08AL
2 source records. Standards, editions and conditions are presented separately; matching grade names do not establish interchangeability.
Refer to each source for mass fractions and analysis type. Missing values are not treated as 0. Manufacturer typical values, standard guarantees and measured heat results must remain separate. Use the material selector for calculations and condition selection.
Open condition selection, comparison and carbon-equivalent tools for 08AL →08Al · GB/T 699-2015
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Carbon steel
- Subcategory
- Quality carbon structural steel
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 699-2015
- Table / clause
- Table 1 and notes a and b; clauses 6.1.2 and 6.1.3
- PDF page references
- 5、6
Original composition-element notation and analysis basis
- Al
- Original element symbol
- Total aluminum
- Subscript in the original source
- t
- Additional source notes
- Alₜ
- Additional source notes
- Note b to the original Table 1 explicitly specifies total aluminum; do not mix it with acid-soluble aluminum or aluminum of unspecified analysis type.
- PDF page references
- 6
- Table / clause
- Table 1, Note b
- Analysis type
- Total aluminum
- Unit
- Mass fraction (wt%)
When the original analysis designations differ, or a record leaves them unspecified, comparability or a match cannot be concluded directly. Subscripts not explained by the source are not expanded here.
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | ≤ 0.11 (lower limit not stated) |
| Si | ≤ 0.03 (lower limit not stated) |
| Mn | ≤ 0.45 (lower limit not stated) |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Cr | ≤ 0.1 (lower limit not stated) |
| Ni | ≤ 0.3 (lower limit not stated) |
| Cu | ≤ 0.25 (lower limit not stated) |
| Total aluminum | 0.02 ～ 0.07 |
Applicability and limitations
GB/T699-2015 Table 1 Note b; Al denotes total aluminum Alt.. ; No restriction on the C/Mn lower bounds means neither actual content may be assumed to be 0. ; Table 1 of GB/T699-2015 gives heat-analysis mass fractions wt%; Product-analysis tolerances are listed separately under GB/T222.
Verification notes
Table 1, note b expressly names Al deoxidized killed steel08Al · GB/T 699-1999
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Carbon steel
- Material form
- Quality carbon structural steel (source classification)
- Original record status
- Original standard verified
- Standard edition
- GB/T 699-1999
- Table / clause
- Main text: Table 1 / Table 2 / 6.1.1.5
- PDF page references
- 5、6
- Unit
- Mass fraction (%)
- Analysis type
- Ladle analysis
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.05 ～ 0.11 |
| Si | ≤ 0.03 (lower limit not stated) |
| Mn | 0.25 ～ 0.65 |
| Cr | ≤ 0.1 (lower limit not stated) |
| Ni | ≤ 0.3 (lower limit not stated) |
| Cu | ≤ 0.25 (lower limit not stated) |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Al | 0.02 ～ 0.07 |
Applicability and limitations
Clause 6.1.1.5: when 08 steel is Al-deoxidized killed steel, it is designated separately as 08Al; Mn≥0.25%、Si≤0.03%、Al0.02—0.07%. ; Original Table 2 defaults to quality steel with P and S each ≤0.035%; Higher and special quality levels must be selected separately.