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AISI D2 / DIN 1.2379 Cold Work Tool Steel


Cold work tool steel  DIN 1.2379/ AISI D2 ---- is chrome-molybdenum-vanadium steel with big hardenability for hardening in oil and in air, especially high resistance to the wear (higher than by 1.2080), good cutting power, very good firmness in the pressure, lower toughness (but higher than by 1.2080). This steel shows good dimensional stability at the heat treatment, suitable for hardening to the secondary hardness (the possibility of nitriding). Further the steel is very difficult to sharpen, it works at the heat with difficulties and has a rather difficult workability in the annealed state.


Equivalent Grade of DIN 1.2379                    

Standard

Grade

AISI/SAE

D2

W.Nr/DIN

1.2379

JIS

SKD10

GB

Cr12Mo1V1

 

 

Chemical Composition of  steel  DIN 1.2379/ AISI D2 (%)

C

Si

Mn

Cr

Mo

V

1.50-1.60

0.10-0.40

0.15-0.45

11.00-12.00

0.60-0.80

0.90-1.10


Hot Forming of steel  DIN 1.2379/ AISI D2

Forging: 1050 to 850, slowing cooling in furnace.


Heat Treatment of steel  DIN 1.2379/ AISI D2

Annealing: 800 to 850, slow cooling in furnace (10-20/hr), down to approx. 600, cooling in air. Hardness after annealing: max. 250HB.

Stress relieving: approx. 650, slow cooling in furnace. Hold in neutral atmosphere for 1 to 2hours.

Hardening: 1010 to 1050, oil, air or hot bath at approx. 350 to 450. Hold 15 to 30 minutes. Hardness obtainable, 63 to 65 HRC.

Tempering: 520 to 570. Slowly heating to tempering temperature right after hardening. Recommended to temper 2 or 3 times to increase toughness.

Tempering

200

300

400

500

600

HRC

62

59

58

60

52

* Hardening temperature: 1030, specimen size: dia25mm

 

Surface treatment

Nitriding: suitable for nitriding.


Properties of steel  DIN 1.2379/ AISI D2

Good dimensional stability; excellent wear resistance due to the ledeburitic structure. Best toughness. Nitriding is possible.


Applications of steel  DIN 1.2379/ AISI D2

High performance blanking and punching dies for sheet thickness up to 5 mm; circular and straight shear blades for sheet thickness up to 4 mm; precision stamping dies; cold drawing tools, hobbing dies, thread cutting tools, cold pilger mandrels; flanging rolls; guide rolls; forming rollers for continuous production of steel profiles and tubes; small plastic moulds and inserts for abrasive materials.

 

Available Size of  1.2379 / D2 steel


Round:Dia 2-12mmcold rolled

Dia 12-50mmhot rolled

Dia 50-400mmforged

Flat/Suare:



Thickness:1-2.5mmcold rolled


3-40mmhot rolled


20-350mmhot forged

Width:800mm max



1.2379 / D2 round bar.jpg 1.2379 steel flat bar.jpg

Inquiry for AISI D2_DIN 1.2379 Cold Work Tool Steel, please contacr us!

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