T8
Data verifiedT8 is the GB/T 1299 carbon tool steel of the W1 family — a plain 0.80% carbon water-hardening steel for hand tools, punches and woodworking blades.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.75–0.84 |
| Si | ≤0.35 |
| Mn | ≤0.40 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Hardness (hardened) | 58–62 HRC |
| Density | 7.85 g/cm³ |
Heat treatment
Water quench 780–800 °C (oil for thicker or intricate parts); temper 150–250 °C.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.1620 (C80W1, near) |
| aisi | W1 family (near) |
| jis | SK80 |
| gb | T8 (GB/T 1299) |
Compare side by side: T8 vs W1
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Chisels, punches, hammers, woodworking tools, shear blades (light), agricultural edges.
Processing: Cheap and easy to harden with basic equipment; shallow hardening — expect a hard case over a tough core in thick sections.
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Ask for a quotationVisit NasteelSource: GB/T 1299 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.