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| Heico-Lock Washers | Material Properties | Operational Temperature Range |
|---|---|---|
| Carbon Steel | Delta Protekt® zinc coating; SAE J-403-AISI 1042/1045 or similar high carbon steel; through hardened to min. HRC 46 | -20°C to +200°C |
| 316L Stainless Steel | 316L austenitic stainless steel to EN1.4404; good acid resistance; surface hardened | -160°C to +500°C |
| 254 SMO® Stainless Steel | High alloy austenitic stainless steel to EN1.4547; high resistance to general corrosion and stress corrosion cracking; higher strength than conventional austenitic stainless steels; good weldability; surface hardened | -160°C to +500°C |
| Inconel® 718 Nickel-Chromium Alloy/Alloy 718 | Nickel based heat resistant alloy; good tensile, fatigue, creep and rupture strength; surface hardened | -160°C to +700°C |