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We offer steel and steel fabrication services

We are a first-class steel service center with industry-leading technology, offering a wide range of steel and processing services to our customers.

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AISI/SAE 4140 Alloy Steel Bar

AISI 4140 steel bar is made of a low alloy steel containing chromium, molybdenum and manganese. It has a high carbon content and a good balance of strength, toughness, wear resistance, impact resistance and heat treatment capabilities.

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AISI/SAE 4140 Alloy Steel Bar Description

4140 steel is a 1% chromium-molybdenum general-purpose high-strength steel, usually hardened and tempered in the tensile range of 850-1000 Mpa. 4140 steel has improved machinability, which greatly increases feed and 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. AISI4140 steel bars have high strength, hardenability, good toughness, small deformation during quenching, and high creep strength and durable strength at high temperatures.

Product Parameters

Product Name

AISI/SAE 4140 Alloy 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

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Industries We Proudly Service

Industries We Proudly Service

Building Construction
Specific requests for on-site construction are generally required and we will work with our clients to meet their needs.
Oil & Gas
We supply high strength steel to the oil and gas industry and our equipment is customized to cut advanced high strength steel for the oil and gas industry.
Medica Equipment
TISCO supplies hospital beds and related furniture applications that require low micro surface finishes for plating applications.
Spaceflight
Our high-quality steels and aircraft-grade metals also play an important role in specialty aerospace parts.
Agriculture
TISCO has been a proud supplier of steel to the agriculture and farming industry, and we understand the ups and downs that the industry has experienced.
Heavy Equipment
We also supply several exercise equipment manufacturers with special high surface quality and high strength applications.

Can I go to your factory to visit?

Of course, we welcome customers from all over the world to visit our factory.
Q : How long is your delivery time?
A : Our daily inventory is more than 6000 tons, so for common product size, just need 5-7 work days from stocks, ifthe special size from new production, delivery 15-21 days.
Q : Does the product have quality inspection before loading?
A : Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept third party inspection.
Q : Can you accept customization?
A : Yes. Can be customized according to customer requirements
Q : How do we trust your company?
A : We specialise in steel business for years as golden supplier on Alibaba, headquarter locates in Jinan, Shandong province, you are welcome to investigate in any ways, by all means, we have CE and ISO9001 certificate, quality can be guaranteed, the most important point is that we ship enough weight as per the order.
Q : What's your supported standard of products?
A : We can supply BG/T, ASTM;, EN/DIN,; JlS and other common standards products. Customers can name their requests and we can supply accordingly.