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SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel

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SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel

SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel
SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel

Large Image :  SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel

Product Details:
Place of Origin: CHINA
Brand Name: takford
Model Number: M2/1.3343/SKH51
Payment & Shipping Terms:
Minimum Order Quantity: 1 pc
Price: usd 8-15/kg
Packaging Details: SEA SAFETY PACKAGE
Delivery Time: 10-20 DAYS
Payment Terms: L/C, D/P, T/T
Supply Ability: 100 tons per month

SKH51 Quenched 65HRC Flat Bar High Speed Tool Steel

Type: Alloy Steel Bar, Carbon Steel Bar, Tool Steel, Mold Steel, Ally Steel Bar/Sheet Steel Grade: M2/1.3343/SKH51
Application: Blade And Mold Surface Treatment: Black Or Machined, Black Bright Mirror(mill Polishing HL Etc), Black Surface Or Mi
Tolerance: K11 Or H9, H9&h11, 0/+1.0mm(turned) -0/+5.0mm(black) Standard: DIN, ASTM, AISI, GB, JIS
Hardness: Annealing Or 50-65 HRC
High Light:

65HRC SKH51 Tool Steel Flat Bar


65HRC High Speed Tool Steel


SKH51 65HRC Tool Steel Flat Bar

SKH51 High Speed Steel flat bar Quenched and tempered in 65HRC


AISI M2 high speed tool steel manufacturers and suppliers, supplied in round bar,square bar,flat bar,plate,sheet and wire.M2 is a molybdenum high speed steel,as a standard, it is most widely used industrial HSS.It has small and evenly distributed carbides giving high wear resistance, though its decarburization sensitivity is a little bit high.M2 has superior properties in toughness, wear resistance ,hardness and good machinability. Compared with T1, it is more economic ,its hardness is same as T1 after heat treatment,but its bending strength can reach 4700 MPa, and its toughness and thermo-plasticity are higher than T1 by 50%.



1.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

2.Chemical Composition

Standard Grade C Mn P S Si Cr V Mo W
ASTM A600 M2 0.78-0.88 0.15-0.4 0.03 0.03 0.2-0.40 3.75-4.50 1.75-2.2 4.5-5.5 5.5-6.75
DIN EN ISO 4957 1.3343 0.86-0.94 0.40 0.03 0.03 0.45 3.80-4.50 1.70-2.0 4.7-5.2 6.0-6.70
JIS G4403 SKH51 0.80-0.88 0.40 0.03 0.03 0.45 3.80-4.50 1.70-2.1 4.5-5.5 5.9-6.70
GB/T 9943 W6Mo5Cr4V2 0.80-0.90 0.15-0.4 0.03 0.03 0.2-0.45 3.80-4.40 1.75-2.2 4.5-5.5 5.5-6.75

3.Physical Property

Density,g/cm3 8.1
Melting point,°C 1430
Modulus of elasticity,N/mm2 217 x 10^3
Thermal conductivity,W/m °C 19
Specific heat,J/kg °C 460
Electrical Resistivity,ohm*mm2/m 0.54
Machinability 50-60% of a 1% carbon steel

4.Thermal Expansion

10^-6 m/(m*K)

10^-6 in/in °F
°F °C
212 100 11.5 6.5
392 200 11.7 6.6
572 300 12.2 6.9
752 400 12.4 7
932 500 12.7 7.1
1112 600 13 7.3
1292 700 12.9 7.3

5. Mechanical Property

Hardness, Rockwell C (tempered at 620°C, quenched at 1200°C) 62
Hardness, Rockwell C (as hardened, quenched at 1200°C) 65
Compressive yield strength (when tempered at 150°C) 3250 MPa
Izod impact unnotched (when tempered at 150°C) 67 J
Abrasion (loss in mm 3 , as-hardened; ASTM G65) 25.8
Abrasion (loss in mm 3 , tempered at 690°C; ASTM G65) 77.7
Poisson's ratio 0.27-0.30
Elastic modulus 190-210 GPa


Pre heat the AISI M2 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 850°C. Slow cooling in furnace after forging.


Annealing must be performed after hot working and before re-hardening.Heat the temperature to 770 to 840°C with a rate not exceeding 220°C per hour.Controlled slow cooling in furnace at 10 to 20°C per hour to approximately 600°C, followed by cooling in still air. Hardness after annealing 269 Brinell, maximum.

8.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 650°C, and soak for approximately two hours,followed by slow cooling in the furnace.


Preheat in multiple steps and equalize surface and core temperatures,first step with 550°C,second step with 850°C,third step with 1050°C,then to the appropriate hardening temperature 1190 to 1230°C.

Quench in: oil, salt bath at 500 to 550°C, or vacuum. The upper temperature range should be used for parts of simple geometry, the lower range for more complex tooling. For cold work tooling, lower temperatures are of importance for improved toughness.


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).First and second tempers is required to reach the desired hardness level, and the third selected for additional stress relief at 30 to 50°C below the highest tempering temperature. Intermittent cooling, in air, between tempers is required for a minimum of 1 hour. Obtainable hardness of 64 to 66 HRC.

  Hardening Temperature,°F
Double Tempering Temperature,°F 2150 2200 2225
800 61HRC 61.5HRC 62HRC
850 61.5HRC 62HRC 62.5HRC
900 62.5HRC 63HRC 63.5HRC
950 63HRC 64HRC 65HRC
1000 64HRC 65HRC 65.5HRC
1025 63.5HRC 65HRC 65.5HRC
1050 63HRC 64.5HRC 65HRC
1100 61.5HRC 62.5HRC 63.5HRC
1150 57.5HRC 59HRC 60HRC
1200 51HRC 54HRC 55HRC


AISI M2 is used in a wide used for all kinds of cutting tool, cold forming tools,punch and die applications.

Typical use include:twist drills, reamers, broaching tools, taps, milling tools, metal saws,knife,and etc.


Contact Details

Contact Person: Merain Pan

Tel: +8613537200896

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