What is DC06ED Enameling Steel?
If you need extra ultra deep drawing capability combined with direct-on (one-coat) enameling, titanium stabilization, and enhanced dent resistance, DC06ED is the premium specialized grade you should consider.
DC06ED is a cold-rolled low carbon steel specifically optimized for direct-on enameling process (ED suffix) with stamping level 06 (extra ultra deep drawing). With ultra-low carbon (≤0.008%), titanium stabilization (≤0.15%), and the lowest manganese content (≤0.35%) among ED grades, it enables excellent enamel adhesion directly to the steel surface without a ground coat while offering superior formability, aging resistance, and enhanced dent resistance.
When you use DC06ED, you benefit from the cost savings of one-coat enameling, exceptional formability for the most complex parts, consistent surface quality after firing, and minimal rejects due to fish scaling or poor adhesion. No stretcher strain marks appear during use as per GB/T 13790-2025 Table 7.
Typical applications include direct-on enameled water heater tanks, complex sanitary ware, bathtubs, household enamelware, industrial components, and extra ultra deep drawn anti-denting applications.
According to GB/T 13790—2025 Cold rolled low carbon steel sheet and strip for vitreous enamelling Supersedes GB/T 13790—2008 / GB/T 29515—2013
Technical Data Sheet — Grade DC06ED (Direct-On Enameling Process / Extra Ultra Deep Drawing Quality / Ti-Stabilized)
📌 Designation System Clause 4.2
DC06ED consists of four parts:
- D — Steel flat product for cold forming
- C — Cold rolled condition
- 06 — Stamping level: Extra ultra deep drawing (Level 06)
- ED — Enamelling type: Suitable for direct-on (one-coat) enameling process and anti-denting requirements; also suitable for traditional enameling
📖 Note: "ED" suffix indicates direct-on enameling process with enhanced dent resistance. DC06ED is titanium-stabilized with ultra-low carbon (≤0.008%) for excellent enamel adhesion without a ground coat, with extra ultra deep drawing capability and r90 ≥1.8.
📊 DC06ED vs Other Enameling Grades – Why Choose DC06ED?
1️⃣ vs DC06EK
DC06EK: Traditional enameling (C ≤0.008%, Ti)
DC06ED: Direct-on enameling + Anti-denting
Enhanced dent resistance for anti-denting applications
Suitable for one-coat enameling process
Both offer Ti stabilization and r90 ≥1.8
2️⃣ vs DC04ED
DC04ED: Extra deep drawing (C ≤0.004%, no Ti)
DC06ED: Extra ultra deep drawing + Ti stabilization
Higher elongation (≥38% vs ≥38% similar, but better drawability)
Superior aging resistance due to Ti addition
No stretcher strain marks during use (stricter requirement)
3️⃣ vs DC03ED
DC03ED: Deep drawing (ReL ≤280/260/240 MPa)
DC06ED: Extra ultra deep drawing (ReL ≤230/210/190 MPa)
Lower yield strength, higher elongation
Titanium stabilized for aging resistance
4️⃣ Key Advantages
- Ultra-low carbon (≤0.008%) + Titanium stabilization (≤0.15%)
- Lowest manganese (≤0.35%) for maximum formability
- Direct-on (one-coat) enameling capability
- Enhanced dent resistance for anti-denting applications
- Extra ultra deep drawability (stamping level 06)
- High plastic strain ratio r90 ≥1.8 (0.50-2.00mm)
- No stretcher strain marks during use (Table 7)
- Hydrogen permeation validated (TH ≥6.7)
💡 Key takeaway: DC06ED is the premium titanium-stabilized direct-on enameling steel, offering the highest formability among ED grades with extra ultra deep drawing capability (stamping level 06), enhanced dent resistance, and no stretcher strain marks during use. Its ultra-low carbon (≤0.008%) and titanium stabilization provide superior aging resistance and excellent enamel adhesion without a ground coat.
🏺 Enameling Performance
🎯 Designed for
- Direct-on (one-coat) enameling
- Anti-denting applications
- Traditional two-coat enameling (also suitable)
- Extra ultra deep drawn complex components
✨ Key Characteristics
- Excellent enamel adhesion (ultra-low carbon)
- Proven fish-scale resistance (TH ≥6.7)
- Enhanced dent resistance
- Titanium stabilized for aging resistance
- Extra ultra deep drawing capability
- No stretcher strain marks during use
⚙️ What makes DC06ED the premium titanium-stabilized direct-on enameling steel? Its ultra-low carbon (≤0.008%) and titanium stabilization (≤0.15%) enable excellent enamel adhesion directly to the steel surface without a ground coat while providing superior aging resistance. The hydrogen permeation test validates fish scale resistance (TH ≥6.7 min/mm²), while enhanced dent resistance makes it suitable for anti-denting applications. With extra ultra deep drawing capability (stamping level 06), highest elongation (up to 38%), and r90 ≥1.8, it handles the most complex part shapes without cracking. Per Table 7, no stretcher strain marks appear during use.
⚙️ Chemical Composition Clause 7.1 – Table 5 (Ladle analysis)
| Grade | C (%) | Mn (%) | P (%) | S (%) | Als (%) | Ti (%) |
|---|---|---|---|---|---|---|
| DC06ED | ≤0.008 | ≤0.35 | ≤0.020 | ≤0.050 | — | ≤0.15 |
🔬 Permissible deviations for product analysis according to GB/T 222 (Clause 7.1.2). Ultra-low carbon (≤0.008%), titanium stabilization (≤0.15%), and lowest manganese (≤0.35%) provide maximum formability, superior aging resistance, and excellent enamel adhesion for direct-on enameling.
📊 Mechanical Properties Clause 7.2 – Table 6
✅ Guarantee period: 6 months from manufacture date (7.2.1).
⚠️ Aging effect: yield & tensile strength may increase over time, elongation decreases – recommend early use (7.2.2). Titanium stabilization provides superior aging resistance.
⚠️ Aging effect: yield & tensile strength may increase over time, elongation decreases – recommend early use (7.2.2). Titanium stabilization provides superior aging resistance.
| Grade | ReL (MPa) ≤0.50mm |
ReL (MPa) >0.50~0.70 |
ReL (MPa) >0.70mm |
Rm (MPa) | A80mm (%) ≤0.50mm |
A80mm (%) >0.50~0.70 |
A80mm (%) >0.70mm |
r90 0.50~2.00mm |
r90 >2.00mm |
|---|---|---|---|---|---|---|---|---|---|
| DC06ED | ≤230 | ≤210 | ≤190 | 270~350 | ≥34 | ≥36 | ≥38 | ≥1.8 | ≥1.6 |
📐 When yield phenomenon not obvious, use Rp0.2. 🔧 Lower yield strength limit of 120 MPa negotiable. 🧪 P6 transverse specimen. Plastic strain ratio r90 measured at 15% plastic strain (Table 9 note). For thickness ≥1.5mm, yield strength upper limit is 225 MPa. Enhanced dent resistance for anti-denting applications.
📏 Stretcher Strain Clause 7.3 – Table 7
| Grade | Stretcher strain requirements |
|---|---|
| DC01EK, DC03EK, DC04EK, DC05EK, DC03ED, DC04ED | For surface quality levels FC and FD, no stretcher strains within 6 months from manufacture date. |
| DC06ED, DC06EK, DC07EK | ✔️ No stretcher strains shall appear under room temperature storage during use. (Strictest requirement) |
📌 Per Table 7, DC06ED has the strictest stretcher strain requirement: no stretcher strains shall appear during use (not just within 6 months), thanks to titanium stabilization.
📋 Enamelability Requirements Clauses 7.1.2 – 7.4.3
- 7.1.2 – Permissible deviations for product chemical analysis shall comply with GB/T 222.
- 7.2.1 – Mechanical properties guaranteed for 6 months from manufacture date as per Table 6.
- 7.2.2 – Due to aging effects, properties may change over time; early use is recommended. Titanium stabilization provides superior aging resistance.
- 7.3.1 – Skin-passing is applied, but stretcher strain tendency may reappear; titanium-stabilized grades have better resistance.
- 7.3.2 / Table 7 – For DC06ED: no stretcher strains shall appear under room temperature storage during use.
- 7.4.1 – Hydrogen permeation test may be carried out upon agreement to evaluate fish-scale resistance.
- 7.4.2 – Adhesion test may be performed upon agreement; pretreatment and enameling conditions shall be stated in contract.
- 7.4.3 – Enamelability evaluation tests are recommended for first-time use or when enamel frit/process changes.
🔬 7.4.1 Anti-fishscale (Hydrogen permeation test)
Upon agreement, hydrogen permeation test (Annex B) may be carried out. Acceptance criteria by agreement.
📍 TH = tb/d² ; Electrolyte A: TH ≥ 6.7 min/mm². Electrolyte B: TH ≥ 6.7 min/mm² (negotiable for B/Ti steels). Note: For Ti-stabilized steels like DC06ED, results and treatment need agreement between supplier and buyer per Annex B.7.2 note.
🧪 7.4.2 Enamel adhesion test
Upon agreement, adhesion test may be performed. Pretreatment and enameling conditions shall be stated in contract.
🔄 7.4.3 Enamelability evaluation test
When using material first time or enamel frit/process changes, evaluation tests are recommended.
📋 Additional Technical Requirements
Surface quality (Table 8)
FB/FC/FD available. For DC06ED: no stretcher strains during use. No cracks, blisters, folds.
FB/FC/FD available. For DC06ED: no stretcher strains during use. No cracks, blisters, folds.
Oiling & rust (7.7)
Usually oiled, 6-month rust protection. Non-oiled: supplier not liable for rust/scratches.
Usually oiled, 6-month rust protection. Non-oiled: supplier not liable for rust/scratches.
📌 Surface texture: Dull Ra 0.6–1.9μm; Rough Ra >1.6μm (7.6). Dimensions per GB/T 708 (7.8). Plastic strain ratio r90 ≥1.8 for thickness 0.50-2.00mm, ≥1.6 for thickness >2.00mm (Table 6). Enhanced dent resistance for anti-denting applications.
🏭 Manufacturing & Inspection
6.2 Annealed + skin-passed | 9.2 Batch ≤30t | 8.2 Tensile 1/batch | 10 Inspection doc type 3.1
📖 International grade comparison (Annex A)
GB/T 13790—2025: DC06ED ≈ EN 10209:2023 DC06ED, ISO 5001:2012 VE05 Type 2.
GB/T 13790—2025: DC06ED ≈ EN 10209:2023 DC06ED, ISO 5001:2012 VE05 Type 2.
🧪 Hydrogen Permeation Test Annex B
Thickness 0.50–3.00mm. TH = tb/d² ≥ 6.7 min/mm² (Electrolyte A). Note for Ti-stabilized steels: Due to lack of evidence directly relating anti-fishscale performance to hydrogen permeation time for Ti-added enameling steels, test results and treatment need agreement between supplier and buyer (Annex B.7.2 note).
✅ Why specifiers choose DC06ED enameling steel
- Ultra-low carbon (≤0.008%) + Titanium stabilization (≤0.15%) – maximum formability, superior aging resistance
- Lowest manganese (≤0.35%) – exceptional formability among ED grades
- Direct-on (one-coat) enameling capability – saves production costs by eliminating ground coat
- Enhanced dent resistance – suitable for anti-denting applications
- Extra ultra deep drawing performance – yield strength as low as 190 MPa, elongation up to 38%
- High plastic strain ratio – r90 ≥1.8 (0.50-2.00mm) / ≥1.6 (>2.00mm)
- No stretcher strain marks during use – strictest requirement per Table 7
- Fish scale resistance – validated by hydrogen permeation test (TH ≥6.7 min/mm²)
- 6-month mechanical property guarantee from manufacture date
- Hydrogen permeation / adhesion tests available upon agreement
- Oiled option: 6-month rust protection
Based on GB/T 13790—2025. Actual delivery subject to contract. Data verified per standard Tables 5, 6, 7 and Annex B. r90 values per Table 6. For Ti-stabilized DC06ED, hydrogen permeation results negotiable per Annex B.7.2 note.