A Non compliant

Compatible to major halogen-free standards

Reduce flux spattering

The effect of special activators reduce the spattering and enables to secure a higher quality soldering.

Greatly reduced spattering

●Spattering test by robot

Very few spattering

  • Collect spattered flux onto
    thermal paper.

    Iron temp:380℃
    Feed speed:15mm/s
    Feed lenght:5mm×200 shots

Alloy type J3 (Sn:Bal / Ag 3.0 / Cu 0.5)
R4 (Sn:Bal / Ag 0.3 / Cu 0.7)
R3 (Sn:Bal / Cu 0.55)
Flux type Harogen-free type
Flux contents (%) 2.0%、3.0%、4.0%、6.0%
Halide contents 0.08%~0.50%
Copper plate corrosion test No corrosion
Copper mirror corrosion No corrosion
Insulation resistance(Ω) More than 1.0×108Ω
Electrochemical migration No migration
Halogen contents(ppm) Cl : Less than 50
Br : Less than 100
Flux name HRK

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