SKD7
2016-01-18 12:01:19 Origin： Remark：0 Click：
JIS G4404 -2006 Specifications SKD7 Round bar, Flat bar, Forgings D7 Steelmaking, ESR melted, Blooming, Hot forging, Hot rolling, Heat treatment
Technical Specification Datasheet - Grade SKD7
OFFICIAL TEST REPORT - issued by TUV - SGS - BV
MATERIAL CATEGORY - Hot work alloy tool steel
MATERIAL SPECIFICATIONS - JIS G4404 -2006
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.28 ~ 0.35
Silicon, Si (％): 0.10 ~ 0.40
Manganese, Mn (％): 0.15 ~ 0.45
Phosphorus, P (％) ≤: 0.030
Sulfur, S (％) ≤: 0.030
Manganese, Mn (％): 0.15 ~ 0.45
Phosphorus, P (％) ≤: 0.030
Sulfur, S (％) ≤: 0.030
Chromium, Cr (%): 2.70 ~ 3.20
Tungsten, W (％): -
Vanadium, V (%): 0.40 ~ 0.70
Molybdenum, Mo (%): 2.50 ~ 3.00
HEAT TREATMENT PRACTICE AND HARDNESS
Hot working tenperature ℃ /Starting: 1100
Hot working tenperature ℃ /Starting: 1100
Hot working tenperature ℃ /Ending: 900
Annealing temperature ℃: 820~870
Hardness after annealing ≤HBW: 229
Quenching temperature ℃: 1040
Cooling medium: Air cooled
Annealing temperature ℃: 820~870
Hardness after annealing ≤HBW: 229
Quenching temperature ℃: 1040
Cooling medium: Air cooled
Tempering temperature ℃: 550
Hardness value after tempered /≥ HRC: 46
MELTING PROCESS
This alloy is generally smelt in electric arc furnace (EAF ) or IFF + VD, LF + Electroslag remelting (ESR). For a purpose of higher quality, it should be smelt via technology of vacuum refining.
Hardness value after tempered /≥ HRC: 46
MELTING PROCESS
This alloy is generally smelt in electric arc furnace (EAF ) or IFF + VD, LF + Electroslag remelting (ESR). For a purpose of higher quality, it should be smelt via technology of vacuum refining.
TYPICAL APPLICATIONS
Alloy tool steel is widely used to produce the cutting tool, cold/heat distortion mould and measuring implements,
and further to manufacture the piston, valve, valve seat of fuel pump of diesel engine.
Cutting tools, Mechanical parts, Air hammer tools, Piercing tools.
Alloy tool steel is widely used to produce the cutting tool, cold/heat distortion mould and measuring implements,
and further to manufacture the piston, valve, valve seat of fuel pump of diesel engine.
Cutting tools, Mechanical parts, Air hammer tools, Piercing tools.
HEAT TREATTMENT PRACTICE
The preheating of measuring and cutting tool steel is spheroidizing annealing, final heat treatment is quenching + low temperature tempering and hardness after heat treatment can reach 60~65HRC. When heat treat tool steel grades consideration should be given to hardening temperature, including ratio of heating, cooling and soaking times which will differ due to factors such as the shape and size of each chemical component. Other considerations during heat treatment include the type of furnace, quenching medium and work piece transfer facilities.
The preheating of measuring and cutting tool steel is spheroidizing annealing, final heat treatment is quenching + low temperature tempering and hardness after heat treatment can reach 60~65HRC. When heat treat tool steel grades consideration should be given to hardening temperature, including ratio of heating, cooling and soaking times which will differ due to factors such as the shape and size of each chemical component. Other considerations during heat treatment include the type of furnace, quenching medium and work piece transfer facilities.
FEATURES AND CLASSIFICATIONS
Hot-work die divides into several main types, such as hammer forging, die forging, extrusion and die casting, including hot forging die, press machine forging die, stamping die, hot-extrusion die, metal die-casting mould. Heat distortion mould not only supports huge mechanical stress, but also thermal stress during working repeatedly. Hot-work die steel should have not only high hardness, red hardness, abrasion resistance, toughness, but also have excellent high temperature strength, thermal fatigue stability, thermal conductivity, upper hardenability for guaranteeing the whole cross section with consistent mechanical property.
Hot-work die divides into several main types, such as hammer forging, die forging, extrusion and die casting, including hot forging die, press machine forging die, stamping die, hot-extrusion die, metal die-casting mould. Heat distortion mould not only supports huge mechanical stress, but also thermal stress during working repeatedly. Hot-work die steel should have not only high hardness, red hardness, abrasion resistance, toughness, but also have excellent high temperature strength, thermal fatigue stability, thermal conductivity, upper hardenability for guaranteeing the whole cross section with consistent mechanical property.
PRODUCT PROFILE & DIMENSIONS
Round bar / Disc (diameter): 5.5mm to 700mm
Square bar / Flat bar: 10mm to 600mm
Length: Fixed length or random length or based on the customer's special requirement.
Round bar / Disc (diameter): 5.5mm to 700mm
Square bar / Flat bar: 10mm to 600mm
Length: Fixed length or random length or based on the customer's special requirement.
Steel strip: T0.20 ~ 500mm X W10 ~ 1000mm X L
Heavy/middle plate via hot rolled: T6 - 300mm X W10 - 350mm X L1000-3000mm
Forging piece: stepped shafts, other different shapes based on OEM.
Heavy/middle plate via hot rolled: T6 - 300mm X W10 - 350mm X L1000-3000mm
Forging piece: stepped shafts, other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE & SERVICE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers, Email us: sales@ccsteels.com.
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers, Email us: sales@ccsteels.com.
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