What is DX53D galvanized steel?
DX53D is the third forming level in EN 10346: after DX51D (bending) and DX52D (drawing) comes deep drawing. The substrate is an aluminium-killed, extra-low-carbon cold-rolled steel whose grain and texture are controlled during annealing to give a high plastic strain ratio (r ≈ 1.5–1.8) and a low yield ratio — the steel thins uniformly instead of necking, so it can be drawn to a depth greater than its diameter. The standard guarantees yield 140–260 MPa, tensile 270–380 MPa and 30 % elongation (A80), and mills add a non-ageing guarantee so the sheet does not develop stretcher strains after months in stock. The zinc coating is the same Z100–Z275 family, usually ordered minimised-spangle with surface quality B; the coating itself must survive the draw, which is why coating class and lubricant are specified together with the grade. DX53D covers most deep-drawn galvanized parts; DX54D (r ≥ 1.6, 36 %) and DX56D/57D exist for the extreme automotive cases.
Chemical composition
| Element | C | Si | Mn | P | S | Ti |
|---|---|---|---|---|---|---|
| max. % (ladle) | 0.10 | 0.50 | 0.60 | 0.08 | 0.030 | 0.30 |
Typical heat: C 0.02–0.04, Mn 0.15–0.20, Al 0.03–0.06 (killed).
Mechanical properties and deep-drawing indices
| Property | Requirement | Typical value | Note |
|---|---|---|---|
| Yield strength Rp0.2 | 140–260 MPa | 160–210 MPa | |
| Tensile strength Rm | 270–380 MPa | 290–340 MPa | |
| Elongation A80 | ≥ 30 % | 34–42 % | |
| r90 (plastic strain ratio) | not specified | ≈ 1.6 | DX54D guarantees ≥ 1.6 |
| n90 (hardening exponent) | not specified | ≈ 0.20 | |
| Ageing | non-ageing on agreement | 6 months |
Equivalent grades
| System | Grade | Note |
|---|---|---|
| EN 10142 (old) | DX53D+Z (EN 10142) | withdrawn 2004 |
| DIN 17162 | St 05 Z+Z (EN 10142) | historic German |
| JIS G3302 | SGCD2 | |
| ASTM A653 | DDS Type A / Deep Drawing Steel | coating G90 ≈ Z275 |
| GB/T 2518 | DX53D+Z |
Zinc coating classes (Z100–Z600)
| Class | Zinc mass (g/m², both sides) | Thickness per side (µm) | Typical life C3 | Where used |
|---|---|---|---|---|
| Z100 | 100 | ≈ 7 | 4–6 years | indoor, painted parts, ducting |
| Z140 | 140 | ≈ 10 | 6–9 years | the Turkish stock standard |
| Z200 | 200 | ≈ 14 | 9–13 years | roofing, outdoor cladding |
| Z275 | 275 | ≈ 20 | 12–18 years | export standard, purlins, structural |
| Z350 | 350 | ≈ 25 | 15–22 years | agriculture, coastal |
| Z450 / Z600 | 450 / 600 | ≈ 32 / 42 | 20–35 years | highway, marine, ground contact |
Life = time to 5 % red rust per ISO 9223 C3 (0.7–2.1 µm zinc loss per year); halve it for C4 industrial-coastal, double it for C2 rural. Spangle: normal (N) or minimised (M); surface quality A (normal) or B (improved, for painting); surface treatment C (chemical passivation), O (oiled), CO (both).
Thickness range and stock sizes
| Thickness | Widths × lengths | Availability |
|---|---|---|
| 0.40–0.80 mm | coil 1 000 / 1 250 mm; blanks to size | to order 3–4 weeks |
| 1.0–2.0 mm | coil 1 000 / 1 250 / 1 500 mm | to order 3–4 weeks |
Weight per m² and per sheet
| Thickness | kg/m² | 1 000 × 2 000 (kg) | 1 250 × 2 500 (kg) | 1 500 × 3 000 (kg) |
|---|---|---|---|---|
| 0.4 mm | 3.28 | 6.6 | 10.3 | 14.8 |
| 0.5 mm | 4.07 | 8.1 | 12.7 | 18.3 |
| 0.6 mm | 4.85 | 9.7 | 15.2 | 21.8 |
| 0.7 mm | 5.64 | 11.3 | 17.6 | 25.4 |
| 0.8 mm | 6.42 | 12.8 | 20.1 | 28.9 |
| 1 mm | 7.99 | 16.0 | 25.0 | 36.0 |
| 1.2 mm | 9.56 | 19.1 | 29.9 | 43.0 |
| 1.5 mm | 11.92 | 23.8 | 37.2 | 53.6 |
| 2 mm | 15.84 | 31.7 | 49.5 | 71.3 |
Includes Z140 coating; add 0.135 kg/m² for Z275.
Forming, welding and painting
Draw ratios to about 2.0 in one stage; use drawing oil compatible with zinc, polished or coated tools and adequate blank-holder force to avoid wrinkling — the low yield makes the sheet prone to it. The coating stays intact through the draw when Z140–Z200 and minimised spangle are chosen; heavy Z275 on deep parts may flake at sharp radii. Spot welding with pulsed current; MAG with fume extraction. Paint after degreasing; passivation C or a thin organic coating (TOC) on request.
Where it is used
- Deep-drawn housings, cups and cylinders
- Extractor hoods, lamp and luminaire bodies
- Water-heater inner cups and appliance drums
- Automotive and trailer brackets and reinforcements
- Fuel-tank and reservoir shells (non-pressure)
- Complex HVAC and ventilation pressings
DX53D vs DX54D
DX54D tightens the yield window to 120–220 MPa, raises elongation to 36 % and guarantees r90 ≥ 1.6 and n90 ≥ 0.18 — the automotive deep-drawing level for body panels and the deepest cups. DX53D covers everything short of that at a lower price and shorter lead time. If the part has drawn successfully in DX53D-class material before, stay with it; move to DX54D only when a draw ratio above 2 or an r-value requirement is written into the specification. For shallower parts, DX52D is enough.
Price
DX53D is priced about 40 USD/t over DX51D; the band below is indicative FOB Istanbul for mill-order coil in the usual 0.40–2.0 mm range.
Bands from our weekly export list (September 2026), FOB Istanbul, full-container quantities, excluding freight and certificates. Firm price per project on RFQ within one working day.
Export and packing
Packing of DX53D galvanized steel: coils on cradles (eye-to-sky, VCI wrap, four straps, 5–25 t) or sheet packs on skids up to 3 t with interleaving paper and corner protectors; 20' ≈ one coil (≤ 20 t), 40' HC ≈ two coils or 24 t of sheet. Tariff 7210 / 7209 / 7208.
| Term | Detail |
|---|---|
| MOQ | One coil (10–20 t) |
| Incoterms | FOB Istanbul · CIF / CFR Gulf, Africa · DAP EU, Balkans, Iraq, Caucasus · DAP Aktau |
| Lead time | To order 3–4 weeks |
| Packing | Coil eye-to-sky on cradle, VCI wrap, paper interleaved sheet on skids |
| Container / truck | 20' one coil ≤ 20 t; 40' HC two coils |
| Documents | Invoice, packing list, EN 10204 3.1 (3.2 on request), certificate of origin; SASO / SONCAP / PVoC on request |
| Payment | 30% advance, balance against B/L copy; L/C at sight for orders above 100 t |
Certificates and testing
Every lot of DX53D galvanized steel carries an EN 10204 3.1 inspection certificate listing heat, chemistry, mechanical and impact results. On request we add 3.2 witnessing by a classification society or inspector, EN 10160 ultrasonic testing and supplementary impact tests at the customer's design temperature.
How to order
Specify thickness × width, coating class and spangle, surface B, treatment (O for pressing), non-ageing requirement, the part drawing if available, and tonnage; mill slot within one working day.
Standards
- EN 10346:2015 — DX53D+Z, 1.0355
- EN 10143 — tolerances
- EN 10204 3.1
- Former EN 10142 / DIN 17162 St 05 Z
Grades
Grade data sheets (chemistry, mechanicals, equivalents) are on our reference site: DX53D · DX52D · DX54D
Frequently asked questions
What is DX53D steel?
The deep-drawing hot-dip galvanized steel of EN 10346 (1.0355): Al-killed extra-low-carbon substrate, yield 140–260 MPa, elongation ≥ 30 %, r-value about 1.6, coating Z100–Z275.
What is the ASTM equivalent of DX53D?
ASTM A653 DDS Type A (Deep Drawing Steel); JIS G3302 SGCD2.
What is the difference between DX53D and DX54D?
DX54D has a narrower yield window (120–220 MPa), 36 % elongation and guaranteed r90 ≥ 1.6 / n90 ≥ 0.18 for automotive-class deep drawing; DX53D is the general deep-drawing grade.
Which zinc coating for deep drawing?
Z140–Z200 with minimised spangle keeps the coating intact in deep draws; Z275 may flake at sharp radii on deep parts.