Zhejiang Guanyu Stainless Steel Tube Co., Ltd  
  Directory | Useful Tool | Sitemap | Contact US | Home

         

Tool Steel

1.2311 Tool Steel






1.2311 P20 is a pre hardened high tensile tool steel which offers ready machineability in the hardened and tempered condition, therefore does not always require further heat treatment. This eliminates the risks, cost, and waiting time of heat treatment and avoids the associated possibility of distortion or even cracking. Subsequent 1.2311 component modifications can easily be carried out.

Prehardened plastics mould steel with good machinability, better than steel grade Mat. No. 1.2312, suitable for texturing. 1.2311 usually used on Plastic moulds, mould frames for plastic moulds, large injection moulds, pressure casting dies,recipient sleeves.

Forging:Heat slowly and uniformly to 1050°C. Do not forge below 930°C. After forging cool slowly.

Annealing:1.2311 should always be annealed after forging and before rehardening. Heat uniformly to 770/790°C. Soak well and cool slowly in the furnace.

Hardening: Heat uniformly to 840/870°C until heated through. Quench in oil. Tempering:Heat uniformly the 1.2311 tool thoroughly at the selected tempering temperature and hold at heat for one hour per 25 millimetre of total thickness.

Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx. 650°C, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.

Physical Properties at ambient temperature Modulus of elasticity [103 x N/mm2]: 210 
Density [g/cm3]: 7.83
Thermal conductivity [W/m.K]: 34.0 (100°C), 34.0 (150°C), 33.6 (200°C), 32.9 (250°C), 31.9 (300°C), in quenched and tempered condition.

Coefficient of Linear Thermal Expansion 10-6 °C-1

20-100°C 20-200°C 20-300°C 20-400°C 20-500°C 20-600°C 20-700°C
11.7 13.1 13.5 14.0 14.4 14.6 14.7

Continuous Cooling Transformation (CCT) Diagram



Soft Annealing
Heat to 710-740°C, cool slowly in furnace. This will produce a maximum Brinell hardness of 230.

Tempering Temperature (°C) vs. Hardness (HRC)

100°C 200°C 300°C 400°C 500°C 600°C 700°C
51 50 48 46 42 36 28

Tempering Diagram



Chemical Composition - 1.2311 Tool Steel

 C.

Si.

Mn. 

Cr. 

Mo. 

 0.40%

0.40% 

1.00% 

1.20% 

0.35% 


Tempering °C

  100

  200

  300

   400

   500

   600

   700

HRc

 51

 50

 48

 46

 42

  36

 28

N/mm²

1730

1670

1570

1480

1330

1140

 920

Nitriding:
Moulds machined from pre hardened 1.2311 may be nitrided to give a hard surface which is very resistant to wear and erosion. A nitrided surface also increases the corrosion resistance. The surface hardness after nitriding at a temperature of 525°C in ammonia gas will be approximately 650HV.

Temperature

Time

Approximate Depth of Case

525°C

20 hours

0.30mm

525°C

30 hours

0.35mm

525°C

60 hours

0.50mm

Tufftriding:
Tufftriding at 570°C will give a surface hardness of approximately 700HV. After 2 hours treatment the hard layer will be approximately 0.01mm

Flame & Induction Hardening:
1.2311 may be flame or induction hardened to a hardenss of 50 to 55 HRc. Cooling in air is a preferable option. Smaller pieces may however require forced cooling. Hardening should be immediately followed by tempering.

Hard Chromium Plating:
After hard chromium plating the steel should be tempered for approximately 4 hours at 180°C, in order to avoid hydrogen embrittlement.

Case Hardening:
In order to maintain maximum surface hardness 1.2311 may be case hardened. Before case hardening is carried out the steel should be annealed. To carburise, pack with carburising powder into a cast iron or heat resisting steel box and see that the articles are separated from the sides by at least two inches of carburising powder. Lute the lid with fireclay. Heat to the carburising temperature of 880°C and soak for sufficient time to give the required depth of case. Cool to 800/820°C and quench in oil. Tempering will then be necessary. Reheat to 200/300°C and allow to cool in the air to give a final  surface hardness of Rockwell C55/59

Welding:
Firstly heat to approximately 400 to 500°C. Weld .12311 at approximately 400 to 500°C and stress relieve. Use Chromium-Nickel-Molybdenum alloyed basic electrodes for welding of structural steels. Welding may also be carried out using an austenitic stainless steel electrode. In this case the stipulated increased working temperature may be modified, but the weld metal has a lower strength than the parent material

Physical Properties:     1.2311 Temperature:    
  20°C 200°C 400°C
Density (Kg/m³) 7800 7750  7700 
Coefficient of thermal expansion (per °C from 0°C) - 12.7 x 10-6 13.6 x 10-6
Thermal conductivity (J/m.s °C) 29.0 29.5 31.0 
Specific heat (J/kg °C)  460
Modulus of elasticity:      
Kp/mm²   20 900   20 400   18 900
N/mm² 205 000 200 000 185 000

Machining:
 Turning

 Rough

Medium 

Finish 

 Carbide Tools

Turning

Turning

Turning

 Depth of cut (t) mm

 min. 10

2-10

max. 2 

 Feed (s) mm

 mm 1.0

 0.3-1.0

max. 0.3 

 ISO Machining Group

 P30-P40

P20-P30 

P10 

 Cutting Speed

 40-60

60-100 

90-160 


Milling:    
Carbide Tools &

Rough

Finish

High Speed Steel Tools

Milling

Milling

Depth of cut (t)

min. 2

max.2

Feed (s) mm/tooth

min. 0.2

max. 0.2

ISO Machining Group

P30-P40

P10-P20

  Carbide Tools:
Cutting Speed (v) m/min.

55-85

75-95

  High Speed Steel Tools:
Cutting Speed (v) m/min.

10-20

15-30


 Mechanical Properties (at room temperature)   1.2311

 Tensile Strength

 1000-1068 N/mm²

 Yield Stress

 861-930 N/mm²

 Reduction of Area

 45-50%

Elongation

 14-17%


Pipes Tubes Plates Bars Square Tubes Weight Calculation Calculator
Pipe Working Pressure Calculation
Conversion Calculator Calculation-Pressure|Weight|Temperature|Volume|Length
Conversion Table-Pressure|Stress|Mass|Length|Temperature|SI Prelxes
Metals Weight Calculator -Aluminum|Brass|Bronze|Copper|Magnesium|Plastic|Nickel|Steel|Titanium|Zinc

1.2080|1.2083|1.2311|1.2344|1.2363|1.2379|1.2436|1.2510|1.2550|1.2767|1.2842|1.3343
AISI O1|AISI W1|AISI D2|AISI D3|AISI D6|AISI A2|AISI H13|AISI S1|AISI S7|AISI P20|AISI M2|AISI M42

1008|1010|1015|1018|1020|1025|1035|1040|1045|1050|1117|1141|1144|12L14|1215|4140 | 4150 | 4340 | 8620|A36|A653|A513

TubingChina.com All Rights Reserved

Directory | Standard | Heat | Heat Exchanger | Temperature | Pressure | Corrosion | Hardness | Surface | Properties | Select Stainless Steel | Contact US

Useful Tools:

Stainless Steel Weight Calculator
Metals Weight Calculator
Nickel Alloy Weight Calculator
Copper Brass Alloy Weight Calculator
Copper Brass Alloy Sheet Plate Weight Calculator
Sheet Plate Weight Calculator
Hardness Conversion Calculator
Hardness Conversion Chart
Rockwell Brinell Vickers Shore Hardness Conversion Chart
Conversion Calculator
Length Weight Temperature Volume Pressure Calculater
Pipe Working Pressure Calculator
Pressure Conversion Converter
Round Bar Size Calculator
Gauge Sizes
Sheet Metal Gauge
Pipe Schedule
Nominal Pipe Size
ANSI Pipe Chart
Inch to mm Chart
Stainless Steel Pipe Sizes
Stainless Steel Tubing Sizes Chart
Stainless Steel L H Grade
Stainless Steel Density
Conversion of Stainless Steel
Nickel Alloy Grades Comparison Material Grade Chart Carbon Steel
Structural Steel Comparison Chart



Main Products:

BA Tube | AP Tube
Condenser Tubes Tubing
Stainless Steel Reheater Tube Superheater Tubes
Stainless Steel U bend Tube
Nickel Alloy U bend Tubes
Copper Alloy U Bend Tubes
Heat Exchanger Tube
Super Duplex Pipe
Nickel Alloy Tube
Brass Alloy Tubing
Copper Nickel Alloys Tubes
Stainless Steel Hollow Tube
Stainless Steel Oval Tubing
Stainless Steel Square Tubing
Stainless Steel Rectangular Tubing
Stainless Steel Capillary Tube
Duplex Stainless Steel Pipe
Seamless Stainless Steel Tubing
Corrugated Stainless Steel Tubing
Stainless Steel Twisted Tube
Polishing Stainless Steel Tubing
Stainless Steel Aircraft Tube
Stainless Steel Hydraulic Tubing
Stainless Steel Instrumentation Tubing
Stainless Steel Angle Iron Bar
Stainless Steel Mechanical Tube
Bright Annealing Stainless Tube
Heat resistant Stainless Steel
Stainless Steel Welded Pipe
Extruded Serrated Finned Tubes Integral Finned Tubes / Extruded Aluminum Finned Tubes
Brass Alloys Copper Nickel Alloy Integral Low Finned Tubes
HFW High Frequency Welded Helical Spiral Serrated Finned Tubes
Corrosion Resistant Stainless Steel
Corrosion Resistance Stainless Steel

Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
316Ti Stainless Steel Tube
317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Duplex Steel
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube