T9 steel is a high-grade carbon tool steel, cold work die steel. It is high carbon steel with a carbon content of more than 0.6%. The steel has high hardness and wear resistance. Medium toughness.

T9 Steel

T9 Steel Worldwide Equivalents

GradeCr12MoVSK4W1A-8 1/2Y9TC90

T9 Steel Chemical Composition


T9 Steel Mechanical Properties

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated ConditionBrinell hardness (HBW)
937 (≥)768 (≥)134213Solution and Aging, Annealing, Ausaging, Q+T,etc314

T9 Steel Physical properties

Temperature T
Specific heat
J / kgK
Modulus of elasticity
219 (≥)894 (≥)3133324
Creep strain limit
(Rp1,0) N/mm2
Creep rupture strength
(Rp1,0) N/mm2
Thermal conductivity
Electric resistance
63461539223Solution and Aging, Annealing, Ausaging, Q+T,etc

Heat Treatment 

Ordinary annealing

(740-750)°C×(2-4)h. With a cooling rate of <30°C/h, slowly furnace-cool to a temperature of 500-600°C, and air-cool the furnace.

Isothermal spheroidizing annealing

(740-750) ℃ × (2-4) h. (650-680) ℃ × (4-6) h, after furnace cooling to 500-600 ℃, air cooling, hardness ≤ 192HBS.

Quenching, tempering

The quenching temperature is 770-790℃. Water cooling, water-oil double-liquid cooling or alkali bath cooling, quenching hardness 62HRC. The tempering temperature is 180±10℃.


1. It is suitable for various small and medium batch production molds. Such as cold heading punches.

2. Tools for impact load resistance, such as scrapers.

T9 products

Product typeProductsDimensionProcessesDelivery States
Plates/SheetsPlates/Sheets0.08-200mm(T)*W*LForging, hot rolling, and cold rollingAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel BarRound Bar, Flat Bar, Square BarΦ8-1200mm*LForging, hot rolling and cold rolling, CastBlack, Rough Turning, Shot Blasting,
Coil/StripSteel Coil/Steel Strip0.03-16.0x1200mmCold-Rolled&Hot-RolledAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes/TubesSeamless Pipes/Tubes, Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion, Cold Drawn, WeldedAnnealed, Solution and Aging, Q+T, ACID-WASHED