40CMD8 datasheet,40CMD8 chemical,40CMD8 heat treatment
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40CMD8
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Specifications 40CMD8 datasheet, 40CMD8 Chemical, 40CMD8 Properties from Steelmelting (ESR refined), Blooming, Hot forging, Hot rolling, Heat treatment, Straightening, 100% Ultrasonic flaw detection test, Cold working or Machined. All of these materials conform to Military standard, nuclear power. 100% Ultrasonic test ASTM E2375 /SAE AMS 2154 /SEP 1923 /GB/T 4162 /EN 10228-3.
MATERIAL STANDARDS - NF 40CMD8

OFFICIAL TEST REPORT - issued by TUV - SGS -  BV
MATERIAL CATEGORY - Cold work alloy
tool steel
MATERIAL SPECIFICATIONS - NF A35-590 1992
CHEMICAL COMPOSITION (WEIGHT - %)
C (%):     0.35 ~ 0.45
Si (%):     0.15 ~ 0.40
Mn (%):   1.35 ~ 1.65
P (%)≤:   0.030
S (%)≤:   0.030
Cr (%):    1.75 ~ 2.15
Mo (%):   0.15 ~ 0.30
Ni (%):    -
V (%):     -
HEAT TREATMENT PRACTICE AND HARDNESS
Hardness after annealing ≤HBW: 300
Quenching temperature ℃:         -
Cooling medium:                       -
Tempering temperature ℃:         -
Hardness value after tempered /≥ HRC: -
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.
Cutlery for medical equipments
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.
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.
PRODUCT PROFILE AND AVAILABLE FORMS
Round bar (Diameter): 5.5mm to 500mm
Square bar / Flat bar: 3mm to 610mm
Length: random length, fixed length or based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 1000mm X Coil
Heavy/middle plate via hot rolled: T40 - 400mm X W60 - 1000mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /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.

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