Steel DX54D +ZA
Finish state
EN DX54D · JIS SGCD
+ZA = zn-5 % Al (Galfan) coating, ZA095–ZA255
Use when very severe forming plus better corrosion life than +Z is required — the Zn-5Al coating is ductile and resists powdering.
Values for the +ZA condition
Other DX54D tempers and conditions
DX54D is listed in 5 conditions; see the grade overview at DX54D.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ZDefault Hot-dip zinc coated (Z100–Z275), skin-passed | Standard stocked condition: pure-zinc hot-dip coating for painted or unpainted deep-drawn parts in mild corrosive service. | 170 | 300 | 40 | 90 HB | 11 % IACS |
Galvannealed zinc-iron alloy coating | Pick for best paint adhesion and resistance-spot-weldability (automotive body parts); coating is harder and more powdering-prone in severe draws. | 170 | 300 | 38 | 93 HB | 11 % IACS |
Zinc-magnesium-aluminium coating | Choose when equal corrosion life is needed at 2–3× lower coating weight, or for good cut-edge protection in outdoor/agricultural parts. | 170 | 300 | 40 | 90 HB | 11 % IACS |
55 % Al-Zn (aluzinc/galvalume) coating, AZ150/AZ185 | Pick for the longest atmospheric life and heat resistance up to ~300 °C (building panels, appliance backs); cut edges are less well protected than +Z. | 170 | 300 | 38 | 91 HB | 11 % IACS |
+ZAThis page Zn-5 % Al (Galfan) coating, ZA095–ZA255 | Use when very severe forming plus better corrosion life than +Z is required — the Zn-5Al coating is ductile and resists powdering. | 170 | 300 | 40 | 90 HB | 11 % IACS |
What is DX54D +ZA?
DX54D +ZA is DX54D supplied in the +ZA condition — use when very severe forming plus better corrosion life than +Z is required — the Zn-5Al coating is ductile and resists powdering. DX54D +ZA has a yield strength of 170 MPa (24.7 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 99% of steel grades. Elongation at break is 40% and the elastic modulus is 210 GPa (30.5 Msi). DX54D +ZA has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F). +Z is the default condition FabDigit quotes; +ZA is available on request or by drawing note.
Advantages
- Forms and bends easily — 96/100, better than 100% of steel grades
- Ductile — tolerates forming and impact — 40%, better than 99% of steel grades
- Conducts heat well — 58 W/m·K (33.5 BTU/hr·ft·°F), better than 99% of steel grades
- High electrical conductivity — 11 % IACS, better than 98% of steel grades
- Good corrosion resistance — 48/100, better than 98% of steel grades
Limitations
- Hard to polish — 30/100, worse than 100% of steel grades
- Low strength — 170 MPa (24.7 ksi), worse than 99% of steel grades
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- High embodied carbon — 2.5 kg CO₂/kg, worse than 82% of steel grades
DX54D +ZA properties
Typical room-temperature values for DX54D +ZA; 20 are specific to this condition. Other listed values are DX54D reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
DX54D +ZA has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F).
Mechanical14
DX54D +ZA has a yield strength of 170 MPa (24.7 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 99% of steel grades. Elongation at break is 40% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
DX54D +ZA is rated for continuous service to 200°C (392 °F). It conducts heat at 58 W/m·K (33.5 BTU/hr·ft·°F), better than 99% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
DX54D +ZA conducts electricity at 11 % IACS, better than 98% of steel grades.
Chemical & Environmental3
Corrosion resistance is fair (48/100), better than 98% of steel grades.
Sustainability4
Producing a kilogram of DX54D +ZA takes about 30 MJ of energy and emits 2.5 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 25%.
Manufacturability7
DX54D +ZA's machinability is fair (50/100, worse than 53% of steel grades); weldability very good (80/100); formability excellent (96/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with DX54D +ZA
Is DX54D easy to machine?
Rarely machined; punching/blanking with sharp, well-clearanced tools is preferred since the soft, gummy sheet burrs and galls in drilling.
Can DX54D be welded?
Excellent for resistance spot, MAG (with zinc-tolerant transfer modes) and laser brazing; use higher current/electrode force than bare steel and extract zinc fume.
Can DX54D be formed, bent or molded?
Designed for severe deep drawing (r90 ≥ 1.6, n90 ≥ 0.18); use pre-oiled or chemically passivated + oiled coil, polished dies and avoid ageing-related stretcher strain (non-ageing guaranteed 6 months).
What surface finishes work on DX54D?
Phosphate + e-coat, powder coat or coil-coat directly on the zinc layer; +ZF gives the best paint keying, anodizing is not applicable.
DX54D chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| CULC/IF base commonly ≤0.01 % in practice | ≤ 0.08 | 0.03 |
| Mn | ≤ 0.4 | 0.2 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Tistabilising element for IF base metal (Nb may substitute by agreement) | ≤ 0.3 | 0.05 |
| Febalance; coating layer (Zn / Zn-Fe / Zn-Al-Mg / Al-Zn / Al-Si) is additional to the base analysis | balance | — |
DX54D +ZA — frequently asked
What is DX54D +ZA used for?
DX54D +ZA is typically used for automotive panels, appliance housings and galvanized stampings. In short: deep-drawing galvanized sheet; non-ageing for 6 months; multiple coating options.
What is the yield strength of DX54D +ZA?
DX54D +ZA has a typical yield strength of 170 MPa (24.7 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 99% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is DX54D +ZA easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). Rarely machined; punching/blanking with sharp, well-clearanced tools is preferred since the soft, gummy sheet burrs and galls in drilling.
Can DX54D +ZA be welded?
Yes — weldability is rated very good (80/100). Excellent for resistance spot, MAG (with zinc-tolerant transfer modes) and laser brazing; use higher current/electrode force than bare steel and extract zinc fume.
What surface finishes work on DX54D +ZA?
Phosphate + e-coat, powder coat or coil-coat directly on the zinc layer; +ZF gives the best paint keying, anodizing is not applicable.
Can DX54D +ZA be formed, bent or molded?
Designed for severe deep drawing (r90 ≥ 1.6, n90 ≥ 0.18); use pre-oiled or chemically passivated + oiled coil, polished dies and avoid ageing-related stretcher strain (non-ageing guaranteed 6 months).
What is the maximum service temperature of DX54D +ZA?
DX54D +ZA is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10346 — Continuously hot-dip coated steel flat products for cold forming — CEN (2015)
- JIS G 3302 — Hot-dip zinc-coated steel sheets and coils (SGCD) — JSA (2019)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Hot-dip galvanized steel DX51D–DX57D product data — ArcelorMittal / thyssenkrupp / voestalpine (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.