SAE4320 DIN 1.5714 Special Alloy Case Hardening Steel

• Type: Alloy Steel Bar
• Standard: ASTM
• Composition: Ferrous Steel Scrap
• Technique: Forged
• Shape: Round, Square, Flat
• Surface Treatment: Black, Grinded, Peeled, Polished, Rough Turned
• Model NO.: 4320
• Special Use: Mold Steel
• Application: Structural Steel Bar
• Similar Grades: DIN 1.5714, 16nicr4, 637m17
• Size Range: Diameter: 20-480mm
• Quality Standard: ASTM-A29
• Delivery Condition: Annealed, Qunched and Tempered
• Surface Condition: Black, Grinded, Peeled, Polished
• Transport Package: Apply The Shipping Packing
• Specification: Diameter: 20-480mm
• Trademark: FUSHUN
• Origin: Hubei, Huangshi
• HS Code: 7228600000
• Production Capacity: 500tons Per Month

Product Description

Similar Grades:
16NiCr4, DIN1.5714, 637M17

Shape: 
Round, Flat, Square.

Size Range:
 

	Diameter(mm)	Thickness (mm)	Width (mm)	Length(mm)
Round	20-480	-	-	2000-5800
Square	20-480	-	-	2000-5800
flat	-	20-50	80-600	2000-5800

 
Steel-making Condition: 
EF, EF/EAF+LF+VD, EF/EAF+ESR

Delivery Condition:
Annealed , Quenched + Tempered

Surface Condition: 
Black, Grinded, Peeled, Rough turned, Polished

Features:
1.Competitive price
2.Immediate delivery
3.Premium quality
4.Reliable service
5.MOQ: 1 Ton
 
 

Packing details	In seaworthy packing, as your requirement.
Delivery details	within 30-50 days

 


Chemical Composition:

C	Mn	P	S	Si	Cr	Ni
0.13-0.19	0.70-1.00	<= 0.025	<=0.035	<=0.40	0.60-1.00	0.80-1.10

 

Mechanical Property 
 
Mechanical Properties(values obtained on test blanks after core hardening + stress-relieving)
Test Blanks Diameter(mm) :11mm  30mm
Tensile Strength (Mpa) :1080-1470  830-1130
Yield Strength (Mpa) : 835 min  590 min
Elongation (longitudinal) (%) : 9 min  10 min
Impact 20°C (J) : 30 min  32.5 min
Hardness (HB) :327-417  249-339
 

Heat Treatment and Hot Plastic Deformation Temperatures
 
Process      Temperature° C         Cooling Medium
Hot Forming   900-1150                    air
Normalizing   870 min                        air
Soft Annealing   700 min                    air 217HB max
Carburising       870-950                     /
Core hardening    840-880                 oil-polymer salt bath
Carbonitriding    750-930                    gas
Isothermal annealing  860 min         cooling to 650, then air (HB 166-217)
Case hardening 810-840                 oil-polymer salt bath
Tempering        150-200                   /