Nx344 / 1.2344 ESR Plastic Mold Steel Coil Plate Bar Pipe Fitting Flange

• Type: Steel Plate
• Standard: ASTM, AISI, GB, JIS, DIN, BS
• Certification: ISO, RoHS, AISI, ASTM, GB, En, DIN, JIS
• Surface Treatment: Blackface
• Technique: Hot Rolled/Forged
• Application: Mold & Dies, Boiler Plate
• Model NO.: NX344/1.2344
• Special Use: Cutting Tools, Measuring Tools, High-strength Steel Plate
• Stock: Stock
• Grade: 1.2316/1.2344/S136/420/4Cr13
• Transport Package: Export Standard Packing or Customers′ Demand
• Specification: According to customer requirements
• Origin: China
• Production Capacity: 5000tons/Month

Product Description

Description
NX344 / 1.2344 ESR Forged Blocks for Plastic Mold
 
NX344 is a special grade which is developed by our Ningshing Special-Steel.
It is high quality level of 1.2344 ESR, a kind of hot work tool steel.
At the beginning, we develop this grade for making plastic mold for high-grade of snack box because of its better performance on thermal resistance and good toughness that could improve to get a longer lifetime of the mould.
 
Chemical Composition (%)

C	Si	Mn	P	S	Cr	Mo	V
0.36 0.42	0.90 1.20	0.30 0.50	≤ 0.015	≤ 0.003	5.00 5.50	1.25 1.50	0.90 1.20

 
Dimensions

Thickness (mm)	Width (mm)	Length (mm)
100-500	100-910	3000-5800

 
Delivery Condition
EAF+LF+VD+(ESR), Forged, Spheroidizing Annealed, EFS, Hardness≤230HB, Machined surface,
UT 100% SEP1921 Class 3 E/e,
 
Spheroidized Microstructure as per standard NADCA207-2003 AS1-AS9
 
Impact test: Transverse impact test as per ASTM A370,  V notch impact test (5 samples, size of 10 x 10 mm),
average value >=11 J (delete max. and min.), single value >=8 J
 
Forging Technique

Heat Temperature	Start Forging Temperature	Finish Forging Temperature	Cooling Method
1020-1150 °C	1100-1120 °C	900-850 °C	Pit or Sand Cooling

 
Heat Treatment
Annealing
750 to 800°C (1382 to 1472°F)
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr (50 to 68°F/hr) down to approx. 600°C (1112°F), further cooling in air.
Hardness after annealing: max. 235 HB.
           
Stress relieving
600 to 650°C (1112 to 1202°F)
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 1040°C (1832 to 1904°F)
Oil, salt bath (500 - 550°C / 932-1022°F), air
Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness:
52 - 56 HRC in oil or salt bath,
50 - 54 HRC in air.
 
Tempering
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. It is recommended to temper at least twice. A third tempering cycle for the purpose of stress relieving may be advantageous.
1st tempering approx. 30°C (86°F) above maximum secondary hardness.
2nd tempering to desired working hardness.
The tempering chart shows average tempered hardness values.
3rd for stress relieving at a temperature 30 - 50°C (86 to 122°F) be low highest tempering temperature.
 







4. Contact us

Shanghai Bozhong Metal Group Co., Ltd.

ADD: 5F, Building #32, No.518 Xinzhuan Rd, Songjiang District, Shanghai, P.R.China 201612 

Contact: Mr. Paik 

 

 

 
 
 

 

 

 

Website: https://shanghaibozhong.en.made-in-china.com