WALDUN is one of the best T1 steel manufacturers and suppliers in China. You can get supplied T1 steel in round bar,square bar,flat bar,plate,sheet and wire.

T1 Steel is the most widely used tungsten type of high speed steel according to ASTM/A600 standard.As original HSS,T1 steel has good abrasion resistance, high toughness, high hardness (62~66HRC) ,good red hardness,and easy to grinding. T1 steel can still keep the cutting performance of cutting tools when working temperature is below 600 ℃.The general purpose T1 tool steels and the high-vanadium-cobalt T15 are most commonly used in the T series.

T1 Steel Supply Form & Size & Tolerance

Round bar
Diameter	1-16mm	10-50mm	50-180mm	180-300mm
Process	Cold Drawn	Hot Rolled	Hot Forged	Free Forging
Flat bar
Thickness	1-2.5mm	1.5-20mm	20-300mm
Width	Max 800mm	Max 800mm	Max 800mm
Process	Cold Drawn	Hot Rolled	Hot Forged

Remark:Tolerance can be customized as per requests

T1 Steel Chemical Composition

Standard	Grade	C	Mn	P	S	Si	Cr	Mo	V	W
ASTM A600	T1	0.65-0.80	0.10-0.40	0.03	0.03	0.20-0.40	3.75-4.50	–	0.90-1.30	17.25-18.75
DIN ISO 4957	1.3355	0.70-0.78	0.4	0.03	0.03	0.45	3.80-4.50	–	1.00-1.20	17.50-18.50
GB/T 9943	W18Cr4V	0.70-0.80	0.10-0.40	0.03	0.03	0.20-0.40	3.80-4.40	0.3	1.00-1.40	17.5-19.00
JIS G4403	SKH2	0.73-0.83	0.4	0.03	0.03	0.45	3.80-4.50	–	1.00-1.20	17.20-18.70

T1 Steel Physical Property

Density	8.67g/cm3
Thermal expansion （ 20-200 °Cmore ， untreated)	9.7 x 10 -6 /ºC
Thermal conductivity (100 °Cmore ， untreated)	19.9 x W/m-K

T1 Steel Mechanical Property

Hardness, Rockwell C	63.0 – 65.0
Poisson’s ratio	0.27-0.30
Elastic modulus	190-210 GPa

T1 Steel Forging

Pre heat the AISI T1 with two steps.First,heat slowly and uniformly to 850-900°C with a rate not exceeding 220°C per hour,second,heat more quickly to the forging temperature of 1050-1150°C.Re-heating is necessary when temperature below 950°C. Slow cooling in furnace after forging.

T1 Steel Annealing

Annealing must be performed after hot working and before re-hardening.Heat the temperature to 850 to 900°C with a rate not exceeding 220°C per hour.Controlled slow cooling in furnace at 10 to 20°C per hour to approximately 700°C, followed by cooling in still air. Hardness after annealing 270 Brinell, maximum.

T1 Steel Stress Relieving

It is recommended to stress relieve after machining and prior to hardening to minimise the possibility of distortion.Heat in a neutral atmosphere to the  temperature of 600 to 700°C, and  soak for approximately two hours,followed by slow cooling in the furnace.

T1 Steel Hardening

Pre heat in two steps at 450-500°C and 850-900°C,then austenitising at a temperature suitable for chosen working temperature.Hardening in a protective atmosphere,for furnace 1270-1300°C,for salt bath 1250-1280°C.

T1 Steel Tempering

Tempering should be carried out immediately after quenching. Heat slowly and uniformly to the tempering temperature,soak well not less than 2 hours(one hour per 25mm of total thickness).Double tempering is recommended. Recommended temperature is 530-580°C for cutting tools. 590-650°C for shock tools.

T1 Steel Guidelines for Hardening&Tempering

TOOL	T1
	Hardening	Tempering(twice)
Single-edge cutting tools	1280°C	550°C – 570°C
Multi-edge cutting tools	1180°C – 1280°C	550°C – 570°C
Cold work tools	1150°C – 1200°C	550°C – 570°C

T1 Steel Application

T1 tool steel is usually used in the manufacture of all kinds of cutting tools,such as turning tool,milling cutter,reamer,drill bit,saw blade,twist drill, also highly suitable for cold-forming tools such as cold extrusion rams and dies, as well as  plastic moulds with elevated wear resistance and screws.