Materials & grades
DD11 / 1.0332 hot-rolled steel sheet and strip (EN 10111, close to ASTM A1011 CS, IS 1079 HR1, JIS SPHC)
DD11 (1.0332) is the commercial-quality grade of EN 10111, a low-carbon hot-rolled strip made for cold forming. Its nearest equivalents are ASTM A1011 CS Type B, IS 1079 HR1 and JIS G 3131 SPHC, but none of them is identical.
Names by standard
What it is called in each region
| Region | System | Designation | Norma | Match |
|---|---|---|---|---|
| USA | ASTM A1011 | CS Type BCommercial steel with a chemistry-only requirement (no tension test), so it is the nearest US counterpart rather than a match. CS Type B allows up to 0.15 % C and 0.60 % Mn. | ASTM A1011/A1011M | Closest equivalent |
| UK | BS EN 10111 | DD11The UK uses the European standard. | BS EN 10111 | Same material |
| BS 1449-1.1 (legacy) | HR1 / HR2Withdrawn. Moris pairs DD11 with HR2, while Indian and ISO practice uses HR1 for commercial quality; check the mill certificate if a drawing calls up a BS 1449 grade. | — | Closest equivalent | |
| EU | EN 10027-1 name | DD11 | EN 10111 | Same material |
| EN 10027-2 number | 1.0332 | EN 10111 | Same material | |
| DIN 1614 (legacy) | StW 22Superseded name for DD11. | — | Closest equivalent | |
| Índia | IS 1079 | HR1Commercial quality. Tensile maximum 440 MPa and elongation minimum 23 % match DD11 as published by Tata Steel; chemistry and yield limits differ in detail. | IS 1079:2017 | Closest equivalent |
| Japan | JIS G 3131 | SPHCCommercial quality. Adds a 270 MPa minimum tensile strength that EN 10111 does not set, and allows slightly higher phosphorus and sulphur. | JIS G 3131 | Closest equivalent |
On equivalence
- No equivalent is identical. DD11, ASTM A1011 CS Type B, IS 1079 HR1 and JIS SPHC all describe low-carbon commercial-quality hot-rolled sheet, but their limits are set differently.
- EN 10111 sets maximum yield and tensile strength; JIS G 3131 sets a 270 MPa minimum tensile strength; ASTM A1011 CS sets chemistry only. Do not substitute one for another where a mechanical limit is on the drawing.
- ASTM A1011 has no tension-test requirement for CS Type B, so the figures shown for it are chemistry limits, not mechanical guarantees.
- Sources disagree on the legacy UK name: Moris pairs DD11 with BS 1449 HR2, while other references pair BS 1449 HR1 with commercial quality. Treat the BS 1449 names as closest only.
- The IS 1079 grade tables could be read for tensile maximum and elongation only (from Tata Steel); the composition limits for HR1 were not found in a source we could verify.
Chemical composition
Composition limits, mass %
| Element | CS Type B (heat analysis)USA · ASTM A1011/A1011M | DD11 (1.0332)EU · EN 10111 | SPHCJapan · JIS G 3131 (as tabulated for SPHC) |
|---|---|---|---|
| C | ≤0.15 | ≤0.12 | ≤0.15 |
| Mn | ≤0.60 | ≤0.60 | ≤0.60 |
| P | ≤0.030 | ≤0.045 | ≤0.050 |
| S | ≤0.035 | ≤0.045 | ≤0.050 |
| Cr | ≤0.15 | — | — |
| Ni | ≤0.20 | — | — |
| Mo | ≤0.06 | — | — |
| V | ≤0.008 | — | — |
| Cu | ≤0.20 | — | — |
| Ti | ≤0.025 (higher where C ≥0.02 %, up to 3.4N + 1.5S) | — | — |
| Nb | ≤0.008 | — | — |
Mechanical properties
Strength and hardness
| Condition | Tensile strength | Yield strength | Elongation | Hardness |
|---|---|---|---|---|
| Hot rolled (EN 10111 DD11)Specified, thickness under 2 mm; yield is ReH or Rp0.2 as a range; elongation A80 (80 mm gauge)EN 10111 as tabulated by Nippon Steel Slovakia and ArcelorMittal | ≤440 MPa≤63.8 ksi | 170–360 MPa24.7–52.2 ksi | ≥23 % | — |
| Hot rolled (EN 10111 DD11)Specified, thickness 2 to under 3 mm; elongation A80EN 10111 as tabulated by Nippon Steel Slovakia and ArcelorMittal | ≤440 MPa≤63.8 ksi | 170–340 MPa24.7–49.3 ksi | ≥24 % | — |
| Hot rolled (EN 10111 DD11)Specified, thickness 3 to 11 mm; elongation A (5.65√S0 gauge)EN 10111 as tabulated by Nippon Steel Slovakia and ArcelorMittal | ≤440 MPa≤63.8 ksi | 170–340 MPa24.7–49.3 ksi | ≥28 % | — |
| Hot rolled (IS 1079 HR1)Specified; tensile maximum and elongation minimum as published by Tata Steel; no yield limit shown; ordering range 1.6 to 8 mmIS 1079 as published by Tata Steel (Astrum HR1) | ≤440 MPa≤63.8 ksi | — | ≥23 % | — |
| Hot rolled (JIS G 3131 SPHC)Specified; tensile is a minimum; elongation 27 % at 1.2 to under 1.6 mm, 29 % at 1.6 to under 3.2 mm, 31 % at 3.2 mm and overJIS G 3131 grade table as tabulated by Krakatau POSCO and BEBON Steel | ≥270 MPa≥39.2 ksi | — | 27–31 % | — |
| Supplied to ASTM A1011 CS Type BNo tension-test requirement: the grade is ordered to chemistry only, so yield, tensile and elongation are not specified or guaranteed by the standardASTM A1011/A1011M as described by SSAB | — | — | — | — |
In practice
Behaviour, heat treatment and uses
Characteristics
- Low carbon (≤0.12 %) and low alloy, so it forms, bends and welds readily with common processes; no preheat is normally needed in thin gauges.
- The lowest-formability grade of the DD11 to DD14 series: higher grades (DD12, DD13, DD14) trade strength for elongation.
- EN 10111 limits yield and tensile strength from above (maximums) so the steel stays soft enough to form; it is not a minimum-strength structural grade.
- Aluminium, silicon and carbon-equivalent limits are not set for DD grades in EN 10111, so weldability rests on the low carbon and manganese.
- Not intended for load-bearing structures where a guaranteed minimum yield is required; use S235JR or S355MC style grades there.
Heat treatment
- Supplied hot rolled from the coil; no heat treatment is applied or needed for forming.
- Not hardened: the carbon is too low to respond to quenching, and it is not case-hardened in normal practice.
- Stress relief or normalizing after heavy cold forming is possible but rarely specified; confirm with the forming drawing.
- Pickling and oiling (to remove scale) and hot-dip galvanizing are applied after forming or at the coil stage by agreement.
Usos típicos
- Pressed and formed automotive and truck chassis parts, brackets and cross-members
- Pipe and tube blanks, drums, cylinders and tanks
- Profiled sections, shelving, racks and storage systems
- General sheet-metal fabrications, covers and housings
- Blanks for cold forming, stamping and roll forming
Sheet and strip
Similar grades compared
| Grau | C % | Mn % | Cr % | Ni % | Tensile, first listed condition |
|---|---|---|---|---|---|
| DD11 / SPHC | ≤0.15 | ≤0.60 | ≤0.15 | ≤0.20 | ≤440 MPa |
| DD12 / SPHD | 0.02–0.08 | ≤0.45 | — | — | ≤420 MPa |
| DD13 / SPHE | ≤0.08 | ≤0.40 | — | — | ≤400 MPa |
| S355MC | ≤0.23 | ≤1.35 | ≤0.15 | ≤0.20 | 430–550 MPa |
| DC01 / SPCC | 0.02–0.15 | ≤0.60 | ≤0.15 | ≤0.20 | 270–410 MPa |
| DC03 / SPCD | 0.02–0.08 | ≤0.50 | ≤0.15 | ≤0.20 | 270–370 MPa |
| DC04 / SPCE | ≤0.06 | ≤0.50 | ≤0.15 | ≤0.20 | 270–350 MPa |
| DC05 / SPCF | ≤0.02 | ≤0.40 | ≤0.15 | ≤0.10 | 270–330 MPa |
| DC06 / SPCG | ≤0.02 | ≤0.40 | ≤0.15 | ≤0.10 | 270–330 MPa |
| DX51D / 1.0226 | 0.02–0.15 | ≤0.60 | — | — | 270–500 MPa |
Composition from the US standard where one exists, otherwise the first standard listed on each grade's page. Strength conditions differ between grades; open a grade for its full table.
Perguntas respondidas
Common questions
What is the equivalent of DD11 steel?
The closest equivalents are ASTM A1011 CS Type B, IS 1079 HR1 and JIS G 3131 SPHC. All are commercial-quality low-carbon hot-rolled sheet, but none matches EN 10111 exactly: the limits on strength, chemistry and testing differ.
Is DD11 the same as SPHC?
They serve the same purpose but are different specifications. SPHC requires a minimum tensile strength of 270 MPa and allows up to 0.050 % phosphorus and sulphur; DD11 limits yield and tensile strength from above and allows 0.045 % at most.
What are the DD11 yield and tensile strength?
EN 10111 gives DD11 a yield range of 170–360 MPa under 2 mm and 170–340 MPa from 2 to 11 mm, with tensile strength up to 440 MPa. These are limits, not typical values: actual coils fall inside them.
What is the difference between DD11, DD12, DD13 and DD14?
The number sets the forming quality. DD11 is commercial quality; DD12 and DD13 have lower carbon and manganese and higher elongation; DD14 is the most formable. Maximum tensile strength falls from 440 MPa (DD11) to 380 MPa (DD14).
Is DD11 weldable?
Yes. With at most 0.12 % carbon and 0.60 % manganese it welds readily by MIG, TIG and resistance processes. Weld procedures usually need no preheat in thin gauges.
From the Corona catalog
Products listed with DD11 / SPHC
Bobinas laminadas a quente
Espessura: 0,063-0,236 in / 1,6-6 mm · Largura: 36-80 in / 900-2.050 mm
Especificações
Chapas laminadas a quente
Espessura: 0,063-1 in / 1,6-25 mm · Tamanho da chapa: 48 x 96, 48 x 120, 60 x 120 in / 1.250 x 2.500, 1.250 x 6.300, 1.500 x 6.300 mm
EspecificaçõesKeep reading
Related references
References
Sources
- Nippon Steel Slovakia: EN 10111 drawing steels DD11 to DD14 — Yield, tensile and elongation by thickness band; heat-analysis C, Mn, P, S.
- ArcelorMittal Industry catalogue: EN 10111 hot-rolled grades — Yield, tensile, A80 and A5.65 by thickness; no Si, Al or CEV limit for DD grades.
- Arvedi: steels for cold deformation as per EN 10111 — Material numbers 1.0332, 1.0398, 1.0335, 1.0389; composition limits.
- DIN Media: EN 10111 Continuously hot rolled low carbon steel sheet and strip for cold forming — Scope and title of the standard (thickness up to 11 mm).
- Moris: DD11 steel grade — Lists DIN StW22 and a UK HR2 designation against DD11.
- Krakatau POSCO: hot-rolled coil specification table (MS 1705, JIS grade names SPHC, SPHD, SPHE) — Composition, tensile minimum and elongation by thickness for SPHC, SPHD and SPHE as tabulated for the Malaysian standard that uses the JIS grade names.
- Tata Steel DigECA: Tata Astrum IS 1079 HR1 — Tensile maximum 440 MPa, elongation minimum 23 %.
- Tata Steel DigECA: steel grade chart India — IS 1079 HR1 to HR4 described as commercial, drawing, deep drawing and extra deep drawing quality.
- ASTM A1011/A1011M: hot-rolled carbon, structural, HSLA and UHSS sheet and strip (abstract) — Scope: CS, DS, SS, HSLAS, HSLAS-F and UHSS designations; the standard text is paywalled.
- SSAB: ASTM A1011 CS Type B — CS Type B heat-analysis limits; chemistry only, no mechanical requirements.
- BEBON Steel: JIS G 3131 SPHC and SPHD — SPHC and SPHD C, Mn, P, S limits; 270 MPa minimum tensile; SPHC elongation 27/29/29/29/31/31 % by thickness band from 1.2 mm.
- thyssenkrupp Steel: product information deep-drawing steels DD, DC and DX — EN 10111 DD11 to DD14 composition, yield, tensile and elongation.
Values summarize published limits and typical data. The governing standard and the current edition control; check them before specifying.