What's JAC270E steel ?
JAC270E is a steel grade in Japanese standard JFS A 3011 , it is hot-dip galvannealed steel sheet or strip for automobile use. JAC270E is a deep drawing quality steel material.The coating of JAC270E is Zinc and Iron alloy. The base material product is cold rolled steel sheet. The "C" in "JAC270E" means cold rolled, the "E" in "JAC270E" means deep drawing.
JAC270E cold rolled hot dip galvanized steel is a deep-drawing grade designed for automotive and high-precision manufacturing. Its grade designation follows JFS standards, with clear parameter definitions:
- JAC: Abbreviation for Japanese Automotive Cold-rolled steel, indicating its specialization for automotive applications.
- 270: Minimum tensile strength of 270 MPa, the core performance benchmark for the grade.
- E: Deep-drawing quality grade, signifying higher formability than JAC270C/D and lower than JAC270F.
Processing: Cold rolled (CR) base material + hot dip galvanized (HDG) Zn-Fe alloy coating, combining the advantages of cold-rolled precision and galvanized corrosion protection.
Coating of JAC270E steel
| Coating material | Zn-Fe(ZF) |
| Coating type | Zn-Fe(ZF) double-sided coating 60 ~ 440G / m2, single-sided coating 30 ~ 220g / m2 |
Key Applications in Automobile
Because JAC270E is exceptionally "stretchy" (high ductility) and corrosion-resistant, it is typically used for complex, deep parts of a car's body:
Body Panels: It is used for internal and external panels that have complex curves, such as fenders, door inner panels, and floor pans.
Structural Components: Parts of the Body in White (BiW) that require precise forming but don't necessarily need the ultra-high strength of a bumper beam (e.g., spare tire wells or dash panels).
Deep-Drawn Parts: Any component where the steel must be pressed deeply into a mold without tearing or thinning excessively.
GNEE STEEL have more than 2000 tons JAC270E steel stock source each month. We can meet our customer's most of quantity and technical request. Based on these stock source, our advantage industry spread into steel process like : cutting(on width and length), drawing, repacking, and so on.
Other steel grades of Hot dip Zinc-Iron (ZF) alloy coating steel for automobile manufacturing:
JAC270C Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC270D Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC270F Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC270G Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC270H Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC340W Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC340H Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC390W Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC440W Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC440R Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC590R Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC340P Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC390P Hot dip Zinc-Iron (ZF) alloy coating steel,
JAC440P Hot dip Zinc-Iron (ZF) alloy coating steel
FAQ
1.Is JAC270E compatible with welding processes?
Yes. JAC270E's low carbon content (≤0.08%) and optimized composition ensure excellent weldability, compatible with resistance spot welding (common in automotive production), MIG, TIG, and laser welding. Proper welding parameters maintain material ductility and coating integrity.
2. What are the dimensional tolerances for JAC270E?
JAC270E has strict dimensional tolerances: thickness tolerance ±0.02mm, width tolerance ±1.0mm, and length tolerance ±2.0mm (for cut sheets). The cold rolled base ensures high flatness, suitable for automated stamping lines.
3. Does JAC270E meet automotive industry standards?
Yes. JAC270E fully complies with JFS A2001 (cold-rolled automotive steel) and JFS A3011 (galvannealed automotive steel) standards, making it compatible with global automotive supply chains (e.g., Toyota, Honda, Nissan).
4. How does JAC270E compare to DC04 steel?
JAC270E and DC04 (EN 10130 standard) are both deep-drawing grades, but JAC270E offers higher elongation (42–55% vs. DC04's 38–48%) and better galvanized coating adhesion, making it more suitable for automotive components requiring both deep drawability and corrosion resistance.
