TENAX 300IM Steel

TENAX 300IM Steel

Steel name: TENAX 300IM
Diagram No.: 1800
AISI/SAE designation: H13
Chemical composition in weight %: 0.36% C, 0.30% Si, 5.00% Cr, 1.40% Mo, 0.40% V
Steel group: Hot work tool steels
Applications: No data
Reference: Not shown in this demo version.

Heat Treatment
Hardening: In a controlled atmosphere, preheat thoroughly at 1300 to 1400°F. Then heat to 1850°F a nd hold for an hour per inch of greatest cross section. Quench in still air and temper immediately. When maximum hardness is the primary requirement, H13 may be oil quenched, but keep in mind that when oil quenched, this grade is vulnerable to cracking and has the same distortional characteristics as an oil hardening tool steel.
Tempering: For hot work applications, H13 is used in the hardness range of HRC 38 to 48. The usual hardness range for die casting dies is HRC 44 to 48 requiring a temper at approximately 1100°F. For improved shock resistance, the steel is often te mpered at temperatures approaching 1150°F, resulting in hardnesses of HRC 40 to 44. The steel should be held at the tempering temperature for at least two hours per inch of greatest cross section. All hot work steel should be tempered at a minimum of 50 de grees above the expected maximum operating temperature of the tool or die. Double tempering, with the second temper of 25 to 50 degrees lower than the first temper is always advisable, particularly where heat checking is a problem. Hardness tests were made on 1-in. round specimens of H13 which were air quenched from 1850°F and tempered for two hours at various temperatures. The results below may be used as a tempering guide, keeping in mind that tools of heavy section or mass may be several points lower in hardness.
Diagram note: The legend: Temperatura de Revenimento-Tempering temperature, Dureza-Hardness, sample size 20 x 20 mm2.

Tempering Diagram

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