Wholesale Distributors for M2 Tool Steel | 1.3343 | HS-6-5-2C| SKH51 Factory in Cape Town
AISI M2 Tool Steel is molybdenum based high-speed steel in tungsten–molybdenum series. HSS grade steel M2 is a medium alloyed high speed steel which has good machinability. The H-SS M2 chemical composition gives a good combination of well-balanced toughness, wear resistance and red hardness properties. Widely used for cutting tools such as twist drills, taps, milling cutters, saws, knives etc. Also commonly used in cold work punches and dies and cutting applications involving high speed...
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is a medium alloyed high speed steel which has good machinability. The
H-SS M2 chemical composition gives a good combination of well-balanced
toughness, wear resistance and red hardness properties. Widely used for
cutting tools such as twist drills, taps, milling cutters, saws, knives
etc. Also commonly used in cold work punches and dies and cutting
applications involving high speed and light cuts.
Grade M2 High Speed Steel is by far the most popular high speed steel replacing high speed steel gradein most applications because of its superior properties and relative economy.
1. Common M2 Tool Steel Related Specifications and Equivalents
2. ASTM M2 Tool Steel Chemical Composition Properties
|M2 regular C||0.78||0.88||0.15||0.40||0.03||0.03||0.20||0.45||3.75||4.50||1.75||2.20||4.50||5.50||5.50||6.75|
|DIN ISO 4957||C||Mn||P||S||Si||Cr||V||Mo||W|
3. AISI HSS M2 Tool Steel Mechanical Properties
Physical Properties of HSS M2 Material
|Density||0.294 lb/in3 (8138 kg/m3)|
|Modulus of Elasticity||0.294 lb/in3 (8138 kg/m3)|
|Thermal conductivity||24 Btu/ft/hr/°F 41.5 W/m/°K|
|Machinability||65% of a 1% carbon steel|
AISI M2 Tool Steels Properties Mechanical
|Hardness, Rockwell C (tempered at 1150°F, quenched at 2200°F)||62||62|
|Hardness, Rockwell C (as hardened, quenched at 2200°F)||65||65|
|Compressive yield strength (when tempered at 300°F)||3250 MPa||471000 psi|
|Izod impact unnotched (when tempered at 300°F)||67 J||49.4 ft-lb|
|Abrasion (loss in mm3, as-hardened; ASTM G65)||25.8||25.8|
|Abrasion (loss in mm3, tempered at 1275°F; ASTM G65)||77.7||77.7|
|Elastic modulus||190-210 GPa||27557-30458 ksi|
M2 Steels Thermal Properties
|CTE, linear (@20.0 – 100°C/ 68.0 – 212°F)||10 μm/m°C||5.56 μin/in°F|
|CTE, linear (@20.0 – 500°C/68.0 – 932°F)||12.2 μm/m°C||6.78 μin/in°F|
|CTE, linear (@20.0 – 850°C/68.0 – 1560°F)||12.6 μm/m°C||7 μin/in°F|
4. Forging of AISI M2 High Speed Steel
heat M2 HSS steel slowly and uniformly to 850-900°C. The heat should
then be increased more quickly to the forging temperature of
1050-1150°C. If during the forging
the temperature of the M2 high speed tool steel material drops below
880-900°C, re-heating will be necessary. Cool the M2 steel component
very slowly after forging.
5. Heat Treatment of M2 Steel HSS
to 1600° F, soak thoroughly at heat. Furnace cool 25° F per hour to
900° F, air cool to room temperature. Approximate annealed hardness 241
Stress Relief of Unhardened Material: Heat slowly
to 1200 to 1250° F. Soak for two hours per inch of thickness at heat.
Slow cool (furnace cool if possible) to room temperature.
Preheat: Heat slowly to 1550° F, soak thoroughly, heat to 1850° F, soak thoroughly.
time in the furnace varies from a few minutes to a 15 minutes,
depending tool size, heat capacity of the furnace, and the size of the
charge. – Heat to 2150 to 2200° F for max. toughness and minimum
distortion. – Heat to 2250 to 2275° F for max. hardness and abrasion
hardness, oil quench to 150-200° F. Air quench to 150° F. When quenching
in hot salt maintain the quench just above the Ms temperature. After
equalizing withdraw parts from the hot salt and air cooled to 150° F.
temper is mandatory, three tempers are sometimes preferred. Soak for 2
hours per inch of thickness. Air cool to room temperature between
tempers. The best tempering range for hardness, strength and toughness
is 1000 to 1050° F.
|Temper° F||Rockwell “C”||Temper° F||Rockwell “C”|
6. Machinability of AISI M2 Tool Steel H-SS
of HSS M2 tool steels can be carried out using grinding methods.
However, they have poor grinding capability and hence they are regarded
as “medium” machinability tool steel under annealed conditions. The
machinability of these tool steels M2 is only 50% of that of the easily
machinable W group or water hardening tool steels.
7. M2 Tool Steel Applications
The main use of high-speed steels continues to be in the manufacture of various cutting tools.
applications for M2 high speed steel are twist drills, reamers,
broaching tools, taps, milling tools, metal saws. M2 is suitable for
cold forming tools such as extrusion rams and dies, also widely used in
all kinds of cutting tools, knife and punches and die applications,
plastic moulds with elevated wear resistance and screws.
Forged bars-Sorel Forge
Forging is the process of shaping metal using extreme forces. The standard mode of classification of forged metals is by the heat at which they were manipulated: cold, warm or hot. Hot forging is normally performed at about 1200 degrees, warm forging at 650-700 degrees centigrade and cold forging at room temperature.
Forging dates back to the 12th century, when hammers and anvils were used to shape metals for various purposes. Nowadays, industrial presses or hammers are the main tools, powered by compressed air, electricity, steam or hydraulics. Forging has the ability to create bars that are better than those machined or from cast steel. During the forging process, the grain of the metal is shifted to follow the contours of the shape of the steel. This can lead to improved strength characteristics and reduced brittleness.
Sorel Forge produces forged bars sizes from 10 inches (255 mm) up to 36 inches (915 mm) in diameter in carbon and medium alloy steel grades.
There are many types of forged steel bars. Some of the most common types are Carbon and Alloy Steel Hot Forged Bars, Cold Rolled Bright Bars and Carbon and Alloy Steel Hot Rolled Round Bars. The grade of manufacture is dictated by the cost and the application of the bars. Common grades of steel used include but are not limited to; 1045, 1018, 1020, 1030, 1035, 1070, 4130, 4140, 4145, 4150, 4320, 4330, 4330, 4340, 8620, 8630, 9310, A182F22, A350LF2, H13, SS410 etc . (PER AISI, SAE, ASTM A688, ASTM A322 and ASTM A182 as example).
The quality of forged steel is described in terms of surface quality, internal quality, a uniform and fine austenitic grain size, good response to heat treatment, good toughness on impact and cleanliness. Normally, forged steel products require some finishing and the forging process is the first step in a two or more step process.
Forged steel parts vary in size from less than a kilogram to over 500 metric tonnes. Huge steel bars are used a great deal in the oil and energy exploration sector where they need to be resistant to extreme forces.
Other applications of forged steel bars are for steel plants, dam gates and crane manufacture, cable machine manufacture, hydraulic press manufacture, shafts and axles for drives in diverse industries, and the car manufacture industry. In many sectors, steel bars have become indispensable to standard operational processes.
Sorel Forge adheres to strict quality control processes and we carry out a battery of regular tests on all our forged steel bars.
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