1.2740
2015-05-25 10:12:00 Origin： Remark：0 Click：
EN ISO 4957 Specifications Tool Steel 1.2740 Round bar, Flat bar, Plate, Shaft, Stock Available, ESR steelmaking, Heat treatment, Cold working.
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
MATERIAL DATA SHEET - W-Nr 1.2740
MATERIAL CATEGORY: Hot working tool steel
MATERIAL SPECIFICATIONS: EN ISO 4957: 2000 , DIN 17350 (1980)
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.24 ~ 0.32
Silicon, Si (％): 0.30 ~ 0.50
Manganese, Mn (％): 0.20 ~ 0.40
Phosphorus, P (％) ≤: 0.030
Sulfur, S (％) ≤: 0.030
Chromium, Cr (％): 0.60 ~ 0.90
Molybdenum, Mo (％): 0.50 ~ 0.70
Vanadium, V (％): 0.25 ~ 0.32
Silicon, Si (％): 0.30 ~ 0.50
Manganese, Mn (％): 0.20 ~ 0.40
Phosphorus, P (％) ≤: 0.030
Sulfur, S (％) ≤: 0.030
Chromium, Cr (％): 0.60 ~ 0.90
Molybdenum, Mo (％): 0.50 ~ 0.70
Vanadium, V (％): 0.25 ~ 0.32
Nickel, Ni (％): 2.30 ~ 2.60
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working tenperature ℃: 1050～850
Annealing temperature ℃: 670~700
Hardness after annealing ≤ HBW: 240
Quenching temperature ℃: 840~870
Cooling medium: Oil or Air
Common tempering temperature ℃: 300~600
Hardening value after tempering at temperature /MPa |400℃: 1770
Hardening value after tempering at temperature MPa |500℃: 1620
Hardening value after tempering at temperature MPa |600℃: 1470
Hardening value after tempering at temperature MPa |650℃: -
Hot working tenperature ℃: 1050～850
Annealing temperature ℃: 670~700
Hardness after annealing ≤ HBW: 240
Quenching temperature ℃: 840~870
Cooling medium: Oil or Air
Common tempering temperature ℃: 300~600
Hardening value after tempering at temperature /MPa |400℃: 1770
Hardening value after tempering at temperature MPa |500℃: 1620
Hardening value after tempering at temperature MPa |600℃: 1470
Hardening value after tempering at temperature MPa |650℃: -
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 and external refining.
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 and external 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.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers. Email: sales@ccsteels.com.
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers. Email: sales@ccsteels.com.
PROFILE & DIMENSIONS
Round bar / Disc (diameter1): 5.5mm to 950mm
Square bar / Flat bar: 8mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Round bar / Disc (diameter1): 5.5mm to 950mm
Square bar / Flat bar: 8mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy / middle plate via hot rolled: T60 - 400mm X W80 - 1200mm X L1000-12000mm
Sheet steel via cold rolled: T0.5 - 4mm X W60 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts, and other different shapes based on OEM.
Sheet steel via cold rolled: T0.5 - 4mm X W60 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts, and other different shapes based on OEM.
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