Sen and Supply German GS-2311 plastic mold steel 2311 steel use:?? GS-2311 is a pre-hardened to 285-330HB (30-36HRC), Germany and Sweden 618 GS-2311 status rather, it can be directly used for molding processing, and has good dimensional stability, pre-hardened steel available to meet the needs of general purpose die life of up to 50W die times? GS-2311 Pre-hardened plastic mold steel, after heat treatment, machining and polishing good performance, more suitable EDM. It can be used for general manufacturing large plastic molds and plastic mold used. ?? Factory state:? Pre-hardened to 980-1080N / mm2 (30-34HRC) Steel Features: This steel is P20 plus 1.1% nickel, steel surface to the center uniform hardness, cutting good, sparks and extremely polished performance good, suitable gasification, hard chrome plating and titanium. Uses: suitable for demanding plastic mold, especially over 400MM thick of the mold. Annealing: 720-740 ℃ heat through insulation sufficient time, and then with the furnace cooling to 600 ℃, then cooled in air, the resulting hardness of about 240HB (highest). Stress relief: heating to 600 ℃ insulation in a protective gas furnace for about two hours, then slowly cooled in the furnace. ? Quenching: 840-860 ℃ after heat quenching oil, or 860-880 ℃ air-cooled heat slightly above room instantly after tempering, resulting hardness of about 54HRC. ? Tempering: Temper immediately after quenching, no less than 2-2.5 hours, then cooled baked. ?? Forged: 1050-850 ℃ annealing furnace cooling:?? 850-900 ℃ air cooling characteristics:???? High polished performance, good workability, excellent strength and toughness, can be downplayed or chrome. ?? 2311 mold steel use characteristics:???? ● pure steel vacuum degassing refining process for polishing or etch processing plastic mold. ?? ● Pre-hardened state supplied without heat treatment can be used directly in the mold, to shorten the construction period. ? ● by forging rolling processing, compact structure, 100% ultrasonic testing, non-porous, needle defects. ?? Purpose:?? ● thermoplastic injection molding, extrusion die. ?? ● thermoplastic blow mold. ?? ● overloading the main mold member. ? ● Cold structural parts. ? ● commonly used in the manufacture of TV cabinet, washing machine, refrigerator shells, buckets and so on. ?? Heat Specifications:? Hardening process: In order to improve die life up to 80 million times over, can be pre-hard steel quenched and tempered low and hard ways. Preheated quenching at 500-600 ℃ 2-4 hours and then at 850-880 ℃ holding a certain time (at least 2 hours), into the oil cooling to 50-100 ℃ oil cooled, quenched hardness of up to 50 -52HRC, in order to prevent the cracking temperature 200 ℃ tempered should be dealt with immediately, after tempering, the hardness can be maintained over 48HRC. ?? Nitriding treatment? Nitriding surface structure can be obtained with high hardness, surface hardness after nitriding reach 650-700HV (57-60HRC) Die life can be more than one million times, the nitride layer has a dense, smooth characteristics, mold releasability and anti-wet air and alkali resistance is improved. ?? Chemical composition:?? Carbon C: 0.38 Manganese Mn:?? 1.30 Chromium Cr: 1.85 Mo Mo:? 0.40 sulfur S:?? 0.008