Ningshing Special-Steel is the leading ditribution and stockist of DIN 1.2083 Plastic Mold Steel. Our large stock of DIN 1.2083 Plastic Mold Steel | AISI420 | GB4Cr13 can meet your demand with immediate delivery. The stock involves different size range of hot rolled /forged rounds and flats, forged blocks. Delivery condiion in Annealed or Q+T.
DIN 1.2083 Plastic Mold Steel is a kind of Martensite stainless steel, with good machincability and excellent corrosion resistance, polishability, and high strength and wear resistance after heat treatment. It is widely used for making plastic moulds and transparent plastic molds which require high load, wear resistance, and work under the action of corroding medium.
Dimensions Round: dia.10-500 mm Hot Rolled Flat: 6-200 x 300-1200 mm Forged Block: 150-500 x 200-1600 mm
Delivery Condition EAF+LF+VD+(ESR), Hot Rolled or Forged, Annealed or Q+T, Black surface or Machined surface, UT SEP1921 Class3 D/d
Hardness: 235 HB for Annealed condition, 30-36 HRC for Q+T condition
AISI / SAE
DIN / W.Nr
Characteristics It is a kind of Martensite stainless steel with low corrosion, high-alloy, low warpage steel for through hardening with excellent properties for mirror polishing as well as good photoetching, good machinability, high wear resistance and high dimensional stability.
Applications Used for making Mould plates and inserts for working with chemically aggressive plastics; because of excellent polishing, suitable for optical and medical products
Start Forging Temperature
Finish Forging Temperature
Slowly heat to 800°C, then quickly heat to final forging temperature
1160 - 1200°C
Ash coolinor sand cooling,with timely annealing
Heat Treatment Annealing 840 to 870°C Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air. Hardness after annealing: max. 235 HB.
Stress relieving Approx. 650°C Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After through heating, hold in neutral atmosphere for 1 - 2 hours.
Hardening 1000 to 1050°C / Oil, air Holding time after temperature equalization: 15 to 30 minutes. Obtainable hardness: 53-56 HRC
Tempering 100 to 200°C (212 to 392°F) Slow heating to tempering temperature immediately after hardening / time in furnace 1 hour for each 20 mm of work piece thickness but at least 2 hours / cooling in air.