Steel DD11-SP (Skin passed / temper rolled)
Finish state
EN DD11
Light temper pass to improve flatness and suppress stretcher strains (Lüders lines) on visible pressed panels; slightly higher yield, slightly lower elongation.
Values for the SP condition
Other DD11 tempers and conditions
DD11 is listed in 4 conditions; see the grade overview at DD11.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Normalized | Optional post-fabrication normalizing (~900 °C, air cool) to refine grain and restore ductility after severe cold work; not a standard mill delivery condition. | 210 | 360 | 35 | 105 HB | 11 % IACS |
HRPODefault Hot rolled, pickled and oiled | Standard stocked condition: descaled, clean surface, ready for cold forming, welding and painting. | 220 | 380 | 32 | 110 HB | 11 % IACS |
Hot rolled | Cheapest supply form for weldments and parts that will be shot-blasted or heavily painted; scale must be removed before forming dies or plating. | 225 | 385 | 31 | 112 HB | 11 % IACS |
SPThis page Skin passed / temper rolled | Light temper pass to improve flatness and suppress stretcher strains (Lüders lines) on visible pressed panels; slightly higher yield, slightly lower elongation. | 250 | 395 | 29 | 118 HB | 11 % IACS |
What is DD11-SP?
DD11-SP is DD11 supplied in the SP condition — light temper pass to improve flatness and suppress stretcher strains (Lüders lines) on visible pressed panels; slightly higher yield, slightly lower elongation. DD11-SP has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 395 MPa (57.3 ksi) — weaker than 94% of steel grades. Elongation at break is 29% and the elastic modulus is 210 GPa (30.5 Msi). DD11-SP has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,490°C (2,714 °F). HRPO is the default condition FabDigit quotes; SP is available on request or by drawing note.
Advantages
- High electrical conductivity — 11 % IACS, better than 98% of steel grades
- Readily welded — 95/100, better than 97% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
- Ductile — tolerates forming and impact — 29%, better than 91% of steel grades
- Forms and bends easily — 72/100, better than 88% of steel grades
Limitations
- Low strength — 250 MPa (36.3 ksi), worse than 94% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
DD11-SP properties
Typical room-temperature values for DD11-SP; 22 are specific to this condition. Other listed values are DD11 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
DD11-SP has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,490°C (2,714 °F).
Mechanical16
DD11-SP has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 395 MPa (57.3 ksi) — weaker than 94% of steel grades. Elongation at break is 29% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
DD11-SP is rated for continuous service to 350°C (662 °F). It conducts heat at 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
DD11-SP 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 DD11-SP takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
DD11-SP's machinability is good (60/100, better than 83% of steel grades); weldability excellent (95/100); formability very good (72/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with DD11-SP
Is DD11 easy to machine?
Soft and gummy — use sharp positive-rake tools, generous feed and coolant to avoid built-up edge and burrs; expect ~60 % of AISI 1212 speeds.
Can DD11 be welded?
Excellent for MIG/MAG, TIG, resistance spot and laser welding with ER70S-6 class filler; CEV ≈0.20–0.25 so no preheat needed at typical sheet gauges.
Can DD11 be formed, bent or molded?
Good for bending, roll forming and moderate stamping (bend radius ≈1×t transverse); for deep drawing step up to DD12/DD13 or a cold-rolled DC grade.
What surface finishes work on DD11?
No anodizing; protect by painting, powder coating, zinc phosphating, electro-zinc or hot-dip galvanizing — bare surface rusts within days in humid air.
DD11 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 |
|---|---|---|
| Cladle analysis, EN 10111 | ≤ 0.12 | 0.08 |
| Mn | ≤ 0.6 | 0.4 |
| P | ≤ 0.05 | 0.02 |
| S | ≤ 0.05 | 0.02 |
| Fe | balance | — |
DD11-SP — frequently asked
What is DD11-SP used for?
DD11-SP is typically used for brackets, simple stampings, structural tube skelp and general fabrication. In short: cheapest formable hot band; weldable without preheat; entry-level DD grade.
What is the yield strength of DD11-SP?
DD11-SP has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 395 MPa (57.3 ksi) — weaker than 94% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is DD11-SP easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Soft and gummy — use sharp positive-rake tools, generous feed and coolant to avoid built-up edge and burrs; expect ~60 % of AISI 1212 speeds.
Can DD11-SP be welded?
Yes — weldability is rated excellent (95/100). Excellent for MIG/MAG, TIG, resistance spot and laser welding with ER70S-6 class filler; CEV ≈0.20–0.25 so no preheat needed at typical sheet gauges.
What surface finishes work on DD11-SP?
No anodizing; protect by painting, powder coating, zinc phosphating, electro-zinc or hot-dip galvanizing — bare surface rusts within days in humid air.
Can DD11-SP be formed, bent or molded?
Good for bending, roll forming and moderate stamping (bend radius ≈1×t transverse); for deep drawing step up to DD12/DD13 or a cold-rolled DC grade.
What is the maximum service temperature of DD11-SP?
DD11-SP 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 DD11 HRPO and DD11-SP?
HRPO is the default condition — standard stocked condition: descaled, clean surface, ready for cold forming, welding and painting. SP: light temper pass to improve flatness and suppress stretcher strains (Lüders lines) on visible pressed panels; slightly higher yield, slightly lower elongation. Yield strength is 220 MPa in HRPO versus 250 MPa in SP.
Sources
- EN 10111 — Continuously hot rolled low carbon steel sheet and strip for cold forming — CEN (2008)
- EN 10025-1 / EN 10027-2 material number 1.0332 — CEN (2019)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ASM Handbook Vol.13A — Corrosion — ASM International (2003)
- GB/T 912 / SPHC comparable hot-rolled low carbon sheet — SAC (2008)
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.