Description

DIN 1.2360 DC53 Cold Worked steel bar
 
Features
UTOP33, originates from SUPER technology and is a type of hot work tool steel with high quality. Its main features includes high purity, homogeneous annealing structure, excellent impact property.
UTOP33 is applied for making hot extrusion die, hot forging die and large-sized plastic mould which has high demand on toughness, and also need polishing or dermatoglyph treatment.
UTOP33 is strictly inspected as per standard NADCA#207-2011, and other properties also can be tested as customers' requirement.

Equivalence

 

Chemical Composition (in weight %)

Description
Hot work tool steel. Secondary hardening steel with high strength and wear resistance in hot. Good tempering resistance. High hardenability and thoughness. Tools can be water cooled.

Applications
Wear resisting tools, pressure die casting tools, pressing tools for light and heavy metal. For the highest requirements we recommend UTOPMO7 ESR EFS. 

Physical properties (avarage values) at ambient temperature
Density [g/cm³]: 7.83
Thermal conductivity [W/m.K]: 25.0 

Thermal conductivity [W/m.K]

Coefficient of Linear Thermal Expansion 10^-6 oC^-1

Continuous Cooling Transformation (CCT) Diagram

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Time-Temperature Transformation (TTT) Diagram

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Soft Annealing
Heat to 800-840^oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 235.

Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to 650^oC, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.

Hardening
Harden from a temperature of 1030-1080^oC followed by air, oil or warm bath (500-550^oC) quenching. Hardness after quenching is 53-57 HRC.

Tempering
Tempering temperature: See the table bellow.

Tempering Temperature (^oC) vs. Hardness (HRC) vs. Tensile Stregth (N/mm²)

Tempering Diagram

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Diagram Tempering Temperature - Mechanical Properties

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Diagram Tempering Temperature - Mechanical Properties

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Diagram Tempering Temperature - Mechanical Properties

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Forging
Hot forming temperature: 1080-900^oC. 

Machinability
No data.

Forms manufactured: Please see the  Dimensional Sales Program. 

Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.

Delivery Condition
EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, EFS, Hardness≤235HB, Un-machined or
Machined surface (Peeled, Turned, Milled, Grinded), UT 100% Passed
 
Characteristics
Hot work tool steel featuring a fine combination of heat checking resistance, hot strength and impact strength; admits water cooling.
 
Applications
1. Highly stressed hot work tools, mainly for the processing of heavy alloys, such as mandrels, dies
and containers for metal tube and rod extrusion; hot extrusion tools;
2. Tools for the manufacture of hollows, screws, rivets, nuts and bolts.
3. Die casting tools, forming dies, die inserts, hot shear blades.
 
Heat Treatment
Annealing
750 to 800°C (1382 to 1472°F)
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr (50 to 68°F/hr) down to approx. 600°C (1112°F), further cooling in air. Hardness after annealing: max. 235 HB.
           
Stress relieving
600 to 650°C (1112 to 1202°F)
Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After through heating, hold in neutral atmosphere for 1 - 2 hours.
 
Hardening
1010 to 1050°C (1850 to 1922°F)
Oil, salt bath (500 - 550°C / 932-1022°F), air
Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness: 52 - 56 HRC
 
Tempering
Slow heating to tempering temperature immediately after hardening / time in furnace 1 hour for each 20 mm of work piece thickness, but at least 2 hours / cooling in air. It is recommended to temper at least twice. A third tempering cycle for the purpose of stress relieving may be advantageous. 
1st tempering approx. 30°C (86°F) above maximum secondary hardness.
2nd tempering to desired working hardness. The tempering chart shows average tempered hardness values. 
3rd for stress relieving at a temperature 30 - 50°C (86 to 122°F) be low highest tempering temperature.
 

What we can offer
What we can offer?
 
We offer a wide range of steel products in a wide variety of dimensions and executions, acc.to the common international specifications or customerized.
Machining and heat treatment are available.
Also, we advise you in choosing the right materials.
 
Shape Available
Solid round bar
Flat bar
Square bar
Hexagon bar
Block
Plate
Sheet
Wire rod
Strip

 

 
Note:
1). √ means we have stoc
2). Delivery Condition:
Smelting: EAF+LF+VD (+ESR)
Making: Hot rolled, Cold rolled, Forged, Cold Drawn
Heat Treatment: Untreated, Annealing, N+T, Q+T
Surface: Black, Peeled, Turned, Milled, Grinded, Polished
 
Packing & Shipping
Hot keywords:high quality