T9
1 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 T9 →Material demand assessment
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T9 · GB/T 1298-2008
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Tool steels
- Material form
- Carbon tool steel (source classification)
- Original record status
- Original standard verified
- Standard edition
- GB/T 1298-2008
- Table / clause
- Main text: Table 1, row 4 / Table 2
- PDF page references
- 5
- Unit
- Mass fraction (%)
- Analysis type
- Ladle analysis
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.85 ～ 0.94 |
| Mn | ≤ 0.4 (lower limit not stated) |
| Si | ≤ 0.35 (lower limit not stated) |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Cu | ≤ 0.25 (lower limit not stated) |
| Cr | ≤ 0.25 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| W | ≤ 0.3 (lower limit not stated) |
| Mo | ≤ 0.2 (lower limit not stated) |
| V | ≤ 0.02 (lower limit not stated) |
Applicability and limitations
GB/T 1298—2008, main-text Table 1, row 4 and Table 2; heat-analysis composition, mass fraction %. This record covers quality steel without the A suffix. Higher-quality steel requires suffix A and its own P≤0.030% and S≤0.020% limits, which must not be applied to this default record. Residual Cu, Ni, Cr and their total for steel intended for lead-patented wire have separate limits, to be verified against the original notes to Table 2. Table 3: Brinell hardness in the annealed condition ≤192 HBW. Cold-drawn after annealing ≤241 HBW and Rockwell hardness of the table-specified quenched specimen ≥62 HRC depend on delivery, specimen and process conditions. These are original-clause references, not unconditional property guarantees for every product of this grade.