T10

Data verified

T10 is the ~1.0% carbon tool steel of GB/T 1299, harder and more wear-resistant than T8/T7 — the Chinese standard grade for taps, dies and cutting edges of simple tools.

Hardness58–62 HRC

DIN1.1645 (C105W1, near)

AISIW1 family (near)

JISSK105

CategoryTool Steel

Chemical composition

Element	Content (%)
C	0.95–1.04
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

Quench 770–800 °C water (thin sections may oil-quench); temper 150–200 °C.

Equivalent grades

Standard	Designation
din	1.1645 (C105W1, near)
aisi	W1 family (near)
jis	SK105
gb	T10 (GB/T 1299)

Compare side by side: T10 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: Taps, dies, reamers, punches, saw blades, drawing dies (light).

Processing: Water hardening risks cracking on intricate shapes — for complex dies step up to 9SiCr or CrWMn oil-hardening grades.

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Source: 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.