What is DX51D?
DX51D is a grade of hot-dip galvanized low-carbon steel under EN 10346, which is primarily used for cold-forming applications. It offers excellent corrosion resistance and flexibility. It is usually used in construction, automotive manufacturing, and household appliances due to its versatility.
Breaking Down the DX51D Designation
"D" – Cold Forming Steel
"X" – Unspecified Rolling State. It can be either hot-rolled or cold-rolled.
"51" – Steel Grade Serial Number. The higher numbers (e.g., 52, 53, 54) indicate better formability.
"D" – Hot-Dip Galvanized Coating
"+Z, +ZF, etc." – Coating Types.
What Is the Difference Between DX51D and DX52D?
DX51D and DX52D are both hot-dip galvanized steels used for cold forming. DX52D has higher ductility and better elongation than DX51D. DX52D is more suitable for complex forming processes that require greater flexibility, while DX51D is used for standard forming applications.
DX51D Equivalent Steel Grade and Material Number
| Region | Standard | Equivalent Grade |
| Europe | EN 10346 | DX51D |
| United States | ASTM A653 | A653/A653M Class B |
| Japan | JIS G3302 | SGCC |
| China | GB/T 2518 | Q195/Q235 |
| India | IS 277 | IS 277 |
| German | DIN EN 10130, DIN 1623 | 1.0322, 1.0335, DC01, DC04, DD11, DD13, St12, St14, St22, StW24, USt3, USt4 |
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Material Number
1.0917: Material number based on the European material standard EN 10027-2.
1.0226: Confirmed as the most commonly used material number for DX51D under the EN 10346 standard
Why DX51D 1.0917 Is Ideal for Long-Term Projects
- Predictable corrosion resistance
- Stable coating behavior
- Uniform forming properties
- Low maintenance cost
Mechanical Properties of DX Grades (EN 10346)
| Grade | Coating | Standard | Yield strength Re (MPa) | Tensile strength Rm (MPa) | Elongation A80 (min %) | r90 (min) | n90 (min) |
|---|---|---|---|---|---|---|---|
| DX51D | Z, ZA, ZF | EN 10346 | - | 270 – 500 | 22 | - | - |
| DX52D | Z, ZA, ZF | EN 10346 | 140 – 300 ²) | 270 – 420 | 26 | - | - |
| DX53D | Z, ZA, ZF | EN 10346 | 140 – 260 | 270 – 380 | 30 | - | - |
| DX54D | Z, ZA, ZF | EN 10346 | 120 – 220 | 260 – 350 | 36 | 1.6 ⁴) | 0.18 |
| DX56D | Z, ZA, ZF | EN 10346 | 120 – 180 | 260 – 350 | 39 | 1.9 ⁵) | 0.21 ⁵) |
| DX57D | Z, ZA | EN 10346 | 120 – 170 | 260 – 350 | 41 | 2.1 ⁵) | 0.22 |
DX53D, DX54D, DX56D and DX57D are non-ageing steels, i.e. their properties will remain unaltered at least for six months
1) If no pronounced yield point is present, the 0.2 % yield point value Rp0,2 is used. If the product has a pronounced yield point, the values apply to the lower yield point ReL.
2) DX52D: this upper limit applies only to Surface quality B. For Surface quality A, the upper limit is 360 MPa.
3) Decreased minimum elongation A80 value for thickness 0.50mm < t ≤ 0.70mm (minus 2 units) and t ≤ 0.50mm (minus 4 units) apply. In addition, in case of ZF coating on DX54D or DX56D the minimum elongation A value is reduced (minus 2 units).
4) DX54D: decreased minimum r90-values for product thickness 1.5mm < t < 2 mm (minus 0.2 units) and t ≥ 2 mm (minus 0.4 units) apply. In addition, in case of ZF coating the minimum r90-value isreduced (minus 0.2 units).
5) DX56D and DX57D decreased minimum r90-values for product thickness 1.5mm < t < 2 mm (minus 0.2 units) and t ≥ 2 mm (minus 0.4 units) apply.
In addition, in case of ZF coating both minimum r90-value (minus 0.2 units) and minimum n90-value (minus 0.01 units) are lower and further the following reductions apply:
- decreased minimum r90-values for product thickness 0.50mm < t ≤ 0.70mm (minus 0.2 units) and t ≤ 0.50mm (minus 0.4 units).
- decreased minimum n90-values for product thickness 0.50mm < t ≤ 0.70mm (minus 0.01 units) and t ≤ 0.50mm (minus 0.03 units)
GNEE STEEL's advanced production control ensures each coil of DX51D 1.0917 galvanized steel delivers consistent coating thickness, surface uniformity, and mechanical performance - guaranteeing long-term project success.
