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Home , Chrome plating, Spring steel

[Materials] [Materials] Varieties and Applications 2 Types and Apparent Colors of Surface Treatment

4. Materials Q Types of Surface Treatment

Vickers Layer Applicable Type Material Code Applications Comment JIS Square Bar Hexagonal Bar Round Bar Plate Name Hardness Thickness Example Purpose, Features Reference (HV) (μm) Materials For Regular Sheet Machining Used in high strength and Brass Plate C28000 Brass Name Plates and Instrument Panels ductile sliding parts. Brass JIS H 3100 Good Thin ·Antirust, low price. Zinc − 3~20 Steel Plate Wire ·Poor appearance. − Free-Cutting Brass C3604 BD General turming bolts (Extruded Bar) Brass (JIS) screws, nuts, etc. Good Machinability JIS H 3250 Good Good Good Chromate Plating − 1~2 Steel Plate Work ·Antirust, low price. Bolts and Nuts. ·Fit for mass production. ·Poor appearance, however, − 5. Cast and Forged Products, Copper Alloy Castings Bright Chromate − 1~2 Steel − works instead of plating. Type Material Code Applications Comment JIS Trivalent Chromate − 1~2 Steel Bolts and Nuts ·Antirust, low price. − Gray , Class3 Alloy Cast Iron Class No. 30 − JIS G 5501 ·Do not contain hexavalent chrome. Gray Cast Iron, Class4 Alloy Cast Iron Class No. 35 Cast Machine Parts − JIS G 5501 ·Improvement of resistance and decoration ·Copper base plating as Nickel Plating − − ·Chrome plating has more corrosion appropriate. Spheroidal Cast Iron, Class4 JIS-FCD600 − JIS G 5502 resistance in the atmosphere. ·Not applicable to deep indentations. Bearings, sleeves, bushings High pressure resistance and abrasion resistance, Steel Bronze Casting, Class 6 JIS-BC6 JIS H 5111 Class 1 Plating Copper − ·Better appearance than Class 3 plating. ·Material…Buff…UPlating…Buff and general machine parts. and good machinability. 500 5~20 Class 3 Plating Brass − ·Material…Plating ·Fatigue resistance. ·Material…Satin finish…Plating 6. Steel Pipe Materials Satin Finish Plating − − ·Minor flaws remain inconspicuous.

Type Material Code Applications Comment JIS ·Approx.10 times more expensive Electroless Steel than nickel plating. 500 Parts Unsuitable ·Easy film thickness control. Steel Pipe White Pipe (Zinc Galvanic) At ambient temperature(Gas pipe). Nickel Plating for Nickel Plating. for Ordinary Piping SGP Black Pipe (No Plating) Piping Parts A is metric specification. B is inch specification. JIS G 3452 Copper ·High corrosion resistance, abrasion resistance. Specifiable ·Give Conductivity to Non- − Aluminum Alloy Pipe for JIS-STPG370 Operation temperature 350˚C. Glass Piping Parts JIS G 3454 ·Same as the features of Machine Pressure Service (JIS STPG38) A is metric specification. B is inch specification. Kanigen Plating Up to Plastic Parts hardened electroless nickel plating. 1000 after Plating. ·Can be hardened by heat treatment after plating. Carbon Steel Pipe for General Machine Machine Structural Use JIS-STKM Parts Hollow Shafts. Available for class 11 to class 20. JIS G 3445 ·Appearance with gloss ·Nickel base plating ·Good corrosion resistance as appropriate. Seamless Brass Pipe Chrome Plating − − JIS-C22700T − Easy Flaring, Bending, JIS H 3300 ·Sliding chrome plating surfaces ·Not applicable to deep (Regular class) Wringing and Plating are easy to stick together. indentations. − Class 1 Plating Steel ·Better appearance than Class 3 plating. ·Material…Buff…UPlating…Buff 500 5~20 Copper 7. Spring Materials Class 3 Plating Brass − ·Material…Plating Satin Finish Plating − − ·Fatigue resistance. ·Material…Satin finish…Plating Type Material Code Applications Allowable Operating Temperature ˚c JIS ·Minor flaws remain inconspicuous.

Spring Steel (ASTM High strength, homogenous cold-drawn wire. Hard 1000 10~30 Cylinder Liners ·Excellent abrasion resistance. ·Material…Plating Piano Wire A228) SWP-8 For high quality springs and forming. 110 JIS G 3522 Chrome Plating ·More expensive than other chrome plating. (Class 3 Plating) ·Base coating. Black Oxide Bolts JIS-SWB Applicable to universal stress. 110 − − Steel Nuts ·Appearance(with gloss). ·General Black Oxide For low priced springs and forming. (Blackening) Instruments · more easily than Tufftride Hard Steel Wire JIS G 3521 Steel Items requiring high precision, ·Long term antirust performance. ·Low-Temperature Preliminary JIS-SWC For high quality springs and forming. 110 Low Temperature Treatment. No thermal effect on raw − 1~2 Copper items requiring higher corrosion ·High corrosion resistance. Black Chrome Plating material. Parts coupled with plastic Carbon Steel for Spring Oil Tempered Wire JIS-SWO-A Hardening and tempered. Stainless Steel resistance than blackening. ·Ultra thin film. matter, rubber, etc. Oil Tempered Steel Wire JIS SWO-B For general-purpose springs. 120 JIS G 3560 Clear − 3~5 ·Corrosion and abrasion resistance. ·Some anodize pieces are colored Carbon Steel for Valve-Spring Oil Tempered Wire. Hardening and tempered. Anodize Aluminum Alloy − ·No electric conductivity. through fine holes in the hard, JIS-SWV With a fine surface and uniform tensile 120 JIS G 3561 ·Heat Resistance oxidized film formed on the surface. Oil Tempered Steel Wire strength Black − 5~10 Cr-V Steel for Valve-Spring Hardening and tempered. Oil Tempered Steel Wire JIS-SWOCV-V Loads and slightly high Temperatures. 220 JIS G 3565 Q Apparent Colors of Surface Treatment Ci-Cr Steel for Valve-Spring Hardening and tempered. JIS-SWOSC-V 245 JIS G 3566 Oil Tempered Steel Wire Loads and slightly high Temperatures. Bright Chromate Trivalent Chromate Electroless Nickel Plating Hard Chrome Plating 302 Stainless Steel For general corrosion and heat resistance (WPA) (WPB) Available for magnetic spring. 290 316 Stainless Steel Heat Resistance is good. Higher corrosion resistance than SUS302. For Springs (WPA) (WPB) Available for magnetic spring. 290 Stainless Steel Wire JIS G 4314 Precipitation hardening after spring processing. 631 Stainles Steel- Black Oxide Anodize(Clear) Anodize(Black) WPC High strength and general corrosion resistance. 340 Available for magnetic spring.

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