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AISI/SAE 4140 Carbon Steel Bar

4140 is a 1% chromium-molybdenum medium hardenability general-purpose high-strength steel, usually hardened and tempered in the tensile range of 850-1000 Mpa (condition T). 4140 now have improved machinability, which greatly increases feed and/or speed, while extending tool life without affecting mechanical properties. The prehardening and tempering 4140 can be further case hardened by flame or induction hardening and nitriding.

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Carbon Steel Bar

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Carbon Steel Bar

AISI/SAE 4140 Carbon Steel Bar Description

Product Parameters

Product Name	AISI/SAE 4140 Carbon Steel Bar
Standard	EN/DIN/JIS/ASTM/BS/ASME/AISI, etc.
Common Round Bar Specifications	3.0-50.8 mm, Over 50.8-300mm
Flat Steel Common Specifications	6.35x12.7mm, 6.35x25.4mm, 12.7x25.4mm
Hexagon Bar Common Specifications	AF5.8mm-17mm
Square Bar Common Specifications	AF2mm-14mm, AF6.35mm, 9.5mm, 12.7mm, 15.98mm, 19.0mm, 25.4mm
Length	1-6meters, Size Accept Custom
Diameter(mm)	Hot Rolling Round Bar	25-600	Cold Rolling Square Bar	6-50.8
	Hot Rolling Square Bar	21-54	Cold Rolling Hexagon Bar	9.5-65
	Cold Rolling Round bar	6-101.6	Forged Rebar	200-1000
Surface Process	Bright, Polished, Black
Other Services	Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

Chemical Composition

Grade	Mn	S	C	P	Si	Cr	Ni
AISI 4140	0.75-1.00	0.035	0.38-0.43	0.035	0.20-0.35	0.8-1.1	0.15-0.25

Mechanical Properties

Grade	Tensile Strength psi	Yield Strength psi	Elongation %	Hardness HRC
AISI 4140	100k	80k	20	18-22

Scope of Application

SAE 4140 are widely used in most industrial sectors, with a wide range of applications, such as: adapters, spindles, axles, bolts, crankshafts, connecting rods, chuck bodies, chucks, conveyor belt pins and rollers, ejection pins, forks, gears, Guide rods, hydraulic shafts and parts, lathe spindles, logging parts, milling spindles, motor shafts, nuts, clamping rods, various pins, pins, pump shafts, plungers, sleeve, spindle, sprocket, stud bolt, tool holder, torsion bar, worm, etc.

Factory appearance

The company strictly follows national quality standards and establishes a full-process quality control system. From the procurement of raw materials, the supplier qualification review and factory inspection are implemented. Precision CNC equipment and automated testing instruments are used in the production process to monitor the mechanical properties, chemical composition and surface treatment process of metal materials in real time to ensure that the products meet national standards.

Packing and delivery

The company has built a closed-loop service system of "pre-sales-sales-after-sales": free technical consultation and solution design are provided before sales to assist customers in accurate selection; during sales, visual tracking of the entire order process is implemented, and customers can query production progress and logistics dynamics in real time through exclusive accounts; after-sales guarantee policies are implemented, and quality issues are responded to and handled within 48 hours.

PRODUCT TESTING

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FAQ

Q: How can I get your quotation as soon as possible?

A: Email and fax will be checked within 24 hours, meanwhile, Skype, WeChat and WhatsApp will be online within 24 hours. Please send us your requirements and order information, specifications (steel grade, size, quantity, destination port), we will work out the best price as soon as possible.

Q: How do you guarantee your products?

A: Each product is produced by a certified workshop and inspected piece by piece by Lin Xu according to national QA/QC standards. We can also issue a warranty to customers to guarantee the quality.

Q: Do you accept third party inspection?

A:Yes, we absolutely accept.

Q: Will you deliver on time?

A: Yes, we promise to provide the best quality products and deliver on time. Honesty is the tenet of our company.

Q: Are you a trading company or manufacturer?

A: We are a very professional steel product trading company. We can also provide a variety of steel products.

Q: Will you deliver on time?

A: Yes, we promise to provide the best quality products and deliver on time. Honesty is the purpose of our company.

CUSTOMER VISIT

CUSTOMER TESTIMONIALS

Customer Reviews

No negative reviews since the cooperation! Whether it is galvanized steel plate or alloy steel, the quality is consistent. The team's service is considerate and they actively provide market suggestions. The cooperation process is easy and pleasant!

APPLICATION AREAS

Bridge Engineering

Automotive

Petrochemical

Power Industry

Aerospace

Agricultural machinery

CERTIFICATES

Carbon Steel Bar