SAE4320 637m17 DIN 1.5714 Special Alloy Case Hardening Steels

• Type: Round
• Standard: AISI, BS
• Composition: Ferrous Steel Scrap
• Technique: Hot Rolled
• Shape: Round, Flat or Square
• Surface Treatment: Polished
• Model NO.: SAE4320 637M17 DIN1.5714 16NiCr4
• Special Use: Alloy Structural Steel
• Application: Structural Steel Bar
• Size Range: Round Bar:Dia12~420mm Flat Bar:2~420 X 30~1500mm
• Similar Grade: 1.4542 Uns S17400 630 17-4pH
• Delivery Condition: Hot Rolled, Forged, Annealed, Quenched and Tempered
• MOQ: 500kgs
• Transport Package: Seaworth Packing
• Specification: Round Bar: Dia12~420mm Flat Bar: 2~420 X 30~1500mm
• Trademark: FUSHUN
• Origin: Huangshi, Hubei
• HS Code: 7228600000
• Production Capacity: 5000tons/Year

Product Description

Similar Grade:
 

DIN	Material No.	AFNOR	SAE	BS
16NiCr4	1.5714	16NC6	4320	637M17

Quality Standard:
BS EN 10084 2008 Case hardening steels

Chemical Composition(%)

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

Mechanical Properties(values obtained on test blanks after core hardening + stress-relieving)

Test Blanks Diameter(mm)	Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (longitudinal) (%)	Impact 20°C(J)	Hardness (HB)
11mm	1080-1470	835 min	9 min	30 min	327-417
30mm	830-1130	590 min	10 min	32.5 min	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	/

Applications
Alloyed case hardening steel for parts with a required core tensile strength of 1000 - 1300 N/mm² and good wearing resistance as boxes, piston bolts, spindles, camshafts, gears, shafts and other mechanical controlling parts.