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1.2888
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Specifications 1.2888 Suppliers, Datasheet 1.2888 Chemical, Inventory 1.2888 Properties from steelmaking, Hot forging, rolling, heat treat, cold working. We also possess advanced precision machining equipments for further processing. Technical Standards - EN ISO 4957: 2000 , DIN 17350 (1980) or By agreement.
MATERIAL DATASHEET - Grade DIN 1.2888
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS BV
MATERIAL CATEGORY - Hot working tool steel
MATERIAL SPECIFICATIONS - EN ISO 4957: 2000 , DIN 17350 (1980)
CHEMICAL COMPOSITION (WEIGHT - %)
C (%):     0.17 ~ 0.23
Si (%):     0.15 ~ 0.35
Mn (%):   0.40 ~ 0.60
P (%)≤:   0.035
S (%)≤:   0.035
Cr (%):    9.00 ~ 10.00
Mo (%):   1.80 ~ 2.20
V (%):     -
Co (%):   9.50 ~ 10.5
W (%):    5.00 ~ 6.00
HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working tenperature ℃: 1050~900
Annealing temperature ℃: 720~850
Hardness after annealing ≤HBW: 320
Quenching temperature ℃: 1100~1150
Cooling medium: Oil or air
Common tempering temperature ℃: 600~750
Hardening value after tempering at temperature /MPa |400℃:   -
Hardening value after tempering at temperature  MPa |500℃: HRC55
Hardening value after tempering at temperature  MPa |600℃: HRC54
Hardening value after tempering at temperature  MPa |650℃: HRC53
MELTING PROCESS 
This alloy is generally smelt in electric arc furnace  (EAF ) or AOD + 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
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.
PROFILE & DIMENSIONS
Round bar / Wire rod (Diameter1): 5.5mm to 450mm
Square bar / Flat bar: 10mm to 500mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T10 - 350mm X W40 ~ 500mm X L1000 ~ 3000mm
Sheet steel via cold rolled: T1.5 - 4mm X W100 ~ 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.5 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers, E-mail us:
sales@ccsteels.com

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