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M2 High speed steel flat bar

M2 High speed steel flat bar can be used for a variety of purposes: twist drills, taps, milling cutters, reamers, saw blades, broaches, roll-to-inserts, gear cutters and other gear cutters. In addition to cutting tools with red hardness requirements, they can also be used as cold work tool steels, such as die cutting, forming and embossing.

Production equipment

Product Basic Information:

Chemical Composition Table (%)

Item	C	Si	Mn	S	P	W	Mo	Cr	V
Min	0.80	0.20	0.15			5.50	4.50	3.80	1.75
Max	0.90	0.45	0.40	0.015	0.030	6.75	5.50	4.40	2.20

Mechanical Property

Temperature ℃	Density g/cm³	Modulus of elasticity KN/mm²	Coefficient of thermal expansion	Heat transfer coefficient W/m℃	Specific heat J/Kg℃
20	8.16	225		24	420
400	8.06	200	1.21 x 10-6	28	510
600	8.00	180	1.26 x 10-6	27	600

Physical Property

Tool Type	Tool Bits	Broach	Gear Cutting	Punch	Taps
Grain Size	9-10	10-11	10-11	10-11	10-11
Hardness	65-66HRC	64-65HRC	64-65HRC	64-65HRC	64-65HRC

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Heat Treatment of AISI M2 High Speed Material

· Anneal

Heat 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 Maximum Brinell.

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.

· Harden

Heat slowly to 1550° F, soak thoroughly, heat to 1850° F, soak thoroughly. Soak time in the furnace varies from a few minutes to 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 resistance.

· Quench

For full 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

Double 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.

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FAQ

Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.

If you have another question, please feel free to contact us as bellow:

Our Service

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We offer great strength in quality and development, merchandising, sales and marketing and operation for SAE 1020 / S235jr / Ss400 /St37-2 Peeled Bright Round Steel Bar. Our service tenet is to provide customers with the best cost-effective products and good services, and to maintain good cooperation with customers. Our company has a complete and scientific quality management system, and has been widely recognized by the industry for the integrity, strength and product quality.