What is DC06ED Enameling Steel?
DC06ED is a premium cold rolled low carbon steel specifically optimized for direct-on (one-coat) enameling process with stamping level 06 (extra ultra deep drawing). With ultra-low carbon (≤0.008%), titanium stabilization (≤0.15%), and lowest manganese (≤0.35%), it enables excellent enamel adhesion directly to the steel surface without a ground coat while offering superior formability, aging resistance, and enhanced dent resistance.
No stretcher strain marks appear during use per GB/T 13790-2025 Table 7. Typical applications include direct-on enameled water heater tanks, complex sanitary ware, bathtubs, and extra ultra deep drawn anti-denting components.
DC06ED consists of four parts:
- D — Cold forming steel flat product
- C — Cold rolled condition
- 06 — Stamping level: Extra ultra deep drawing (Level 06)
- ED — Direct-on enameling process with anti-denting requirements; also suitable for traditional enameling
- Ultra-low carbon (≤0.008%) + Ti stabilization
- Direct-on one-coat enameling
- Enhanced dent resistance
- r90 ≥1.8, no stretcher strains during use
| Grade | C (%) | Mn (%) | P (%) | S (%) | Alsb (%) | Tic (%) |
|---|---|---|---|---|---|---|
| DC06ED | ≤0.008 | ≤0.35 | ≤0.020 | ≤0.050 | — | ≤0.15 |
• a Table 5 applies to ladle analysis values.
• b Als = Acid-soluble aluminum content.
• c Ti = Titanium content.
• d For DC01EK, DC03EK, DC04EK, the minimum Als content is 0.010%.
• e For DC03ED and DC04ED, the carbon content is the guaranteed value after decarburization annealing.
• Permissible deviations for product analysis shall comply with GB/T 222 (Clause 7.1.2).
⚠️ Aging effect: properties may change over time – early use recommended (7.2.2).
| Grade | ReLa (MPa) ≤0.50mm |
ReLa (MPa) >0.50~0.70 |
ReLa (MPa) >0.70mm |
Rm (MPa) | A80mmc (%) ≤0.50mm |
A80mmc (%) >0.50~0.70 |
A80mmc (%) >0.70mm |
r90e 0.50~2.00mm |
r90e >2.00mm |
|---|---|---|---|---|---|---|---|---|---|
| DC06ED | ≤230 | ≤210 | ≤190 | 270~350 | ≥34 | ≥36 | ≥38 | ≥1.8 | ≥1.6 |
• a When yield phenomenon is not obvious, the proof strength Rp0.2 shall be used.
• b Upon agreement, the lower yield strength limit may be specified: for DC06ED, 120 MPa.
• c Specimen is P6 from GB/T 228.1—2021, transverse direction.
• d For thickness not less than 1.5 mm, the upper limit of yield strength is 225 MPa.
• e The specified minimum r90 applies only to thickness ≥0.50 mm. r90 calculated at 15% plastic strain (Table 9).
| Grade | Requirement |
|---|---|
| DC01EK, DC03EK, DC04EK, DC05EK, DC03ED, DC04ED | For FC/FD surface, no stretcher strains within 6 months |
| DC06ED, DC06EK, DC07EK | ✔️ No stretcher strains shall appear during use under room temperature storage |
🔬 7.4.1 Anti-fishscale (Hydrogen permeation test)
Upon agreement, hydrogen permeation test (Annex B) may be carried out. TH = tb/d² ≥ 6.7 min/mm² (Electrolyte A).
Note: For Ti-stabilized steels, results need agreement per Annex B.7.2.
🧪 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
Recommended for first-time use or when enamel frit/process changes.
FB/FC/FD available. No cracks, blisters, folds.
Usually oiled, 6-month rust protection.
GB/T 13790—2025: DC06ED ≈ EN 10209:2023 DC06ED, ISO 5001:2012 VE05 Type 2.
- Ultra-low carbon (≤0.008%) + Titanium stabilization (≤0.15%)
- Lowest manganese (≤0.35%) for maximum formability
- Direct-on one-coat enameling – saves ground coat cost
- Enhanced dent resistance for anti-denting applications
- Extra ultra deep drawing: yield strength as low as 190 MPa, elongation up to 38%
- r90 ≥1.8, no stretcher strain marks during use
- 6-month mechanical property guarantee