D2

Properties of AISI D2

AISI D2 It is a tool grade steel used for its versatility in stamping and cold forming operations, being equivalent to ASTM A681-08: D2, DIN 1.2379 (X153CrMoV12), and JIS SKD 11. Its chemical composition covers a range of %C (1.40 – 1.60), %Si (0.10 – 0.60), %Mn (0.10 – 0.60), %Cr (11.0 – 13.0), %Mo (0.70 – 1.20), %V (0.50 – 1.10), %P (≤ 0.030), and %S (≤ 0.030). Supplied in annealed condition with maximum hardness of 269 HB (~ 28 HRC), AISI D2 exhibits remarkable physical properties such as thermal conductivity of 21.0 W/m°C, coefficient of thermal expansion of 11.2 x 10-6/°C in the range of 0 – 200°C, approximate mechanical properties at room temperature yield strength is 2,150 MPa (~ 312,000 Lb/in2), at 60 HRC, at room temperature.

Features of AISI D2 

The distinctive characteristics of AISI D2 range from its high resistance to wear and compression to its good hardenability and dimensional stability during heat treatment, however, its low toughness compared to other steels makes it sensitive to chipping or fracture.

In heat treatment, it is recommended to relieve stress after severe machining and before hardening by transformation to martensite, using the tempering temperature to obtain the required strength and hardness. In addition, AISI D2 can be subjected to thermochemical treatments such as nitriding to improve its resistance to wear and erosion, with specific precautions to ensure the integrity of the tool.

In summary, AISI D2 is a standout solution in the world of cold work tool steels, offering exceptional properties and versatility to meet various needs in industrial and machinery applications.