Hot-dip Galvanized Steel Sheets

Eco-Frontier Series
Inorganic Chromate-free Coated Hot-dip Galvanized Steel Sheet JM

Optimum inorganic chromate-free coating for hot-dip zinc-coated steel sheets

Characteristics

Excellent corrosion resistance: No corrosion after 72 hrs. SST tested by a flat panel
Stable coating appearance after heating: Minimum coating deterioration after heating
Good spot weldability: Same electrode life as conventional chromate coating*

Corrosion resistance

(Salt spray test)

	Chromate-free JM	Chromate C
After 72 hrs. SST tested by a flat panel

Appearance after high temperature heating

*Coating itself is damaged
by high temperature heating.

Weldability

(Suitable current range)

*ptimum current is different from conventional
chromate coat.
Current adjustment is required for JM coat.

Structure of coating

Chromate-free coating with excellent corrosion resistance and superior weldability ¹⁾

1) Surface resistance of JM is higher than that of conventional chromate coat.Please confirm the conductivity of JM.

Applications

Chassis for electrical appliances, etc.
Small parts for general applications

Available product size range of “JM”, commercial quality

Remarks; More information is available on other quality.

Steel grade

Zinc coating weight (Top side/Bottom side)

Chromate-free chemical treatment :
JM=Hot-dip zinc-coated steel sheet base

Zn coating: GZ=JFE GALVAZINC=JFE hot-dip zinc-coated steel sheets

Classification:	(JIS Standard)	C=Commercial quality, D1=Drawing quality, class 1, D2=Drawing quality, class 2, D3=Drawing quality, class 3
	(JFE Standard)	B=Commercial quality, C=Forming quality, D=Drawing quality, E=Deep drawing quality

Base metal used: C=Cold rolled steel sheets, H=Hot rolled steel sheets

Standards: SG=JIS hot dip zinc-coated steel sheets standard, JFE=JFE Standard

Remarks on product use

Coated layer might be removed or discolored during degreasing or cleaning in some case.
Please confirm it before use.
In case of severe bending, deep drawing or use of adhesive tape, there is possibility of whitening or peeling of coated layer. Please confirm it before use.

Contact

JFE Steel Corporation

TOKYO HEAD OFFICE: Hibiya Kokusai Building, 2-3 Uchisaiwaicho 2-chome, Chiyodaku, Tokyo 100-0011, Japan; Phone : (81) 3- 3597-3711 Fax : (81) 3-3597-3767

While every effort has been made to ensure the accuracy of the information contained within this publication, the use of the information is at the reader’s risk and no warranty is implied or expressed by JFE Steel Corporation with respect to the use of information contained here.
The information in this publication is subject to change or modification without notice. Please contact the JFE Steel office for the latest information.