H12 / T20812
2015-12-11 09:49:41 Origin： Remark：0 Click：
Technical specifications of hot working alloy tool steel H12 Round bar, T20812 plate, Forging block H12 Mechanical properties from Steelmaking, ESR melted.
Official Test Certification: issued by TUV - SGS - BV
TECHNICAL SPECIFICATION DATASHEET: Grade H12 & T20812
MATERIAL CATEGORY: Hot working tool steel
MATERIAL SPECIFICATIONS: ASTM A681 -2004
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.30 ~ 0.40
Silicon, Si (％): 0.80 ~ 1.20
Manganese, Mn (％): 0.20 ~ 0.40
Phosphorus, P (％)≤: 0.030
Sulfur, S (％)≤: 0.030
Chromium, Cr (％): 4.75 ~ 5.50
Molybdenum, Mo (％): 1.25 ~ 1.75
Tungsten, W (％): 1.00 ~ 1.75
Silicon, Si (％): 0.80 ~ 1.20
Manganese, Mn (％): 0.20 ~ 0.40
Phosphorus, P (％)≤: 0.030
Sulfur, S (％)≤: 0.030
Chromium, Cr (％): 4.75 ~ 5.50
Molybdenum, Mo (％): 1.25 ~ 1.75
Tungsten, W (％): 1.00 ~ 1.75
Vanadium, V (%): 0.10 ~ 0.50
HEAT TREATMENT PRACTICE AND HARDNESS
Hot working tenperature ℃ /Starting: 1070 ~ 1150
HEAT TREATMENT PRACTICE AND HARDNESS
Hot working tenperature ℃ /Starting: 1070 ~ 1150
Hot working tenperature ℃ /Ending: 900
Annealing temperature ℃: 840 ~ 900
Hardness after annealing ≤HBW: 192 ~ 229
Quenching temperature ℃: 990 ~ 1020
Cooling medium: air
Tempering temperature ℃: 540 ~ 650
Hardness value after tempered /HRC: 54 ~ 38
MELTING PROCESS
This alloy is generally smelt in electric arc furnace (EAF ) or IFF + VD, LF + Electroslag remelting (ESR).
Annealing temperature ℃: 840 ~ 900
Hardness after annealing ≤HBW: 192 ~ 229
Quenching temperature ℃: 990 ~ 1020
Cooling medium: air
Tempering temperature ℃: 540 ~ 650
Hardness value after tempered /HRC: 54 ~ 38
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): 5.50mm to 800mm
Square bar / Flat bar: 10mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts, other different shapes based on OEM.
Round bar / Disc (diameter): 5.50mm to 800mm
Square bar / Flat bar: 10mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 - 200mm X W1000- 2500mm X L1000-12000mm
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: 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.
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