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Hi - Speed, high Speed Steel Tool Steel (made) : highly processed into the Tool Steel, carbon content high, while containing cr quantity is low (about 4%), reason burnish of Steel surface gloss darker, after heat can reach by HRc62 high hardness, resistance to rust performance not on a roll.
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Alloy steel is steel alloyed with a variety of elements in total amounts of between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low alloy steels and high alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0 %.[1][2] Most commonly, the phrase "alloy steel" refers to "low alloy" steels.
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Home » Tool Steel » Product introduction
BS4659 BM42 high speed steel
- Numbers: 2011030814
- Model: BS4659 BM42
- Producers: China
- Update time: 2011.03.08
- Browse:
Product Description:
High Speed Steel
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BS4659 BM42 is a cobalt high speed steel which achieves a high hardness with excellent cutting performance and good toughness. After heat treatment M42 has excellent wear resistance, M42 will achieve a high heat treated hardness of 68 to 70 Rockwell C.
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TYPICAL ANALYSIS |
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C.
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Si.
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W.
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Cr.
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V.
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Mo.
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Co.
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1.05%
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0.35%
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1.50%
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3.75%
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1..15%
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9.50.%
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8.00%
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Annealed at 770 to 850°C. Soak thoroughly at this temperature and control furnace cool.
Hardening:
For best results harden M42 in a vacuum or atmosphere furnace, or in a properly rectified salt bath. Pre heat throughly to 820 to 870°C, transfer to the high temperature salt bath or furnace. The exact hardening temperature to use will depend on the type of work being treated, but in general M42 components should be hardened from the range of 1160 to 1180°C in salt, or 1180 to 1190°C in atmosphere or vacuum furnaces. After a short hold at the hardening temperature, quench the M42 component without further soaking into salt at 540 to 595°C or warm oil. If salt quenched allow the M42 component to equalise at the bath temperature and then complete the quench in still air. The maximum temperature of the M42 component before tempering shoud be 65°C. Larger components should not be allowed to remain at room temperature without tempering.
Tempering:
M42 components can be tempered between 510 to 595°C. For M42 high speed steel components a minimum tempering temperature of 540°C is recommended to provide suitable relief to the hardening stresses. Triple tempering is recommended with a minimum of two hours at temperature per cycle. The M42 components should be cooled in still air to room temperature between tempering treatments.
| Tempering °C |
500 |
550
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600
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HRc
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70
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67
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63
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Special Steel classification：
Stainless steel，Hi-Steel HSLA-80， Steel mould, Heat resistant steel, Tool steel, Ball bearing steel, Spring steel,Alloy steel, Construction steel， Die steel， Mould steel.
Product description：
Step Shaft BS4659 BM42 Tube BS4659 BM42 Pie-shaped BS4659 BM42 Ring BS4659 BM42 Module BS4659 BM42 Large valves of the main BS4659 BM42 Other Profiled forgings
Products Introduction :
Specialized and high quality steel.
We have the advantages of equipment, technologies and price.
Specifications
Round bar ：
Diameter : 1mm-2000mm
Square bar:
Size： 50mm * 50mm-600mm *600mm
Plate steel/flat bar:
Size：Thickness:0.1mm-800mm Width:10mm to 1500mm
Tube/pipe:
Size：OD:6-219mm WT：1-35 mm.
Cold-rolled sheet:Thickness:2-5mm Width:1000mm Length:2000mm
Hot-rolled sheet:Thickness:6-80mm Width:210-610mm
Length: We can supply any length based on the customer's requirement.
Forging/hot rolling/ extrusion of steel.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirement
Excellent service for all kinds of industries,with advantages of technologies, equipment and price.
We serve you with our honesty, integrity, and professionality.
