NOS425 Die Steel Similar 1.2367 / DIEVAR / 8418 / W403 / DH31-S

CISRI steel

NOS425 Die Steel Similar 1.2367 / DIEVAR / 8418 / W403 / DH31-S
NOS425 Die Steel Similar 1.2367 / DIEVAR / 8418 / W403 / DH31-S
NOS425 Die Steel Similar 1.2367 / DIEVAR / 8418 / W403 / DH31-S
NOS425 Die Steel Similar 1.2367 / DIEVAR / 8418 / W403 / DH31-S
NOS425 Die Steel Similar 1.2367 / DIEVAR / 8418 / W403 / DH31-S
NOS425 Die Steel Similar 1.2367 / DIEVAR / 8418 / W403 / DH31-S
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Description
What we can offer
Packing & Shipping
Description
NOS425 Die Steel Similar 1.2367 / DIEVAR / 8418 / W403 / DH31-S
 
Features
NOS425, high quality hot work die steels, produced by SUPER technology.
High purity, homogeneous annealing structure, great toughness and ductility, that is helpful to reduce the risks of die cracks to the max.
NOS425 is applied for making die casting die, hot extrusion die, hot forging die, and hot stamping die, which is under the harsh production condition. It also can be used for making some kind of plastic mould because of its high mirror polishing performance.
NOS425 is strictly inspected as per standard of NADCA#207-2011, and other properties also can be tested as customers’ requirement.
 
Equivalence

AISI

ASSAB

DIN

BOHLER

JIS

DAIDO

BS

H13

8418

1.2367

W403

----

DH31-S

----

 
Chemical Composition (%)

C

Si

Mn

P

S

Cr

Mo

V

0.38
0.41

0.20
0.30

0.40
0.60


0.020


0.0005

5.00
5.50

2.20
2.50

0.40
0.60

 
Dimensions

Shape

Thick / Dia. (mm)

Width (mm)

Round

100-500

/

Block

100-400

200-1000

 
Delivery Condition
EAF+LF+VD+ESR, Forged, Spheroidizing Annealed, EFS, Hardness≤200HB, Black surface or Machined surface, UT 100% Passed
 
 
                          
Take the advanced melting process for smelting and refining to get the super purified and homogeneous steels.
 
Take the advanced 3D forging technology to thinning the structure; eliminate the internal defect like shrinkage cavity and porosity; break the big-sized carburization and reduce the band segregation. It is helpful to reduce the discrepancy in the different directions of the steel.
 
Take the advanced Super-fining heat treatment technology to get the small grain size and homogeneous structure.
 
Take the strict inspection for each piece of steel products according to the most advanced standard. Ensure our customers use the steels with excellent and stable quality.
 
Physical Property (Q+T to be 45HRC)

Temperature

Density
Kg/m3

Elasticity Modulus
Mpa

Thermal Expansivity
X 10-6/℃

Thermal Conductivity
W/(m℃)

20

7780

210000

--

--

400

7700

180000

12.7

31

600

7600

145000

13.3

32

 
Mechanical Property (Room temperature, S-T direction)

Hardness
HRC

Tensile Strength (Rm)
Mpa

Yield Strength (RP0.2)
Mpa

Reduction of Area(ψ)
Mpa

44

1480

1210

55%

48

1640

1380

55%

52

1900

1560

52%

 
Heat Treatment
Soft Annealing
Heating steels upto 850℃ in protective atmosphere; after soaking, then have cooling in the furnace at the rate of 10℃/hr; after temperature comes down to 650℃, finally have air cooling.
           
Stress relieving
Stress Relieving should be done on the die after rough machining, heating upto 650℃, heat preservation for 2 hours; Slow cooling down to 500℃, further air cooling.
 
Hardening
Refer to Hardening Diagram,
Preheating in two steps as per A: 650℃ and B: 850℃.
In case preheating in three steps, 2nd step B: 820℃, 3rd step use 900℃.
Austenization as per C: 1020-1030℃
Direct cooling as per D, or Sectionalized cooling as per F:500-550℃
 
              Hardening Diagram                    Tempering Diagram
 
Tempering
Refer to Tempering Diagram. Choose the proper tempering temperature for required hardness.
For die casting mould, temper at least 3 times.
For hot forging die and extrusion die, temper at least 2 times.
After tempering, it must need cooling down to room temperature.
Holding time for tempering is 2 hours min..
Tips: To avoid the temper brittleness, don’t temper in 500-550℃.
 
Hardness: HRC                                       Residual Austenite %
      Tempering Temperature (2h+2h) ℃
 
Tips
1. Holding time means the duration of die steel from total heating to Austenitization.
2. During hardening process, steel must be heated to avoid oxidation or decarburization.
3. Steels need to be tempered immediately when temperature gets down to be 50-70℃.
4. To get excellent property for the die, the quenching speed should be as fast as possible,    
    but should avoid the case of being out of shape or cracks.
 
If you need more details, please refer to “Heat Treatment Manual” or consult us.
 
Quenching Holding Time and Thickness

Thickness
mm

Time
Sec

Thickness
mm

Time
Sec

5

60

50

300

10

90

60

390

20

160

70

420

30

240

80

440

40

280

90

495

 

Product Application

Industry

Features

Steel Grade Recommendation

Die Casting

Die Casting is a kind of metal casting technique. It is characterized by using the mould cavity to have high pressure on molten metal. It has the good performance in anti heat cracking, anti corrosion, anti-crack, red hardness.

NOS411,
NOS415,
NOS425,
NOS430,
NOS560

Hot Extrusion

Before extrusion, heat the metal over temperature of recrystallization. It has the good strength at high temperature, high ductility and good toughness, high thermal fatigue resistance and thermal wear resistance, as well as the anisotropic properties of consistency.

NOS411,
NOS415,
NOS425,
NOS430

Hot Forging

Hot forging is a kind of processing under the condition of over the temperature of recrystalization. It has the good thermal wear resistance, heat intensity, high ductility and good toughness, high thermal conductivity.

NOS411,
NOS415,
NOS425,
NOS430,
NOS560

Hot Stamping

Hot Stamping is the rapid molding in the mould blank and hardening heat. It has the good thermal conductivity, hot bending strength, high toughness and ductility.

NOS411,
NOS415,
NOS425,
NOS430,
NOS560

Injection Molding

Injection molding is a kind of forming process of injection and molding at the same time. It has the high polishability, good corrosion resistance, wear resistance, anti-cracking and thermal conductivity.

NOS411,
NOS415,
NOS425,
GY336

Compression Molding

Compressing Molding is a process of solidifying the thermosetting plastics through heating and pressing. It is usually used for plastic molding with reinforced glass fiber. It has the good wear resistance, strength, hardness and corrosion resistance.

NOS411,
NOS415,
NOS425,
GY336

Blow Molding

Blow Molding is a process blowing the raw materials in the closed mould to be the hollow products by gas pressure. It has the medium strength and wear resistance, good thermal conductivity and corrosion resistance.

NOS411,
NOS415,
NOS425,
GY336

Extrusion Molding

Extrusion Molding is a kind of process making the heat plasticized materials to be a specific profile though extrusion. It has the medium strength, but high demand on corrosion resistance and wear resistance. Nitridation is generally used for the mould of fiber reinforced products.

NOS411,
NOS415,
NOS425,
GY336

 
Performance Comparison
 
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
 
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