Steel DD13
EN DD13
DD13 (1.0335) is a hot-rolled low-carbon steel in the EN 10111 DD family with improved cold formability over DD11, achieved through lower carbon and killed, aging-resistant chemistry.
Reference datasheet — DD13 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the HR condition
DD13 tempers and conditions
DD13 is supplied in 3 conditions, soft to hard. HR is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot rolled, pickled and oiled | Choose pickled and oiled hot-rolled sheet when a scale-free, corrosion-protected surface is needed for direct stamping, welding and later painting or galvanizing. | 225 | 335 | 37 | 103 HB | 11 % IACS |
HRDefault Hot rolled | Use this as-rolled hot band with mill scale as the most common stock condition for general formed parts that will be stamped, bent and then painted. | 230 | 340 | 36 | 105 HB | 11 % IACS |
Hot rolled, skin-passed | Pick skin-passed (temper rolled) sheet to suppress the yield plateau and Lüders bands and improve flatness on visible stampings, accepting slightly lower formability. | 245 | 345 | 34 | 110 HB | 11 % IACS |
Supply forms, finishes and certifications
Ways DD13 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
HDG | Hot rolled substrate, hot-dip galvanized | Coating |
What is DD13?
DD13 (1.0335) is a hot-rolled low-carbon steel in the EN 10111 DD family with improved cold formability over DD11, achieved through lower carbon and killed, aging-resistant chemistry. Engineers choose it for hot-rolled parts that still need tight bend radii, flanging or light drawing, at 230 MPa yield, 340 MPa tensile and 36 % elongation; forms include hot-rolled coil and sheet, pickled (HR-PO), skin-passed (HR-SP) and hot-dip galvanized (HDG). Strength remains low and bare surface has no corrosion resistance, so paint or zinc is required. DD11 is cheaper where bend radii are relaxed. DD13 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). DD13 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 340 MPa (49.3 ksi) — weaker than 97% of steel grades. Elongation at break is 36% and the elastic modulus is 210 GPa (30.5 Msi).
What is DD13 used for?
- chassis brackets
- wheel rims
- structural stampings
Advantages
- Readily welded — 96/100, better than 100% of steel grades
- Ductile — tolerates forming and impact — 36%, better than 98% of steel grades
- Conducts heat well — 52 W/m·K (30 BTU/hr·ft·°F), better than 98% of steel grades
- High electrical conductivity — 11 % IACS, better than 98% of steel grades
- Forms and bends easily — 90/100, better than 98% of steel grades
Limitations
- Low strength — 230 MPa (33.4 ksi), worse than 97% of steel grades
- Hard to polish — 40/100, worse than 96% of steel grades
DD13 properties
Typical room-temperature values for DD13-HR; bars are the position among steel grades.
Physical3
DD13 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).
Mechanical15
DD13 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 340 MPa (49.3 ksi) — weaker than 97% of steel grades. Elongation at break is 36% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
DD13 is rated for continuous service to 350°C (662 °F). It conducts heat at 52 W/m·K (30 BTU/hr·ft·°F), better than 98% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
DD13 conducts electricity at 11 % IACS, better than 98% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of DD13 takes about 23 MJ of energy and emits 2 kg of CO₂ — less than 98% of steel grades. Typical recycled content is 25%.
Manufacturability7
DD13's machinability is good (58/100, better than 75% of steel grades); weldability excellent (96/100); formability excellent (90/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. DD13 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with DD13
Is DD13 easy to machine?
Very soft and free-cutting but gummy and burr-prone — use sharp, high positive-rake tools, higher cutting speeds and ample coolant; drilling and punching present no difficulty.
Can DD13 be welded?
Carbon equivalent is very low, so resistance spot, MAG, laser and seam welding need no preheat or post-weld heat treatment, and the heat-affected zone does not harden.
Can DD13 be formed, bent or molded?
Deep drawing, flanging and small-radius bending are better than DD11/DD12; killed-steel supply avoids Lüders bands from aging, and skin-passed or pickled sheet is recommended before forming.
DD13 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 |
|---|---|---|
| Cheat analysis maximum (EN 10111) | ≤ 0.08 | 0.05 |
| Mn | ≤ 0.4 | 0.25 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Altotal Al, killed steel deoxidation (optional requirement) | ≥ 0.02 | 0.04 |
| Fe | balance |
What surface finishes work on DD13?
Pickle to remove scale, then phosphate, e-coat, powder coat or hot-dip galvanize; bare material shows rust within days in humid environments.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel DD13 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0335
How much does DD13 cost?
DD13 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
DD13 — frequently asked
What is DD13 used for?
DD13 is typically used for chassis brackets, wheel rims and structural stampings. In short: most formable hot band; tight bends without cold-rolled cost; aging-resistant killed steel.
What is the yield strength of DD13?
DD13 has a typical yield strength of 230 MPa (33.4 ksi) and a tensile strength of 340 MPa (49.3 ksi) — weaker than 97% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is DD13 easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Very soft and free-cutting but gummy and burr-prone — use sharp, high positive-rake tools, higher cutting speeds and ample coolant; drilling and punching present no difficulty.
Can DD13 be welded?
Yes — weldability is rated excellent (96/100). Carbon equivalent is very low, so resistance spot, MAG, laser and seam welding need no preheat or post-weld heat treatment, and the heat-affected zone does not harden.
What surface finishes work on DD13?
Pickle to remove scale, then phosphate, e-coat, powder coat or hot-dip galvanize; bare material shows rust within days in humid environments.
Can DD13 be formed, bent or molded?
Deep drawing, flanging and small-radius bending are better than DD11/DD12; killed-steel supply avoids Lüders bands from aging, and skin-passed or pickled sheet is recommended before forming.
What is the maximum service temperature of DD13?
DD13 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between DD13-HR and DD13 HR-SP?
HR is the default condition — use this as-rolled hot band with mill scale as the most common stock condition for general formed parts that will be stamped, bent and then painted. HR-SP: pick skin-passed (temper rolled) sheet to suppress the yield plateau and Lüders bands and improve flatness on visible stampings, accepting slightly lower formability. Yield strength is 230 MPa in HR versus 245 MPa in HR-SP.
How much does DD13 cost?
DD13 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10111 — Continuously hot rolled low carbon steel sheet and strip for cold forming — CEN (2008)
- ASTM A370 — Mechanical Testing of Steel Products (hardness/strength conversions) — ASTM (2022)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- worldsteel LCI data for hot rolled coil — World Steel Association (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.