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MATERIAL CATEGORY - high speed tool steel
MATERIAL SPECIFICATIONS - DIN EN ISO 4957 - 2001
OFFICIAL TEST REPORT: issued by TUV - SGS - BV
CHEMICAL COMPOSITIONS ( Mass weight - % )
C (％): 1.15 ~ 1.25
Si (％): ≤ 0.45
Mn (％): ≤ 0.40
P (％)≤: 0.030
S (％)≤: 0.030
Cr (％): 3.80 ~ 4.50
Mo (％): 4.70 ~ 5.20
W (％): 6.00 ~ 6.70
V (％): 2.70 ~ 3.20
Co (％): -
HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working temperature: 1100 ~ 900
Annealing temperature: 770 ~ 820
Annealed hardness, HBW: 240 ~ 300
Quenching temperature /℃, cooling medium = oil / 550℃ heating bath, air cooling
Heating temperature /℃: 450 ~ 650
First time preheat temperature /℃: 850
Second time preheat temperature /℃: 1050
Last time preheat temperature /℃: 1200 ~ 1240
Tempering temperature /℃: 550 ~ 570
Hardness after tempering ≥HRC: 65
High speed steel is generally widely used in the field of machining at high speeds. With the excellent abrasion resistance, high temperature properties and excellent hardness, high speed steels (HSS) have become material a wide range of applications including cutting tools, such as drills, taps, milling cutters, tool bits, gear cutters, saw blades and rolls, such as hot strip mill finishing train, rod and bar mill finishing, universal mill finishing. High speed steels also found a market in fine hand tools where their relatively fine toughness at high hardness, coupled with high abrasion resistance, made them suitable for low speed applications requiring a durable edge, such as chisels, hand plane, blades, and high quality kitchen hardware, pocket knives, swords.
This alloy is generally smelt in electric arc furnace (EAF ), EF or IFF + VD, LF + Electroslag remelting (ESR). For a purpose of superior quality, it should be smelt via technology of vacuum refining or by agreement.
PRODUCT PROFILE AND AVAILABLE FORMS
Round bar (Diameter): 5.5 mm to 500mm
Square bar / Flat bar: 3 mm to 500mm
Wire rod (Diameter): 5.5 ~ 15mm
Length: random length, fixed length or based on the customer's special requirement.
Steel strip: T0.10 ~ 3mm X W10 ~ 1200mm X Coil
Heavy/middle plate via hot rolled: T4 - 200mm X W1000- 1500mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
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