DC03
EN 10130 · 1.0355
DC03 is a sheet-forming steel (Cold Rolled family) to EN 10130 (1.0355). It has a specified 0.2 % proof stress of 140 MPa and a typical tensile strength of about 285 MPa, with a uniform elongation of 36 %. Nominal carbon content is around 0.10 %. For nonlinear FEA, a bilinear model uses E = 210 GPa up to yield and a tangent modulus of 406 MPa above it. It is a general-purpose wrought steel selected on strength, cost and availability.
Bilinear material model — nonlinear FEA
Uniform elongation εu = 36.0% · conservative analysis limit ½εu = 18.0%
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 (~0.10%) 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 cold rolled steel — use the mill certificate for the specific product.
Chemical composition (wt %)
Composition limits per EN 10130 for this cold-rolled 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
The cold-rolled low-carbon forming steels grew out of the mass automotive and appliance pressing industry, which needed thin sheet that could be drawn into complex shapes without splitting. EN 10130 unified the European family, grading it purely by how severely it can be formed. DC03 is a deep-drawing quality, mid-family.
- 1934Continuous cold rolling and annealing scales up flat sheet for car bodies
- 1970Interstitial-free (IF) steelmaking (vacuum degassing) enables ultra-formable grades
- 1991EN 10130 harmonises the cold-rolled forming grades DC01–DC06
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.