DX57D+Z
EN 10346 · 1.0324
DX57D+Z is a sheet-forming steel (Hot-Dip Coated IF family) to EN 10346 (1.0324). It has a specified 0.2 % proof stress of 120 MPa and a typical tensile strength of about 290 MPa, with a uniform elongation of 42 %. Nominal carbon content is around 0.02 %. For nonlinear FEA, a bilinear model uses E = 210 GPa up to yield and a tangent modulus of 407 MPa above it. It is a general-purpose wrought steel selected on strength, cost and availability.
Bilinear material model — nonlinear FEA
Uniform elongation εu = 42.0% · conservative analysis limit ½εu = 21.0%
Bilinear (BISO) approximation. Elastic modulus E up to the 0.2% proof stress R_p0.2, then a single tangent slope Eₜ to the ultimate tensile strength: Eₜ = (Rₘ − R_p0.2) / (εu − R_p0.2/E − 0.002), where εu is the uniform elongation and Rₘ is a typical (nominal) UTS within the specified band. The half-εu figure is a conservative strain limit for the analysis. Treat these as guidance for first-pass models; for critical work use a measured true stress–strain curve for the actual product and condition.
Ratings — engineering judgement
Weldabilitygood
Low carbon (~0.02%) gives good weldability by all common processes; preheat rarely needed in thin sections.
Machinabilitymoderate
Soft and gummy at low carbon — sharp tooling helps surface finish.
Corrosion resistancepoor
No inherent corrosion resistance — protect by paint, galvanising or plating in exposed use.
Hardenabilitylow
Limited hardenability at low carbon — surface hardening is possible but through-hardening is not.
Toughnessmoderate
Adequate toughness for general use at ambient temperature.
Indicative ratings derived from composition and family — engineering guidance, not specification values.
Physical properties
| Density | 7850 | kg/m³ |
| Elastic modulus | 210 | GPa |
| Shear modulus | 80.8 | GPa |
| Poisson's ratio | 0.30 | |
| Thermal expansion | 12.0 | ×10⁻⁶/°C |
| Thermal conductivity | 48 | W/(m·K) |
| Specific heat | 470 | J/(kg·K) |
| Magnetic | Yes |
Typical values for hot-dip coated if steel — use the mill certificate for the specific product.
Chemical composition (wt %)
Composition limits per EN 10346 for this hot-dip coated forming grade.
Available forms
Common applications
- Automotive body panels and structural pressings
- White goods and enclosures
- Deep-drawn and roll-formed components
- General light fabrication
History
Hot-dip metallic coating (galvanising and its zinc-alloy successors) married the formability of cold-rolled sheet to corrosion protection, making it the backbone of automotive, construction-cladding and white-goods sheet. EN 10346 defines the coated forming grades in parallel with EN 10130. DX57D is the IF, most-formable coated grade.
- 1837Hot-dip galvanising patented (Sorel), coating steel in molten zinc
- 1960Continuous hot-dip galvanising lines make coated coil a commodity
- 2009EN 10346 consolidates hot-dip coated (Z, ZA, AZ, ZM…) forming grades
This profile is generated from the grade's core data and family. Composition is decoded from the designation where its naming system defines it; physical properties are family-typical and ratings are indicative. Confirm critical values against the governing standard or the mill certificate. Equivalents, historical designations and hand-written expert notes are added per grade over time.