DIN 1.2083/AISI 420 Forged Blocks are widely used for making plastic molds and transparent plastic molds which require high load, wear resistance, and work under the action of corroding medium.
DIN 1.2083 / AISI 420 Steel Forged Blocks for Plastic Mold Making
Equivalence
AISI/SAE
DIN / W.Nr
JIS
GB
420
1.2083
SUS 420J2
4Cr13
Chemical Composition (%)
Steel Grade
C
Si
Mn
P
S
Cr
1.2083
0.36 0.42
≤ 1.00
≤ 1.00
≤ 0.030
≤ 0.030
12.50 14.50
420
≤ 0.15
≤ 1.00
≤ 1.00
≤ 0.030
≤ 0.030
12.00 14.00
4Cr13
0.36 0.45
≤ 0.60
≤ 0.80
≤ 0.030
≤ 0.030
12.00 14.00
Dimensions
Thickness (mm)
Width (mm)
Length (mm)
150-600
200-1500
2000-5800
Delivery Condition
EAF+LF+VD+(ESR), Forged, Unmachined or Machined surface, UT 100% Passed
We offer two conditions as
Annealed: Hardness ≤ 235HB
Q+T: Hardness 33-38 HRC or as customized
Characteristics
Martensite stainless steel, with good machinability and excellent corrosion resistance, polishability, and high strength and wear resistance after heat treatment.
Application
It is widely used for making plastic molds and transparent plastic molds which require high load, wear resistance, and work under the action of corroding medium.
Forging Technique
Heat Temperature
Start Forging Temperature
Finish Forging Temperature
Cooling Method
Slowly heat to 800°C, then quickly heat to finaL forging temperature
1160– 1200°C
>=850°C
Ash coolinor sand cooling, with timely annealing
Heat Treatment
1. Annealing
840 to 870°C
Slow controlled cooling in the furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air.Hardness after annealing: max. 229 HB.
2. Stress relieving
Approx. 650°C
Slow cooling in the 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.
3. Hardening
1000 to 1050°C / Oil, air
Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness: 53-56 HRC
4. 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.
For average hardness figures to be obtained please refer to the tempering chart.
We use cookies to enable all functionalities for best performance during your visit and to improve our services by giving us some insight into how the website is being used. Confirms your acceptance of these cookies.
