Acciaio per utensili ad alta velocità M35 / 1.3243 / HS6-5-2-5 / SKH55

ASTM A600 M35 steel is a medium-alloyed high speed tool steel. It is also known as HSSE or HSS-E which is similar to M2, but with 5% cobalt added, which makes better hot hardness and wear resistance. AISI /ASTM A600 M35 high speed steel is suitable for heat treatment up to 66 HRC, and also offers excellent cutting performance and offers excellent cutting performance. AISI high speed Tool Steel M35 is suitable for broaches, taps, milling, reamers, hobs, shapers cutters, saws ,etc.

HSS M35 is a conventionally manufactured cobalt alloyed high-speed steel. The various stages of the manufacturing process are chosen and controlled so that an end product is obtained with a good
structure in terms of carbide size and distribution. this is a distinct advantage for the finished tool.

High-Speed Steel M35 tool steel is characterised by

• all-round applicability
• good machine-ability
• buona performance
• good hot hardness

1. Supply Range of AISI High-Speed Steel Tool Steel M35

M35 Steel Round Bar: diameter 2mm – 300mm

M35 Flat Bar: thickness 2-20mm x width 10-100mm

M35 Steel Plate: thickness 2-200mm x width 200-610mm

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

2. Relevant Steel Specification of AISI Tool Steel M35 High Speed

Nazione	USA	Tedesco	Giappone
Standard	ASTM A600	ISO 4957	JIS G4403
classi	M35	1.3243/HS6-5-2-5	SKH55

3. AISI HSS Tool Steel M35 material Chemical Composition Compparison

ASTM A600	C		Mn		P	S	Si		Cr		V		Mo		W		Co
M35	0.82	0.95	0.15	0.40	0.03	0.03	0.20	0.45	3.80	4.50	1.75	2.15	4.75	5.25	5.50	6.50	4.60	5.00
ISO 4957	C		Mn		P	S	Si		Cr		V		Mo		W		Co
1.3243/HS6-5-2-5	0.87	0.95	...	0.40	0.03	0.03	...	0.45	3.80	4.50	1.70	2.10	4.70	5.20	5.90	6.70	4.50	5.00
JIS G4403	C		Mn		P	S	Si		Cr		V		Mo		W		Co
SKH55	0.87	0.95	...	0.40	0.03	0.03	...	0.45	3.80	4.50	1.70	2.10	4.70	5.20	5.90	6.70	4.50	5.00

4.Mechanical Properties of ASTM HSS Tool Steel M35

• M35 HSS Physical Properties

		Temperature °C / °F
		20 / 70		400 / 750		600 / 1110
Densità	Kg / m & sup3; lbs/in³	8150 . 294		8050 . 290		7990 . 228
Modulo di elasticità	kN/mm³² psi	230 34 · 10 6		205 31 · 10 6		184 27 · 10 6
Coefficient of Thermanl expansion from 20°C / 70°F	per °C per °F	-		11.6 · 10-6 6.4 · 10-6		11.9 · 10-6 6.6 · 10-6
Conduttività termica	W/m °C Btu/sq. ft. h °F/in.	24 166		28 194		27 187
Calore specifico	J/kg °C Btu/lb °F	420 0.10		510 0.12		600 0.14

• H-SS Steel M35 Mechanical Properties

Proprietà meccaniche	metrico	Imperial
Hardness, Rockwell C (oil quenched from 1232°C, 5 mins)	64.8	64.8
Hardness, Rockwell C (oil quenched from 1177°C, 5 mins)	65.2	65.2
Hardness, Rockwell C (oil quenched from 1204°C, 5 mins)	65.2	65.2
Modulo di elasticità	207 GPa	30000 ksi
Machinability (1% carbon steel)	45.0 - 50.0%	45.0 - 50.0%

• M35 Steel Thermal Properties

Thermal properties	metrico	Imperial
CTE, linear (@21 – 399°C / 69.8 – 750°F)	11.4 μm/m°C	6.33 μin/in°F
CTE, linear (@21 – 593°C /69.8 – 1100°F)	11.5 μm/m°C	6.39 μin/in°F

5. Forging of ASTM A600 High Speed Tool Steel M35

Pre heat the AISI M35 high speed steel slowly and uniformly to 450-500°C and equalise. Then increase M35 tool steel more quickly to the forging temperature of 950-1100°C and equalise prior to forging. Do not allow the forging temperature to drop below 950°C, if this occurs re heating will be necessary. Always cool the steel very slowly after forging.

6. Machinability of AISI M35 Tool Steel

High Speed tool steel M35 can be worked in the same way as other high-speed steels by plastic forming, machining, grinding, electrical discharge machining, welding and polishing. M35 tool steel is amenable to cold forming. In grinding, local heating of the surface, which might alter the temper, must be avoided. Grinding wheel makers can furnish advice on the choice of grinding wheels. Machining is carried out using carbide or high-speed steel tools.

7. Heat Treatment of AISI Tool Steel M35 High Speed Material

• Soft-annealing 850°C – 900°C / 1560°F – 1650°F, slow cooling 10°C / 18°F/h to 700°C / 1290°F, hardness max 260 Brinell.
• Stress relieving 600°C – 700°C / 1120°F – 1290°F, approx. 2 hours at temperature, slow cooling to 500°C / 930°F.
• Hardening with preheating in two steps 450°C – 500°C / 840°F – 930°F, 850°C – 900°C / 1560°F – 1650°F and austenitizing at 1050°C – 1220°C / 1920°F – 2230°F. Quenching to about 550°C / 1022°F then cool in air to hand warm
• Tempering at 560°C / 1040°F or higher 2 times for at least 1 hour at full temperature is recommended.

8. Application for AISI Tool Steel M35 High Speed Steel

AISI HSS M35 tool steel is usually used in conditions with the demand for high hardness. M35 steel is suitable for cutting tools such as cutting tools including broaches, milling cutters, reamers, end mills and saw blades. It is also a good quality wear resistant HSS grade for cold work area. Steel M35 is also suitable for cold work applications, where exacting demands are imposed on wear resistance. The steel possesses an admirable combination of wear resistance and toughness and in these respects superior to the high alloyed cold work steels.

We are M35 tool steel high speed supplier with decades history. We supply reliable M35 steel materials products as well as technical support of other High Speed Steel like M2, M42 steels. Contact us for any demand of high speed M35 steels.