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Hot Rolled DIN 1.2581 / AISI H21 Die Steel Round Bar

China Hot Rolled DIN 1.2581 / AISI H21 Die Steel Round Bar, Find details about China Die Steel Bar, Round Bar from Hot Rolled DIN 1.2581 / AISI H21 Die Steel Round Bar

Model NO.
DIN 1.2581/AISI H21
Special Use
Mold Steel
Size Range
Dia 20-480 mm
Shape
Round
Delivery Terms
Fob, CFR, CIF
Name
H21 Die Steel Round Bar
Country of Original
China
Style
Mold Steel Bar
Trademark
without
Transport Package
Sea Worth Packaging
Specification
H21, 1.2581, SKD5
Origin
China
Model NO.
DIN 1.2581/AISI H21
Special Use
Mold Steel
Size Range
Dia 20-480 mm
Shape
Round
Delivery Terms
Fob, CFR, CIF
Name
H21 Die Steel Round Bar
Country of Original
China
Style
Mold Steel Bar
Trademark
without
Transport Package
Sea Worth Packaging
Specification
H21, 1.2581, SKD5
Origin
China
Description
DIN 1.2581 / AISI H21 Die Steel for Hot Extrusion Die
 
Equivalence

AISI / SAE

DIN / W.Nr

JIS

GB

H21

1.2581

SKD5

3Cr2W8V


 
Chemical Composition (%)

Steel Grade

C

Si

Mn

P

S

Cr

V

W

1.2581

0.25
0.35

0.10
0.40

0.15
0.45

≤
0.030

≤
0.020

2.50
3.20

0.30
0.50

8.50
9.50

H21

0.30
0.40

0.15
0.30

0.20
0.40

≤
0.030

≤
0.030

3.00
3.75

0.30
0.50

8.75
10.00


 
Dimensions

Shape

Thick / Dia. (mm)

Width (mm)

Round

8-600

/

Flat

6-200

20-910

Block

150-500

200-1000


 
Delivery Condition
EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Hardness≤235HB, Un-machined or Machined surface (Peeld, Turned, Grinded), UT 100% Passed
 
Characteristics
Hot work tool steel for oil or air hardening to develop high hot strength, retention of hardness, and heat checking resistance.
 
Applications
1. Highly stressed hot work tools, 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.
 
Forging Technique

Heat
Temperature

Start Forging
Temperature

Finish Forging
Temperature

Cooling Method

1130-1160 °C

1080-1120 °C

900-850 °C

Slow cooling in furnace or thermoinsulating material


 
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
1070 to 1150°C (1958 to 2102°F)
Oil, salt bath (500 - 550°C / 932-1022°F), air
Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness:
48 - 52 HRC in oil or salt bath,
44 - 48 HRC in air.
 
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. 
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

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