• Model NO.：1.2343 Mod,DIN X38CrMoV51 Mod,AISI H11
• Special Use：Cutting Tools, Cutters in Common Steel, High-strength Steel Plate
• Stock：Stock
• Transport Package：Nude Packing
• Trademark：boz
• Origin：China
• Production Capacity：5000tons,Month

Brand NameRavne No.Mat. No.DINENAISIRAVNEX8681.2343 Mod.X38CrMoV51 Mod.X38CrMoV51 Mod.H11 Mod.

Chemical Composition (in weight %)

CSiMnCrMoNiVWOthers0.360.200.305.001.35-0.45--

Description
RAVNEX is supreme steel grade in the group of hot work tool steels. Special production methods ensure optimal parameters in all phases of steelmaking, providing this steel grade with supreme characteristics resulting in a higher tool durability. This steel incorporates the knowledge and experience of many generations of tool steel specialists. 

Applications
Above all, the RAVNEX grade is designed for die casting of light metals and alloys (aluminium and aluminium alloys), for die forging of steel and non-ferous metals (e.g. cupper) and their alloys, for extrusion of tubes, barrels and sections made of light metals and alloys, for casting and processing of various plastics, and for glass processing. Characterics: Excellent homogeneity, high cleanliness, high level of isotrophy, good workability, high impact toughness, good polishability. Advantages: Lower cost due to: Higher tool life, lower tool wear, less tool repair, less tool changes and consistent heat treatment results. 

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10³ x N/mm²]: Approx. 215 
Density [g/cm³]: 7.85, 7.69 (500^oC), 7.65 (600^oC) 
Electric resistivity [Ohm mm²/m]: Apprx. 0.50
Specific heat capacity[J/g.K]: Approx. 0.46
Transformation points: Ac₁=805^oC, Ac₃=880^oC

Thermal Conductivity [W/m.K] vs. Temperature

100^oC200^oC300^oC400^oC500^oC600^oC700^oC28.429.730.230.130.029.730.0

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

20-100^oC20-200^oC20-300^oC20-400^oC20-500^oC20-600^oC20-700^oC20-800^oC11.912.412.813.213.614.214.414.4

Continuous Cooling Transformation (CCT) Diagram

Click the image to enlarge the diagram.

Soft Annealing
Heat to 800-850^oC/ min. 4 hours at temperature then cool slowly in furnace. This will produce a maximum Brinell hardness of 209 HB.

Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx. 600-650^oC, holding for 3 hours at temperature, followed by slow cooling in furnace. This operation is performed to reduce distortion during heat treatment and to reduce stress after machining of tools prior to final heat treatemnt of tools.

Hardening
Harden from a temperature of 980-1000^oC/ 30 minutes at temperature, followed by oil, thermal bath, air, vacuum and protective atmosphere quenching.

Tempering
1st tempering: 20-30^oC over secondary peak in the tempering diagram.
2nd tempering: Tempering to a working hardness of tool.
Recommendation: 3rd tempering from 20-50^oC down to bellow the temperature of 2nd tempering.
Tempering: Slow heating up to tempering temperature is recommended, tempering tims: min. 2 hours and/or 1 hour for 20-25 mm thickness fo tool.

Tempering Temperature (^oC) vs. Hardness (HRC)

100^oC200^oC300^oC400^oC500^oC550^oC600^oC650^oC54535251.552524738

Tempering Diagram

Click the image to enlarge the diagram.

General Diagram of Heat Treatment

 

Microstructure
When annealed, the RAVNEX microstructure consists of equally distributed secondary carbides in the form of globules in a ferritic base along the whole section. To achieve such microstructure in an annealed condition, special advanced metallurgical methods are carried out in all phases of steel production. When annealed, hardness ranges between 170 and 209 HB. RAVNEX provides a uniform hardness and toughness along the entire tool cross-section. This is achieved with a uniform distribution of secondary carbides in steel, even after hardening and tempering.

Microstructure of annealed RAVNEX steel,
SEP 1614:1916, Mag. 500X.

Purity of steel RAVNEX
In comparison with a standard steel grade, RAVNEX provides a high level of cleanliness. According to standard DIN 50602, the required K1 cleanliness is maximum of 15.

Cleanliness of steel RAVNEX according to DIN 5062.

Mechanical Properties
Impact Toughness (KV) vs. Hardness

A Comparison of Impact Toughness (Standard Steel Grade) vs. RAVNEX


Note: Accoridng to SEP 1314: 1996, hardened and tempered: 43-46 HRC,
forging core, transverse section. 

Tempering Diagram and Impact Toughness

Note: Impact test pieces (KV and KU) are cut out of the core in transverse section
of the forging. Heat treatment: Temperature of hardening: 1000^oC/oil and double
tempering 2 hours each in a temperature interval of 100^oC to 650^oC. EN 10045:-1,
temperature of testing: 20^oC. 

Diagram of Impact Toughness (KU) vs. Temperature

Note: EN 10045:-1, temperature of testing: 20^oC. 

Diagram of Impact Toughness (KV) vs. Temperatures

Note: Impact test pieces (KV and KU) are cut out of the core in transverse
section of the forging. Heat treatment: Temperature of hardening: 1000^oC/oil
and double tempering to the hardness of 45 +/- HRC. 

Forging
Hot forming temperature: Please ask. 

Machinability
Please see the section bellow.

Nitriding
RAVNEX is suitable for nitriding and nitrocarburizing. Surface hardness over 1000 HV_0.3can be achieved by gas, plasma, or salt processes. Nitriding must be performed 20-50^oC below a previous tempering temperature, depending on the process time and temperature, to avoid loss of hardness, strength, and dimensional changes of the workpiece. Essential benefits of a hard nitrided or nitroCarburizingd surface lie in an improved.

Welding
RAVNEX can be welded successfully by the MMA or GTA welding process, provided that proper precautions are taken before, during, and after welding. Laser weld repair of smaller cracks and edges is recommended to minimize negative effects of high residual stresses in weldments and heat affected zones. GTA welding is generally performed using AISI H11 consumables. Proper weld preparation is crucial; cracks are ground out to sound steel, correct joint slope and bottom radius shall be considered. Welding can be performed in soft annealed or hardened and tempered condition. In both cases, a preheat to 350^oC is recommended. This temperature is to be maintained throughout welding. After welding, soft annealed or hardened and tempered parts are slowly cooled down to between 70 and 100^oC, then soft annealed or tempered 20^oC below the last tempering temperature.

Dimensional Changes During Hardening
Temperature gradients in a workpiece during quenching often cause high stresses which cause distortion. Stress relief annealing between rough and semi-finish machining prior to hardening is recommended to limit distortion during quenching. Minimum machining allowance to account for Ravnex distortion during a correctly performed rapid quench is 0.4% of the characteristic workpiece dimension, provided that stress relief annealing has been performed.

Electrical Discharge Machnining
Surfaces which are subjected to the Electrical Discharge Machnining (EDM) process must be ground or blanched ground to remove the brittle, resolidified surface layer. In addition, the material subjected to EDM must be tempered about 20^oC bellow the previous tempering temperature to give a temper to the rehardened and untempered layer underneath. Both layers are very brittle and such detrimental to die performance.

Aluminium Die Casting Tool Life

Maximum results are achieved when steel producers, tool producers and product producers combine their knowledge and experience. Tehnical support from production combined with sales expertise is required to service these products. We offer a vast knowledge in the production of hot work tool steels.

Comparison of die casting cycle numbers between RAVNEX and competitive
steel grades. 

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

 

 

AISI

DIN

JIS

Stock

Application

Hot Work Tool Steel

H11

1.2343

SKD6

√

Die Casting Dies,Extrusion Dies, Hammer Dies,
Ram Dies,
Forging Dies
etc.

H13

1.2344

SKD61

√

H10

1.2365

SKD7

 

--

1.2367

--

 

L6

1.2714 / 1.2713

SKT4

√

H12

1.2606

SKD62

 

H21

1.2581

SKD5

√

Cold Work Tool Steel

D3

1.2080

SKD1

√

Cutting Tools, Punching Tools, Shear Bladers, Reamers, Thread Rolling Dies, Calipers, Sockets etc.

--

1.2601

~SKD11

√

D2

1.2379

~SKD11

√

--

1.2379 MOD

DC53 (Daido)

√

D6

1.2436

--

 

O1

1.2510

SKS3

√

O2

1.2842

--

 

A2

1.2363

SKD12

 

S1

1.2550

--

 

S7

1.2357

--

 

--

1.2767

SKT6

 

L2

1.2210

--

 

Plastic
Mould Steel

P20

1.2311

--

√

      Mold Base,           Core & Cavity,         Bumper Mold             etc.         

P20+Ni

1.2738

--

√

P20+S

1.2312

--

√

--

1.2316

--

 

420

1.2083

SUS420J2

√

--

--

NAK80 (Daido)

√

Alloy Steel

4120

25CrMo4 / 1.7218

SCM420

 

Shafts, Gears, Drillers, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Crankshafts, Connecting Rods, Came, Couplings  etc.

4135

34CrMo4 / 1.7220

SCM435

 

4130

34CrMo4 / 1.7220

SCM430

√

4140

   42CrMo4 /        42CrMoS4 /                1.7225             

SCM440

√

4142

41CrMo4 / 1.7223

SCM440

 

4145H

--

--

 

4330V

--

--

 

4340

34CrNiMo6 / 1.6582

SNCM439

 

5115

16MnCr5 / 16MnCrS5 / 1.7131

 

 

5120

20MnCr5 / 20MnCrS5 / 1.7147

SMnC420H

 

5140

41Cr4 / 41CrS4 / 1.7035

SCr440

√

8620

21NiCrMo2 / 1.6523

SNCM220

 

8640

40NiCrMo2-2 / 1.6546

SNCM240

 

--

18CrNiMo7-6 / 17CrNiMo6 / 1.6587

--

 

9840

36CrNiMo4 / 1.6511

--

 

E71400

41CrAlMo7-10 / 1.8509

SACM1

 

--

34CrAlNi7 / 1.8550

--

 

Bearing Steel

E52100

100Cr6 / 1.3505

SUJ2

√

Bearing, Shafts
etc.

--

100CrMn6 / 1.3520

--

 

--

100CrMo7-3 / 1.3536

--

 

Spring Steel

5155

55Cr3 / 1.7176

SUP9

 

Springs

6150

51CrV4 / 1.8159

SUP10

 

9261

60CrSi7 / 1.7108

--

 

Carbon Steel

1010

CK10 / C10E / 1.1121

S10C

 

Shafts, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Came, Couplings  etc.

1020

C22 / 1.0402

S20C

√

1040

CK40 / C40E / 1.1186

S40C

√

1045

CK45 / C45E / 1.1191

S45C

√

1050

CK50 / C50E / 1.1206

S50C

√

1055

CK55 / C55E / 1.1203

S55C

 

1064

CK60 / C60E / 1.1221

S58C

 

High Speed Tool Steel

M2

1.3343

SKH51

√

Reamer,
      End-mill,         
Hob, Cutter, Bite, Drill, Punch, Tap, Brooch
etc.

M7

1.3348

--

 

M42

1.3247

SKH59

√

M35

1.3243

SKH55

√

T1

1.3355

SKH2

 

T15

1.3202

--

 

T42

1.3207

SKH57

 

 
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