API 5CT AISI 4140 L80 Qt Steel Solid Round Bars / 4140 L80 Quenched Tempered Round Steel Bar

• Customization: Available
• Type: Alloy Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Model NO.: AISI 4140 L80
• Technique: Forged/Hot Rolled/Cold Drawn
• Shape: Round/Flat/Block/Square/Bar/Plate
• Surface Treatment: Polished
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Structural Steel Bar
• Certificate: ISO, ABS, BV, CCS, Dnv, Lr, Gl, Mill Certificate
• Quality Inspection: Ut, Chemical Composition, Physical Properties/SGS
• Length: 3-5.8m, or as Per Request
• Heat Treatment: Quenched,Tempered,Annealed
• Surface Require: Black,Grinding,Bright,Polish
• Transport Package: Seaworthy Packing/Wooden Box or at Client′s Requir
• Specification: Customized
• Trademark: OEM & ODM
• Origin: China
• HS Code: 722840
• Production Capacity: 1000 Ton/Month

Product Description

Product Description

AISI 4140 L80 Alloy Steel
AISI 4140 80K, PSL 3, API 5CT Standards, NACE MR0175:2015 

Chemical Composition

Grade	C	Mn	Cr	Mo	Si	P	S	Ni	Cu	V	H max. ppm
Min.	0.380	0.750	0.800	0.150	0.150	-	-	-	-	-	-
Max.	0.430	1.000	1.100	0.250	0.350	0.025	0.025	0.250	0.300	0.300	2.000

 

Heat Treatment

Austenizing temperature	Time	Tempering temperature	Time
1600 ±25ºF (871 ±14ºC)	Min. 60 minutes	1250 ±50ºF (677 ±27ºC)	Min. 60 minutes

Oil or Polymer or Water. For Water Quenching, the temperature of water shall not exceed 38ºC (100ºF) at start of quench. For bath-type quenching, the temperature of water shall not exceed 49ºC(120ºF) at any time during the quench cycle.

Mechanical Properties
as per ASTM A370 -20

 

Yield strength	Tensile strength minimum	Elongation in 2" (minimum)	Reduction Area  (minimum)
Min. 80,000 psi (552 MPa) Max. 95,000 psi (655 MPa)	100,000 psi (690 MPa)	18%	35%

 
Inspection

1. Specimen test location & QTC
2. Charpy V-notch impact at 21ºC / -32ºC / -60ºC
3. Hardness as per ASTM E10-18: On surface / 1" below surface
4. Volumetric NDE 100% - Ultrasonic
5. Minimum hot work reduction ratio 4.0 to 1
6. Grain size should be #S or Finer as per ASTM E112 - 13
7. Surface inspection

Size	Round	Dia 10-500mm
	Plate/Flat/Block	Thickness 5mm-200mm
		Width 100mm-2500mm
Heat treatment	As rolled, Normalized.Annealed, Q+T
Surface condition	Black; Machined;
Delivery condition	Forged; Hot rolled; Cold drawn
Test	Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness
Payment terms	T/T;L/C;/Money gram/ Paypal
Trade terms	FOB; CIF; C&F; etc..
Delivery time	30-45 days
Application	Its most common applications are for stubs, gears, shafts for the wind industry, crankshafts, rims, reducers, automobile gear boxes and pieces for industrial and agricultural vehicles.

 

Main Products

 

Alloy Steel	4140,4142,42CrMo4,1.7225,SCM440,4130,SCM430,25CrMo4,1.7218,34CrNiMo6, 1.6582,4340,SNCM439,36CrNiMo4,1.6511,SACN645,1340,SMn438,SNC236,
Tool Steel	H13,1.2344,SKD61,D2,SKD11,1.2379,1.2510,01,SKS3,95MnWCr5,D3,SKD1,1.2419, SKS31,H21,SKD5,1.2581,P20,35CrMo7,1.2738,1.2316,M2
Bearing Steel	GCr15,52100,SUJ1,SUJ2,100Cr6,1.2067,55C,8620,4320,9310,440C,M50
Spring Steel	9260,SUP6,SUP7,1.7108,54SiCr6,1.7102,5155,SUP9,1.7176,5160,1.7177,6150, SUP10,51CrV4,1.8159
Stainless Steel	321,sus321,1.4541,304,SUS304,1.4301,410,SUS410,1.4006,420,1.4021,1.4028, 434,1.4113,316L,SUS316L,1.4435,630,1.4542,431,1.4057

Detailed Photos

 

Company Profile

Equipment and Process

Application

Packaging