A569 is now A1011 CS: what changed and how to weld it
ASTM A569 covered hot-rolled carbon steel sheet and strip of commercial quality with up to 0.15 % carbon. ASTM withdrew it in 2000 and replaced it with A1011; the commercial-steel designation there is A1011 CS, usually Type B. The nearest European sheet is DD11 (1.0332).
Short answer
A569 equivalent: A1011 CS Type B, EN DD11 (1.0332). Chemistry limits are low (C ≤ 0.15 %, Mn ≤ 0.60 %), CE (IIW) from the upper limits is 0.31, well below the 0.40 band edge, so this sheet welds without preheat. ISO/TR 15608 group 1.1. MIG with ER70S-6 or a rutile stick electrode does the job.
Grade card
| Designation and standard | ASTM A1011 CS · ASTM A569 → A1011 |
|---|---|
| Closest equivalent | DD11 (EN 10111) |
| Material number | 1.0332 |
| GOST | 08пс, Ст2пс |
| AISI / ASTM | A1011 CS (ex A569) |
| PN | — |
| ISO/TR 15608 group | 1.1 — carbon steel within group 1 chemistry and with no specified yield above 275 MPa |
| Weldability (equivalents table) | good, no preheat |
The EN, GOST, AISI/ASTM and PN rows come from the steel grade equivalents table. An equivalent is the closest grade, not an identical one.
A569 and A1011 CS are bought to chemistry, not to strength: Alro notes that physical properties are generally not supplied unless requested before production. For a guaranteed yield, A1011 has the SS (structural) and HSLAS grades; the equivalents table pairs A1011 SS Gr. 40 (ex A570) with S275JR. SSAB states the A1011 range as thicknesses under 0.230 in (5.8 mm).
ASTM A1011 CS chemical composition, % by mass
| Element | A1011 CS Type B |
|---|---|
| C | ≤ 0.15* |
| Mn | ≤ 0.60 |
| P | ≤ 0.030 |
| S | ≤ 0.035 |
| Cr | ≤ 0.15 (SSAB) |
| Ni | ≤ 0.20 (SSAB) |
| Mo | ≤ 0.06 (SSAB) |
| V | ≤ 0.008 (SSAB) |
| Nb (Cb) | ≤ 0.008 (SSAB) |
| Ti | ≤ 0.025 (SSAB) |
Source: Alro, A1011 CS Type B; SSAB, ASTM A1011 CS Type B.
* Alro gives C 0.02–0.15 %, SSAB a maximum of 0.15 %. Elements marked SSAB come from one source only.
Carbon equivalent: CE, CET and the CEV limit
| Value | Formula | Result | Basis |
|---|---|---|---|
| CE (IIW) | C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 | 0.31 | upper composition limits from the table |
| CET | C + (Mn+Mo)/10 + (Cr+Cu)/20 + Ni/40 | 0.23 | upper composition limits from the table |
From the upper composition limits, CE falls in the calculator band: Good — No preheat needed, ordinary electrodes.
Copper is not counted: SSAB lists it only for copper-bearing steel, with a minimum of 0.20 %. Even with that added, CE stays under 0.40.
Enter the analysis from your mill certificate in the carbon equivalent calculator: the link opens it with the composition limits from this page, ready to overwrite.
Preheat and interpass temperature
No preheat. The calculator formula is set up for 10–90 mm, and on sheet this thin with CE under 0.40 there is nothing to calculate; dry a cold or wet sheet before welding. The risk on thin sheet is burn-through and distortion, not cracking.
Filler metal
| Process | Filler | Gas |
|---|---|---|
| 135 — MAG, solid wire | ER70S-6 / G3Si1 | CO₂ · Ar + 15–20 % CO₂ |
| 111 — stick (MMA) | E 42 0 RR 12 — ESAB OK 43.32; E 42 4 B 42 H5 — Lincoln Basic 7018 | — |
ER70S-6 / G3Si1 in CO₂ or Ar + 15–20 % CO₂ is the default; silicon and manganese in the wire deal with mill scale. For stick, a rutile E 42 0 RR 12 (ESAB OK 43.32) runs easily on thin sheet; a basic electrode is only needed where the joint is loaded or cold-sensitive.
How to weld it
- Remove scale and oil at the joint: hot-rolled sheet carries mill scale that causes porosity.
- Short arc, low heat: tack at short intervals and weld in short runs to limit distortion.
- Thickness by gauge: if the drawing gives a gauge number, convert it with the sheet gauge table.
- Settings for MIG on thin sheet: wire feed calculator.
Substituting the equivalent: what changes in the paperwork
A drawing that says A569 is read as A1011 CS Type B, its successor in ASTM. If you buy DD11 to EN 10111 instead, check the certificate — it is a close grade, not the ASTM one.
In the WPS, write A1011 CS (or DD11) and group 1.1.
Where the figures come from
- ASTM, A569/A569M-98 (withdrawn 2000, replaced by A1011/A1011M)
- Alro, A1011 CS Type B
- SSAB, ASTM A1011 CS Type B
- ISO/TR 15608:2013, tab. 1 (later ISO/TR 15608:2017; replaced by ISO 15608:2025)
Figures from distributor and manufacturer datasheets are for information; for a given delivery, the EN 10204 3.1 certificate decides. CE, CET and preheat are calculated when the page is shown, with the same formulas as the calculators.
Frequently asked questions
What is the difference between A569 and A1011?
A569 was the old ASTM specification for commercial-quality hot-rolled carbon sheet and strip with up to 0.15 % C. ASTM withdrew it in 2000 and replaced it with A1011, which combines commercial, drawing, structural and high-strength low-alloy sheet in one standard. The A569 material is now ordered as A1011 CS, usually Type B.
What is the ASTM A569 equivalent?
A1011 CS Type B in ASTM, and DD11 (1.0332) in EN; the GOST column of the equivalents table gives 08пс and Ст2пс. These are close grades for the same use, forming and welding of thin sheet.
What is the chemical composition of A1011 CS Type B?
C up to 0.15 % (Alro: 0.02–0.15 %), Mn up to 0.60 %, P up to 0.030 %, S up to 0.035 % (Alro, SSAB). SSAB also gives Cr 0.15, Ni 0.20, Mo 0.06, V 0.008, Nb 0.008 and Ti 0.025 % maximum.
Does A1011 CS need preheat?
No. CE (IIW) from the upper composition limits is 0.31, under the 0.40 edge below which our calculator calls for no preheat, and the sheet is under 6 mm thick.
What are the mechanical properties of A1011 CS?
For CS they are not a requirement: the grade is bought to chemistry, and Alro notes properties are generally not supplied unless requested before production. If you need a guaranteed yield, order a structural grade such as A1011 SS.
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