T20823 datasheet,T20823 chemical,T20823 heat treatment
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T20823
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Specifications T20823 datasheet, T20823 Chemical, T20823 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.
Official Test Certification: issued by TUV - SGSBV

TECHNICAL SPECIFICATION MATERIAL DATASHEET - UNS T20823
MATERIAL CATEGORY - Hot work tool steel
MATERIAL SPECIFICATIONS - ASTM A681 -2004
CHEMICAL COMPOSITION (WEIGHT - %)
C (%):     0.25 ~ 0.35
Si (%):     0.15 ~ 0.60
Mn (%):   0.15 ~ 0.40
P (%)≤:   0.030
S (%)≤:   0.030
Cr (%):    11.0 ~ 12.75
Mo (%):   -
W (%):    11.0 ~ 12.75
V (%):     0.75 ~ 1.25
HEAT TREATMENT PRACTICE AND HARDNESS
Hot working tenperature ℃ /Starting: 1070~1180
Hot working tenperature ℃ /Ending: 900
Annealing temperature ℃: 870~900
Hardness after annealing ≤HBW: 213~255
Quenching temperature ℃: 1200~1270
Cooling medium: air/oil
Tempering temperature ℃: 650~810
Hardness value after tempered /HRC: 47~30

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
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.
AVAILABLE FORMS & DIMENSIONS
Round bar / Wire rod (Diameter): 5.5mm to 500mm
Square bar / Flat bar: 3mm 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
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 engineer, Email:
sales@ccsteels.com.

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