Excellent paint adhesion; a high grade coating made by electroplating; compatibility with Toyo Kohan’s unique 0.11 mm thin sheet; and high processability of the substrate are combined, and since its launch it has continued to receive customer support and favorable reviews.

A dense phosphate treatment layer provides excellent paintability and adhesion for various rubbers, linings, and various paints.

 

 

 

Amid the sharp rise in various material prices and the pressure from end customers to cut costs, we promote high strength steel plates from Toyo Kohan, Japan. They are suitable for various surface treated steel sheets. Among these, high strength steel plates have the highest share and can replace copper foil, nickel silver, phosphor bronze foil, stainless steel, and other materials, enabling customer cost reduction.
Among them, TM32 C offers good solderability; because the material contains no tin, it does not produce tin whiskers; it has corrosion resistance; the base material requires no electroplating and therefore poses no environmental concern; it is high strength; and it meets requirements for electronic components such as lead free soldering, non active flux, high surface conductivity, and high coverage capability.

※ The best solution to replace high priced nickel silver and electroplated stainless steel.

As a lead free, weldable high strength steel plate, it has good weldability compatible with lead free soldering and inactive flux; and since it contains no tin, tin whiskers do not occur. It provides the high shielding required by electronic parts and has EMI suppression characteristics.

◆ This material can be soldered directly onto printed circuit boards.
◆ The best material choice to replace high priced nickel silver.
◆ The surface contact impedance is low and thus usable for grounding. (Surface impedance at a distance of 200 mm is about 0.3 Ω.)

 

 

A shielding cover is a tool used to shield electronic signals. It is a key component for reducing radiation from parts. Applied in many electronic products, it can effectively reduce mutual interference between modules—for example, shielding and isolating between the main control module, power module, Wi Fi module, etc.

In the SGS test, solder wicking is taken as 95%.

1. Electrical Conductivity

◆ Surface resistance: easily conductive using a commercial tester. (Measured value: about 10⁴–10⁵ Ω)
※ Compared with existing conductive products, it has extremely high stability value.
◆ Contact resistance: the resistance value of the steel plate as the base material. (When plate thickness is 0.2 to 1.2 mm, about 15 to 150 μΩ <JIS K7194>.)

	Reference Measurement Values
Surface Resistance (Four probe method)	≤ 0.5 mΩ
Interlayer Resistance （JIS C 2550）	≤ 10 Ω·cm² per piece

2. Thermal Emissivity

◆ Thermal emissivity: shows ε equivalent to high heat dissipation steel TM33. (Emissivity ε = 0.65–0.70)
※ TM33: the current top grade form with high corrosion resistance and thermal emissivity and a black appearance.

3. Appearance

◆ Black appearance: has the same blackness as color coated steel sheets. (L*: 30 or less)
◆ Low reflectance: strong diffuse effect with a typical matte appearance.

４.Film performance：

Dynamic friction coefficient 0.15–0.18.

Alloy Number	Composition %				Mechanical Properties
	C	Mn	P	S	Tensile Strength	Elongation	Hardness
	x100	x100	x1000	x1000	N/㎟	%	HV
TM33B	5	162	11	4	539	23	152
TM33C	18	179	10	2	848	11	215

◆ Suitable for bending, curling, deep drawing, stamping, inner edge flanging, etc., meeting the processing needs of small parts.
◆ Further improves corrosion resistance and paint adhesion.
◆ Using pre plated steel sheets allows omitting post plating, e coating, and baking processes at the client side.