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ASTM A 681 D2 Details

ASTM A 681 D2 Standard Download

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A 681 D2 Application:Cold working die steel

Category Type Grade Designations
Grades Tool Die Steels A 681 D2 USA - ASTM , A 681 (2008) - Tool Steels Alloy

Chemical composition(wt.%) of A 681 D2 grade: A 681 (2008)

Elements Min.（≥） Max.（≤） Similar Remarks
C 1.40 1.6
Si - 0.6
Mn - 0.6
P - 0.03
S - 0.03
Cr 11.50 13.00
Ni - 0.25
Cu - 0.30
V - 1.00
Mo - 0.70
D2 steel is high wear-resisting micro deformation of cold work die steel, belong to the wind type hard tool steel.The mass fraction of the carbon steel is as high as 1.5%, mass fraction of chromium is as high as 11.5%, the hardness after heat treatment can reach 60 HRC, but relatively ductility, toughness, rust resistant ability is weak, the steel surface is also difficult to make mirror polishing processing.With cold stamping products towards high precision, high efficiency, the development of more varieties, for die steel has good abrasion resistance and toughness.Compared with Cr12MoV steel, on chemical composition of the steel increased Mo, V, changed the steel casting organization, improved the morphology of austenite dish, strong toughness and abrasion resistance is better than that of Cr12MoV steel, improve the service life of the mold.Due to the yield point and the plastic deformation resistance of the steel is Cr12MoV steel is high, so the forging properties and hot molding Cr12MoV steels are slightly older.

hardness
Annealing acuities were 255 hb, indentation diameter of 3.8 mm or more;
Quenching acuity 59 HRC
Heat treatment specification
Quenching, 820 + 15 ℃ preheat, 820 + 6 ℃ (salt bath) or 1010 + 6 ℃ heating furnace atmosphere,
Cold insulation 10 ~ 20 min, empty, 200 + 6 ℃ tempering.

Mechanical properties of grade A 681 D2 A 681 (2008)

Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
994 (≥) 313 (≥) 22 41 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical properties of grade A 681 D2 A 681 (2008)

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
133 (≥) 697 (≥) 33 14 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 411
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
517 791 429

A 681 D2 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
Z2CND25-22Az AFNOR France
Iron and steel. Austenitic and austenic-ferritic stainless steels plates for boilers and pressure vessels
Z3CMD22-05-04Az AFNOR France
Stainless steels for general purposes. Plates, wide strips and strips
Z3CND22-05Az AFNOR France
Steel tubes - Welded austenitic stainless and austenitic ferritic steel rolled tubes for pressure service - Dimensions, technical conditions for delivery
Z3CND25-06Az AFNOR France
Steel tubes - Welded austenitic stainless and austenitic ferritic steel rolled tubes for pressure service - Dimensions, technical conditions for delivery
Z3CND25-07Az AFNOR France
Medico-surgical equipment - Materials for ancillary positioning instruments for surgical instrument - Martensitic, precipitation hardening, austenitic and austeno-ferritic stainless steels
Z3CMND22-05-04Az AFNOR France
Iron and steel. Austenitic and austenic-ferritic stainless steels plates for boilers and pressure vessels
Z4CND22-16-03Az AFNOR France
Iron and steel. Stainless steel for general purposes. Semi- finished products, bars and wire rod
Z5CND27-05Az AFNOR France
Iron and steel. Stainless steel for general purposes. Semi- finished products, bars and wire rod
D2 ASTM USA
Cold-Work Tool Steel
A 681 D2 ASTM USA
Cold working die steel

Relevant products

A 681 D2 Steel Stock

Steel grade Dimension Shape Unit Quantity Delivery state Query
D2 Round bar Φ25-Φ380mm Round Bar Kgs 45325 Hot-Rolled+Annealed+black Enquiry

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