2316 Stainless Steel Preferred for Durable Corrosionresistant Molds

In industrial manufacturing, molds face extreme challenges including high pressure, elevated temperatures, and exposure to corrosive chemicals. Material selection becomes critical, as improper choices can significantly reduce mold lifespan and compromise production efficiency. One steel alloy stands out for meeting these rigorous demands: 2316 stainless steel.

Known alternatively as DIN 2316 (Code X36CrMo17) and comparable to AISI420, JIS SUS420M, and S136 grades, 2316 stainless steel represents a chromium-molybdenum alloy steel renowned for its exceptional corrosion resistance, superior polishability, high toughness, thermal stability, and wear resistance. This material excels particularly in tooling applications involving chemically aggressive plastics such as PVC, making it the preferred choice among mold manufacturers worldwide.

As a martensitic stainless steel with elevated chromium content, 2316 maintains stable performance even when exposed to corrosive substances, extending mold service life.

The material's excellent polishability enables achievement of mirror-like surface finishes, crucial for molds requiring superior aesthetic output.

• High Toughness: Withstands significant impact and vibration without fracture or deformation
• Thermal Stability: Maintains strength and hardness at elevated operating temperatures
• Wear Resistance: Demonstrates exceptional resistance to abrasion and surface degradation
• Uniform Hardness: Consistent mechanical properties across all material orientations

The alloy offers excellent machinability across conventional and advanced processing methods, facilitating production of complex mold geometries.

• Plastic Injection Molds: Particularly effective for corrosive plastic materials including PVC
• Die Casting Tools: Withstands high-pressure metal forming processes
• Extrusion Dies: Maintains dimensional stability in continuous production environments

• Annealing: 810-830°C process achieving maximum 235 HB hardness
• Stress Relief: 600-650°C treatment followed by furnace cooling
• Quenching: 1020-1040°C heating with oil quenching to 500-550°C (48-52 HRC)
• Tempering: Temperature-dependent hardness adjustment:

  Temperature (°C)	Hardness (HRC)
  100	49
  200	47
  300	46
  400	46
  500	47
  600	32