SECD electro‑galvanized steel sheets
SECD electro‑galvanized steel sheets (JIS G3313, Drawing grade) are cold‑rolled low‑carbon steel substrates electrolytically coated with a uniform zinc layer, engineered for exceptional deep drawability, high surface quality, and reliable corrosion resistance. As a specialized grade above commercial‑grade SECC, SECD is the preferred material for complex stamped components in automotive, appliance, and electronics industries, delivering consistent performance in high‑volume production.
1. SECD chromate-free Anti-fingerprinting electrogalvanized steel sheet mechanical properties specified value:
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Mechanical properties specified value |
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Symbol |
Aging characteristics( stretcher strain) |
Yield strength MPa |
Tensile strength MPa |
(L0=50mm, b=25mm)% 不小于 |
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Mm/nominal thickness |
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0.4~<0.6 |
0.6~1.0 |
1.0~<1.6 |
≧1.6 |
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SECD |
Products shall be free from stretcher strains marks within 3 months form manufactured date. |
240 |
270 |
36 |
38 |
39 |
40 |
Note 1: If the yield strength is not pronounced, the yield strength values apply to the 0.2%-proof strength(Rp0.2)
Note 2: When 0.4mm
If any special requirement on thickness tolerance, flatness and mechanical properties, etc, please mention it at the time of ordering.
2. SECD chromate-free Anti-fingerprinting electrogalvanized steel sheet thickness tolerance-specified value:
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Thickness tolerance-specified value |
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Nominal thickness |
Thickness tolerance |
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Normal(PT.A) |
Restricted(PT.B) |
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mm/nominal width |
mm/nominal width |
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≦1200 |
>1200~1500 |
>1500 |
≦1200 |
>1200~1400 |
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|
<0.40 |
±0.03 |
±0.04 |
±0.05 |
±0.020 |
±0.025 |
|
>0.40~0.60 |
±0.03 |
±0.04 |
±0.05 |
±0.025 |
±0.030 |
|
>0.60~0.80 |
±0.04 |
±0.05 |
±0.025 |
±0.030 |
±0.035 |
|
>0.80~1.00 |
±0.05 |
±0.06 |
±0.07 |
±0.035 |
±0.040 |
|
>1.00~1.20 |
±0.06 |
±0.07 |
±0.08 |
±0.040 |
±0.050 |
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>1.20~1.60 |
±0.08 |
±0.09 |
±0.10 |
±0.050 |
±0.060 |
|
>1.60~2.00 |
±0.10 |
±0.11 |
±0.12 |
±0.060 |
±0.070 |
3. SECD chromate-free Anti-fingerprinting electrogalvanized steel sheet flatness-specified value:
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Nominal width |
Flatness not greater than |
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Normal(PT.A) |
Restricted(PT.B) |
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mm/nominal width |
mm/nominal width |
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<0.70 |
0.70~<1.20 |
≥1.20 |
<0.70 |
0.70~<1.20 |
≥1.20 |
|
|
≦1200 |
10 |
8 |
7 |
5 |
4 |
3 |
|
>1200~1400 |
12 |
10 |
8 |
6 |
5 |
4 |
When ordering is resticted flatness, it is necessary, but only in case of dispute, to verify the wave height:
If the length of an edge wave is not less than 200mm, its maximum height does not exceed 1% of its length.
If the length of an edge wave is less than 200mm, its maximum height does not exceed 2mm.
4. SECD chromate-free Anti-fingerprinting electrogalvanized steel sheet specified value for coating mass:
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Specified value for coating mass |
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Coating mass as recommended |
Min. Value at one point (per side) |
Min. Value at three points(per side) |
|
10/10 |
8.5 |
10 |
|
20/20 |
17 |
20 |
|
30/30 |
25.5 |
30 |
|
40/40 |
34 |
40 |
SECD electro‑galvanized steel sheets are the ideal choice for manufacturers requiring high‑precision deep drawing, superior surface quality, and long‑term corrosion resistance.
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FAQ
1. Does SECD electro-galvanized steel resist corrosion well?
With standard passivation, it offers reliable anti-corrosion performance for indoor and general service environments.
2. What size ranges do you supply for SECD sheets?
Available in thickness 0.4–3.0 mm and width 914–1524 mm, custom sizes are acceptable.
3. Is SECD suitable for painting and coating?
Yes. It has great paint adhesion and works well with liquid paint, powder coating and screen printing.
4. Will SECD produce stretcher strain marks easily?
No. It features good anti-aging property and avoids strain marks within 3 months.
5. Can I get free samples of your SECD steel sheets?
Certainly. We provide free samples for quality testing, you only need to cover the freight cost.