T1 Tool Stee / High Speed ​​/ 1.3355 / HS18-0-1 / SKH2

AISI/ASTM T1 tool steel is one of the original tungsten high speed steels, although all tungsten steel grades are used to a limited extent because of the cost and questionable availability of tungsten. Of the T group steels, the general purpose T1 tool steels and the high-vanadium-cobalt T15 are most commonly used.

T1 high speed steel is an air or oil hardening tool steel which has good comprehensive performance. HSS T1 tool steel has a high hardness (HRC62~66), strength, toughness and heat resistance, which is an excellent cutting tool material. T-1 tool steel grade is on the whole used for turning, planning & slotting instruments, tapes, twist drill, threading dies, profile slicing instruments, broaching instruments & reamers.

Generally, high speed steels are divided into three groups:

• Those bearing the symbol T where tungsten is the major alloying element;
• Those bearing the symbol M indicating that molybdenum are the principal alloying element;
• A group of more highly alloyed steels that is capable of attaining unusually high hardness values.

Here we have tool steel type T-1 with the chemical composition, physical, mechanical and thermal properties and other equivalents of T1 tool steels. Except T1 hss tool steel, we are also able to supply T2, T10, T-15 high speed steel etc.

1.High Speed T1 Tool Steel Supply Range

T1 Steel Round Bar: diameter 2mm – 200mm

T1 Steel Flat: spessore 2-20mm x larghezza 10-100mm

T1 Steel Plate: spessore 2-200mm x larghezza 200-610mm

Finitura superficiale: nera, lavorata ruvida, tornita o secondo i requisiti specifici.

2.Relevant Steel Specification of AISI T1 High Speed Tool Steels

Nazione	USA	Tedesco	Giappone
Standard	ASTM A600	ISO 4957	JIS G4403
classi	T1	HS18-0-1/1.3355	SKH2

3.AISI T1 Tool Steel and Equivalents’ Chemical Composition Properties

ASTM A600	C		Mn		P	S	Si		Cr		V		Mo		W		Co
T1	0.62	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	...	...
ISO 4957	C		Mn		P	S	Si		Cr		V		Mo		W		Co
HS18-0-1/1.3355	0.73	0.85	...	...	...	...	...	0.65	3.60	4.50	1.00	1.20	...	...	17.20	18.70	...	...
JIS G4403	C		Mn		P	S	Si		Cr		V		Mo		W		Co
SKH2	0.73	0.83	...	0.40	0.03	0.03	...	0.45	3.80	4.50	1.00	1.20	...	...	17.20	18.70	...	...

4. Proprietà meccaniche dell'acciaio per utensili T1 ad alta velocità

• Physical Properties of HSS T-1 Steels

Proprietà	metrico	Imperial
Densità	8.67 g / cm3	0.313 lb / in3

• Proprietà meccaniche dell'acciaio T-1

Proprietà	metrico	Imperial
Hardness, Rockwell C	63.0 - 65.0	63.0 - 65.0
rapporto di Poisson	0.27-0.30	0.27-0.30
Modulo elastico	190-210 GPa	27557-30457 ksi

• Proprietà termiche dell'acciaio per utensili T1

Proprietà		Condizioni
		T (°C)	Trattamento
Thermal expansion	9.7 x 10-6/ºC	20-200 more	-
Conduttività termica	19.9 x W/m-K	Più 100	-

5.Forging of AISI HSS T1 Tool Steel

1. Preheat T1 high speed steel uniformly and slowly to 850-880°C.
2. Increase the forging temperature for T-1 tool steel until 1050-1130°C.
3. L'acciaio per utensili T1 hss deve essere raffreddato molto lentamente dopo la forgiatura.

6.AISI / ASTM T1 Trattamento termico dell'acciaio per utensili e proprietà

Trattamento	Intervallo di temperatura	Cooling/Quenching	Note
Forgiatura	1700-2100° F	Lento.	Cool slowly in dry sand or in other insulating media.
ricottura	1600-1650° F	Cool slowly at a rate of 35° F per hour to 1000° F.	For best results, insulating media is desirable. Hold at temperature for 2 hours.
Alleviare lo stress	1100-1300° F	Cool slowly	Stress relieve after rough machining
Preheating	1500-1550° F		Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible.
Hardening	2325-2375° F (furnace)	Quench in air or warm oil. To minimize quenching strains, quench in salt at 1000° F	For maximum wear resistance, harden at 2375° F. For maximum toughness and high hardness, harden at 2275° F.
	2275-2350° F (salt bath)
tempra	1022 ° F-1058 ° F	Temper T1 high-speed steel immediately after quenching. Hold for at least two hours	Double tempering is recommended. The usual tempering time is 2+2 hours. Recommended temperature is 1000-1075° F for cutting tools. 1100-1200° F for shock tools

7.Applicazioni di acciaio per utensili ASTM / AISI T1

Generally, high speed steels are used for machining at high speeds. HSS T1 steel materials are widely used for:

• brocce
• Trapani
• Piani di cottura
• Knurling Tools
• Lathe Tools
• Milling Cutters
• Nut Piercers
• Planer Tools
• alesatori
• Shaving Tools
• rubinetti
• Thread Cutting Tools

We are capable of supply top quality T1 tool steel high speed also in good price, you could send us enquiries of T1 steel and request the latest offer. And leave a comment if there are any queries.