Alloy Steel with 4Cr13 Good Polishability Machinability Plastic Die Steel Plate Metal Sheet Pipe

• Type: Sheet
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Check Detailed Description
• Technique: Hot Rolled
• Shape: Flat
• Surface Treatment: Black, Machined
• Model NO.: 4Cr13
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Transport Package: Nude Packing
• Specification: check detailed description
• Trademark: Ningbo Ningshing
• Origin: China

Product Description

 

DIN 1.2083 Plastic Mold Steel | AISI420 | GB4Cr13

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

 

Equivalence

AISI / SAE	DIN / W.Nr	JIS	GB
420	1.2083	SUS420J2	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

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

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
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.

 

Q1: What is Ningbo Ningshing Precision Machinery Group Co., Ltd ?
A1: Ningbo Ningshing Precision Machinery Group Co., Ltd., formerly known as Ningbo Ningshing Special-Steel Group Co., Ltd., is the leading distributor of Special Steel, and also a professional mold base maker in China. Our business involves special steel trading, machining processing, mold base making, heat treatment, CNC machines manufacturing.


Q2: Are you a manufacturer or a trader? 
A2: For Special Steel, we are the one of the leading distributors and service center in China. 9 warehouses with over 50,000 tons of regular stock. Our workshop has various kinds of equipments for sawing, milling, grinding, drilling etc.
For mold base, we are a professional manufacturer, with 24 sets of CNC machines, 3 axis and 5 axis, CMM for inspection. We produce medium-large sized mold base for plastic injection mold and die casting die.


Q3: How do you control the quality of steels?
A3: Firstly, we have very close and deep relationship with Chinese Prime Mills, choose supplier carefully, and regard them as the long term business partner. Based on the long term cooperation, we concentrate on special steel business and expand the market step by step. Secondly, we have own technical center which is formed by the experienced engineers and technicians whom ever worked for prime mills. We control the quality in production process, in-out warehouse.


Q4:: Which kind of processing can you do?
A4: We do machining processing like cutting, milling, grinding, turning, peeling, drilling, CNC machining. Meanwhile, we do vacuum heat treatment for die and mold.