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BS 4659 BM2 High-Speed Tool Steel

High-Speed Tool Steel BM2 main features and application

BS 4659 BM2 is kind of High-Speed Tool Steel.BM2 is a department of tungsten and molybdenum commonly used high-speed tool steel, carbide fine and uniform, high toughness, good thermoplastic, it can be thermoplastic forming. However, due to the easy oxidation and decarbonization, heating should be noted that protection.
BM2 used in the manufacture of a variety of cutting tools, such as turning tools, planer, milling cutters, broaches, reamers, drill bits, saw blades, shaper cutters, die.
2, The equal material of BS 4659 BM2 in different standard.

GB/T 9943 / ISO 4957 / ASTM A600 / JIS G4403 / BS 4659 / NF A35-590 / DIN 17350
W6Mo5Cr4V2 / HS6-5-2(S4) / T11302 / SKH51 / BM2 / S6-5-2 / HS6-5-2

BS 4659 BM2 chemical composition

C / Si / Mn / Cr / V / W / Mo / Cu / S / P
≤
0.80-0.90 / 0.20-0.45 / 0.15-0.40 / 3.80-4.40 / 1.75-2.20 / 5.50-6.75 / 4.50-5.50 / 0.25 / 0.030

BS 4659 BM2 mechanical property and delivery condition

Product Type / Standard / Delivery condition / Hardness
HBW / HRC
Hot rolled round bar/square bar / ASTM A600
GB/T 9943
ISO 4957
JIS G4403
BS 4659
NF A35-590
DIN 17350 / Annealing / ≤255 / ≤262 / ≥ 63
Hot forging round bar/square bar
Hot rolled/forging flat bar
Cold processed steel bar / Annealing+peeled
Peeled steel bar / Annealing +polishing
Bright steel
Heavyinsection(120mm-250mm) forging steel bar / Annealing
Hot rolled steel plate
Cold rolled steel plate
Cold rolled steel belt / Annealing +polishing / 207-255
Steel wire
Rm800MPa-1000MPa

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