Description

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

/ChinaJapanUSARussiaIOS
StandardGBJISAISI/SAEroct
GradeCr12MoVSK4W1A-8 1/2Y9TC90

T9 Steel Chemical Composition

CSiMnSPCrNiCu
0.80-0.90≤0.35≤0.50≤0.030≤0.035≤0.20≤0.25≤0.30

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

PropertyDensity
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Modulus of elasticity
kN/mm2
219 (≥)894 (≥)3133324
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
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℃.

Application

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