Galvanized DC56D+Z Coil
Galvanized coil DC56D+Z is a common galvanized steel sheet (coil) designation, primarily used in the stamping, home appliance, and construction industries. Below is a detailed explanation of this designation:
1. Designation Explanation
DC56D+Z is a galvanized steel sheet designation that complies with Chinese or international standards. The meanings of each component are as follows:
DC: Generally stands for "Cold Rolled" or "Drawing Quality Cold Rolled."
56: Represents the material grade or strength level (e.g., DC56 is typically a medium-strength grade suitable for stamping).
D: May indicate "Deep Drawing Grade" or "Special Application (e.g., high ductility)."
+Z: Indicates "pure zinc coating," as distinguished from zinc-iron alloys (e.g., +ZF) or other coatings.
2. Material Characteristics
Substrate Type: Cold-rolled steel sheet (SPCC, DC01, and similar materials).
Coating Type: Pure zinc coating (Z).
Coating Weight: Typically expressed in "g/m²" (e.g., 60/60, meaning 60 grams per square meter of coating on both sides).
Surface Treatment: May include chromate passivation (chrome-free/chrome-coated) and oiling to improve corrosion resistance.
Mechanical Properties:
Tensile Strength: Approximately 270-350 MPa (depending on the standard).
Elongation: ≥30% (suitable for deep drawing).
3. Related Standards
DC56D+Z may comply with one of the following standards:
Chinese Standard (GB):
GB/T 2518-2019 "Continuously Hot-Dip Galvanized and Zinc Alloy-Coated Steel Sheet and Strip."
Similar Grade: DC51D+Z (corresponding grade in European Standard EN 10346).
International Standards:
EN 10346 (European standard, corresponding to DX56D+Z).
JIS G 3302 (Japanese standard, corresponding to SGCC).
4. Typical Applications
Home Appliance Industry: Refrigerator panels, washing machine housings, etc.
Automotive Parts: Inner panels, covers, etc. (Specific coating and performance requirements apply).
Construction Industry: Lightweight steel keels, roof panels, etc. (Corrosion resistance rating must be confirmed).
5. Key Parameter Confirmation
If further material performance verification is required, it is recommended to clarify the following information:
Coating weight (e.g., Z60, Z80, etc.).
Surface structure (glossy, spangle-free, spangle-free, etc.).
Applicable Standards (GB/T 2518, EN 10346, etc.).
6. Frequently Asked Questions
Differences from DC51D+Z:
DC56D+Z generally has higher ductility than DC51D+Z, making it suitable for more complex stamping and forming.
Corrosion Resistance:
Pure zinc coating (Z) has better corrosion resistance than zinc-iron alloy (ZF), but its specific lifespan requires evaluation based on coating thickness and environmental conditions.
DC56D+Z(St07Z) hot dip galvanized automotive steel surface treatment:
| 1 Chromate treatment (L) |
Chromate treatment is a treatment with an aim to prevent white rusts formed on product surfaces during transportation and storage. |
|
2 Oiling (Y) |
Oiling is to prevent white rusts formed on product surfaces during transportation and storage. |
|
3 Chromate treatment + oiling (LY) |
This treatment with oiling after surface chromate treatment is to further avoid the forming of white rusts. |
Other relative galvanized steel grades in this standard are DC51D,DC51D+Z,DC51D+ZF,DC52D,DC52D+Z,DC52D+ZF,DC53D,DC53D+Z,
DC53D+ZF,DC54D,DC54D+Z,DC54D+ZF,DC56D,DC56D+Z,DC56D+ZF,St01Z,
St02Z,St03Z,St01ZR,St02ZR,St04Z,St05Z,St06Z,St06ZR,St07Z,StE280-2Z,
StE345-2Z,HSA340Z,HSA410Z,HSA340ZR,HSA410ZR.GNEE STEEL owned ten thousands tons stock with different thickness for galvanized steel plate DC56D+Z,DC56D+ZF,DC56D and galvanized steel coil DC56D+Z,DC56D+ZF,DC56D.
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