Astm H13 Quenching Temperature Explained Correct Austenitizing For Long Die Life - China

ASTM H13 Quenching Temperature - Setting the Right Austenitizing Window The quenching (austenitizing) temperature is the single most decisive parameter in ASTM H13 heat treatment.

Set it right and the die reaches full hardness with a fine grain structure; set it wrong and you trade away toughness for hardness.

Songshun, a special steel producer with nearly 20 years of experience, summarizes the values we use on our own heat treatment lines for H13 (W-Nr.

1.2344, JIS SKD61, GB 4Cr5MoSiV1).

Recommended quenching temperature range for ASTM H13:

- Standard austenitizing: 1020-1060°C (1870-1940°F)

- Typical production setpoint: 1030-1040°C

- Upper limit caution: above 1070°C, grain growth accelerates and impact toughness drops sharply

- Lower limit caution: below 1000°C, alloy carbides do not fully dissolve and hardness falls short Preheating stages before quench:

- First preheat: 650-700°C, hold for equalization

- Second preheat: 800-850°C before final transfer to austenitizing temperature

- Soak time: about 25-30 minutes per inch (1 hour per 25mm) of section thickness Quenching media:

- Vacuum furnace with 5-6 bar nitrogen gas quench: preferred for distortion control

- Oil quench: acceptable for simpler shapes; parts should be quenched to 60-80°C then tempered immediately

- Interrupted quench (martempering) for complex die geometries After quenching - do not skip:

- As-quenched hardness: 55-58 HRC

- Temper immediately at 550-570°C, double temper minimum

- Final working hardness target: 44-50 HRC for hot work dies Section-size note: large blocks (over 300mm) benefit from lower austenitizing within the window plus extended soak to ensure full carbide solution without core cracking.

Songshun supplies ASTM H13 in annealed, pre-hardened or fully heat treated condition with hardness charts, UT reports and EN 10204 3.1 certification.

Need advice for a specific die geometry? Send your drawing - our engineers reply with material data within 24 hours.

Songshun Company Website: https: //songshunsteel.

com/

Company Contact:

• Posted By: Songjie Forging Co., Ltd

• Phone: +86 18269260283

• Address: , China

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• Business Description: Songjie Forging Co., Ltd is a top custom open-die forging manufacturer and supplier in China with over 20 years of experience.
  
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