Cold Rolled Steel Coil DS Type A/B/C ASTM
- DS = Drawing Steel
Indicates that the steel is designed for the drawing, stamping, forming process and has better ductility and formability than the basic grade (CS - Commercial Steel).
- Type A, B, C = Sub-type
Distinguishes the range of mechanical properties and chemical composition requirements (especially carbon, manganese, phosphorus content) of different grades.
DS Type A Cold Rolled Steel Coil
The stamping performance is slightly lower than Type B, with slightly higher strength and lower cost.
Suitable for simple stamping or bending parts (such as structural parts, tool boxes) that do not require high formability.
Specifications
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| Characteristic | DS Type A | DS Type B | DS Type C |
|---|---|---|---|
| Main goal | Basic punching performance | Standard punching performance | Higher punching performance |
| Strength and hardness | Relatively high | Medium | Relatively low |
| Scalability | Basic level | Common level | Better |
| Chemical composition restrictions | Relatively loose | Moderate | Stricter |
|---|---|---|---|
| Phosphorus content (P) | ≤0.025% | ≤0.025% | ≤0.02% |
| Applicable scenarios | Simple stamping/bending | Most stamping parts | Complex shapes/deep drawing |
Typical Applications
DS Type A Cold Rolled Steel: Economical basic stamping
Applicable parts:
✅ Flat/shallow bending structural parts (shelf layers, tool boxes)
✅ Low stress covering parts (electric control box housing, distribution cabinet door panels)
✅ Agricultural machinery brackets (harvester baffles, seed drill hoppers)
Prohibited scenarios:
❌ Deep stamping (depth > 50mm)
❌ Parts with bulging rate > 15%
Selection Recommendation
Prefer DS Type B: covers most stamping needs and is cost-effective.
Need deep drawing or complex forming → choose DS Type C or upgrade to DDS series.
Simple processing/cost-sensitive → DS Type A or CS series.
Relationship with other grades of American Standard
Basic grade: CS Type A/B/C (Commercial Steel) → For general use (such as SPCC/DC01).
Deep drawing grade: DDS Type A/B/C (Deep Drawing Steel) → Better performance than DS type, used for complex deep drawing parts (such as SPCE/DC05).
Extra deep drawing grade: EDDS (Extra Deep Drawing Steel) → Highest formability (such as DC06/SPCF).
Packaging and Shipping
