EN 10209 DC04EK/DC04ED/DC06ED (3.0 & 4.0 mm) Specification Sheet for Vitreous Enamelling - Knowledge

The durability of enamelled products-from domestic appliances to industrial chemical reactors-starts with the quality of the substrate. For engineers and procurement specialists, selecting EN 10209 DC04EK / DC04ED / DC06ED in heavy gauges like 3.0 mm and 4.0 mm is a strategic decision that impacts both the longevity of the final product and the efficiency of the manufacturing process. As a leading supplier, GNEE STEEL focuses on delivering steel that minimizes waste and maximizes enamel adhesion.

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Standard Reference: EN 10209 (Cold-reduced flat products of steel for vitreous enamelling) | Thickness: 3.0 mm, 4.0 mm | Delivery Condition: CR + Annealed + Skin-passed (CR+AN+SKP)

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1. Basic Grade & Material Information

Item	DC04EK	DC04ED	DC06ED	Description
Steel Number (W.Nr.)	1.0392	1.0393	1.0394	European standard material identification
Grade Type	Standard Enamelling Steel	Deep-Drawing Direct Enamelling Steel	Extra Deep-Drawing Direct Enamelling Steel	Ultra-low carbon ED grades for direct enamelling
Nominal Thickness	3.0 mm, 4.0 mm	3.0 mm, 4.0 mm	3.0 mm, 4.0 mm	Fixed thickness for heavy-duty enamelling parts
Application Scope	Conventional enamelling (1-2 layers)	Single-fire direct enamelling, deep-drawn parts	Complex extra deep-drawn components, high-end enamelling	Optimized for vitreous enamelling process compatibility

2. Chemical Composition (Mass Fraction, %)

Strictly controlled for anti-bubbling and enamelling adhesion performance

Element	DC04EK	DC04ED	DC06ED	Control Purpose
Carbon (C), max	≤ 0.080	≤ 0.004	≤ 0.003	Eliminate enamelling bubbles, prevent fish scaling
Manganese (Mn), max	≤ 0.40	≤ 0.30	≤ 0.25	Improve enamelling layer adhesion
Phosphorus (P), max	≤ 0.025	≤ 0.020	≤ 0.015	Avoid grain boundary embrittlement
Sulfur (S), max	≤ 0.020	≤ 0.015	≤ 0.010	Reduce enamelling surface defects
Soluble Aluminum (Al), min	≥ 0.020	≥ 0.025	≥ 0.030	Fix nitrogen, enhance deep drawability
Ti/Nb Microalloying	-	Trace	Trace	Refine grains, stabilize microstructure

3. Mechanical Properties (Transverse Direction, 3.0/4.0 mm)

Tested per EN 10209 standard; adjusted for thickness > 2.0 mm per specification

Property	DC04EK	DC04ED	DC06ED	Unit
Yield Strength (R)	140 – 220	130 – 200	120 – 180	MPa
Tensile Strength (R)	270 – 350	270 – 340	260 – 330	MPa
Elongation (A), min	≥ 36	≥ 38	≥ 40	%
Plastic Strain Ratio (r̅), min	≥ 1.2	≥ 1.4	≥ 1.6	-
Strain Hardening Exponent (n), min	≥ 0.18	≥ 0.20	≥ 0.22	-

4. Dimensional & Surface Tolerances

Item	Specification	Remarks
Thickness Tolerance	± 0.10 mm	Precision tolerance per EN 10209
Standard Width Range	900 – 1850 mm	Custom slitting available upon request
Surface Quality	FB / FC Grade	No scale, pits, scratches or defects
Surface Roughness (Ra)	0.6 – 1.9 μm	Optimized for enamelling adhesion
Flatness	High precision, stress-relieved	Stable forming and enamelling performance

5. Enamelling-Specific Performance

Performance Index	DC04EK	DC04ED	DC06ED
Enamel Adhesion	Good	Excellent	Outstanding
Anti-Bubbling Performance	Fair	High	Premium
Deep Drawability	Moderate	High	Extra High
Firing Stability	Stable	Very Stable	Extremely Stable
Suitability for Complex Parts	General	Suitable	Most Suitable

6. Typical Applications

DC04EK: Water heater liners, oven casings, daily-use enamel tableware, general enamel components
DC04ED: Deep-drawn enamel liners, household appliance shells, architectural enamel panels, single-fire enamelling parts
DC06ED: Extra deep-drawn irregular parts, high-end sanitary ware, precision enamel equipment, high-grade industrial enamelling products

Note: All parameters comply with EN 10209 standard; custom test reports and material certificates (Mill Test Certificate) are available for bulk orders.

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