• Commodity：SAE 4140 Steel Round Bar
• Heat Treatment：Quenched and Tempered
• Delivery Condition：Hot Rolled or Cold Drawn or Qt
• Steel Grades：4140 En19 Scm440 42CrMo4
• Transport Package：Anti-Rusty Package
• Specification：M12-M100
• Origin：China
• HS Code：7228309000
• Production Capacity：3000tons,Month

Basic Info.

Commodity SAE 4140 Steel Round Bar Heat Treatment Quenched and Tempered Delivery Condition Hot Rolled or Cold Drawn or Qt Steel Grades 4140 En19 Scm440 42CrMo4 Transport Package Anti-Rusty Package Specification M12-M100 Origin China HS Code 7228309000 Production Capacity 3000tons/Month

Product Description

AISI 4140 / SAE 4140 Alloy Steel Round Bar
 sae 4140 steel price per ton /  sae 4140 steel rod price  /  sae 4140 steel bar price / sae 4140 alloy steel price list / price of steel / price of steel bar
 
sae4140 steel is a low-alloy iron steel containing chromium and molybdenum as strengthening elector.
sae 4140 material we supply includes hot rolled steel bar/steel rod such as steel round bar, steel square bar, hexagonal steel bar and forged steel bar.
 
 1. CHEMICAL COMPOSITION:

SAE	C	SI	MN	S	P	Cr	Mo
4140	0.48-0.53	0.15 - 0.35	0.70-1.00	0.035  (max)	0.035  (max)	0.80-1.10	0.15-0.25

2. ADVANTAGES:
sae 4140 steel is a versatile alloy steel with good atomspheric corrosion resistantance and reasonable strength. It shows good overal combination of strength, toughness, wear resistance and fatigue strength.   
 
3.. APPLICATION: sae 4140 steel is used as forgings in the aerospace and oil and gas industries, and has myriad uses in the automotive, agricultual and defense industries. Typical usages are forged gears, shafts and spindles, fixtures, jigs, collars.
 
4. PRODUCTION LINE: Blast Furnace Melton Iron → EAF(EBT/BOV) → LF → VD → Molten Steel → Continuous Casting → Hot Rolling/Forged → Heat Treatment → Further Processing(Peeling/Turning)
  
5. DELIVERY CONDITION AND DIMENSION:

Hot rolled round bars	16mm to 200mm
Cold drawn bars	6mm to 100mm
Forged bars	200mm to 800mm

6. DIMENSIONAL TOLERANCES:
1): sae 4140 steel hot rolled alloy steel round bars tolerance:

DIA	7-20	20-30	30-50	50-80	80-110	110-150	150-190	190-250
MM	+0.35 -0.35	+0.40 -0.40	+0.50 -0.50	+0.70 -0.70	+1.0 -1.0	+1.3 -1.3	+2.0 -2.0	+2.5 -2.5

2): sae 4140 steel cold drawn alloy steel bars size tolerance: H9, h10, h11  
 
3): sae 4140 steel  forged  bars  tolerance:  +/-5mm  for  black  surface  and +/-3mm  after  peeled/rough turned.
 
7. GAS CONTENT:

Oxygen	Nitrogen	Hydrogen
20ppm(max)	90ppm(max)	2ppm(max)

 
8. INCLUSION RATING:
 

	A	B	C	D
	MAX	MAX	MAX	MAX
Thin	2.0	2.0	2.0	2.0
Thick	1.0	1.0	1.0	1.0

9. GRAIN SIZE: 5 to 8
 
10.LENGTH: The ends will be saw cut. The ends will be free from burrs and slag lumps. Length can be customized according to customers' demands.
 
11. STRAIGHTNESS: 3mm/m(max) for hot rolled bars and 2mm/m(max) for cold drawn bars
 
12. PROCESSING:
 
Surface Treatment: Peeling, Turning, Grinding, Milling, Drilling, Boring
 
Heat Treatment: Normalizing, Annealing, Quenching+ Tempering
 
13. MARKING: Material, Dimension, Heat No.
 
14. QUALITY TEST: Spectral Tested, Microstructure Tested, Macrostructure Test,  Hardness Test, Upsetting Test
 
15. PACKING:
1): The goods will be packed by wire rods or iron strips, 2 to 3mt each bundle
2): Tow or three tags will be attached on each bundles with steel grade, specification, heat no. Diameter
3): For further processing products such as cold drawn, peeled or heat treated goods, plastic bags wrapped or pallet loading is available according to customers' demands.
 
sae 4140 steel hot rolled round bars: 

sae 4140 steel cold drawn bars: 

sae 4140 steel peeled bright bars: 

sae 4140 steel forged bars: 

sae 4140 steel forged bright bars: 

 
China professional steel manufacturer, China steel supplier, China steel processor, China steel exporter. We have several cooperative steel mills and further processing mills. We are China professional steel manufacturer, steel supplier, steel processor and steel exporter.Our major products are steel round, square and flat bars as well as steel plates, wire rods , steel pipes and steel forgings.