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Introduction

S45C carbon steel bars are classified as medium-carbon steel. They are frequently used in the manufacture of structural components requiring exceptional durability and performance, such as shafts, gears, and bolts.

Advantage

Cost-Effective

S45C offers high strength (700-850 MPa tensile strength) at a lower cost compared to alloy steels.

Good Machinability

Easy to machine with excellent turning and milling properties.

Versatile in Form

Supplied as round, square, flat, or other bar shapes.

Specification

Item	Specification / Range
Standard	JIS G 4051, Equivalent to AISI 1045
Typical Diameter (Round Bar)	10mm ~ 300mm
Typical Length	3m ~ 6m (or as required)
Supply Condition	Hot-rolled, Black, Bright turned, Normalized, Q&T (Quenched & Tempered)
Tensile Strength	700 - 850 MPa
Yield Strength	≥ 450 MPa
Elongation	≥ 15%

Typical chemical composition(wt%)

C	Si	Mn	P	S
0.42 - 0.48	0.15 - 0.35	0.60 - 0.90	≤ 0.030	≤ 0.035

Applications

Auto Manufacturing

General Machinery & Equipment

Molds and Dies

Farm and Building Machines

Customization Services

Customizable Item	Options
Diameter & Shape	Round, square, flat, or hex; non-standard sizes available
Length / Cut	Standard or cut-to-length as required
Heat Treatment	Normalized, annealed, or quenched & tempered for desired hardness
Surface Finish	Hot-rolled, bright turned, ground, or peeled
Packaging	Bundles or wooden boxes for safe delivery
Documentation	Material Test Certificates (MTC) and batch traceability

Our Strength

Reliable Quality

ISO-certified processes and partnerships with leading steel mills guarantee consistent material quality.

Large Inventory

An extensive stock of plates, pipes, and rods enables fast order fulfillment.

Custom Processing & OEM

Advanced machining centers provide cutting, bending, CNC machining, welding, and branding in accordance with customer specifications.

Rapid Customer Response

Professional 24/7 service ensures quick responses to technical and logistics inquiries.

Our certificates

Feedback

We maintain active communication with clients, providing technical feedback and adjusting production based on project requirements to ensure accurate and timely delivery.

Q195 Carbon Steel Coil

FAQ

Q: What industries commonly use S45C Carbon Steel Bar?

A: It is widely used in automotive, machinery, tooling, and construction equipment for shafts, gears, bolts, and other mechanical components.

Q: Can S45C bars be heat-treated?

A: Yes, they can be normalized, annealed, or quenched & tempered to achieve the desired hardness and strength for different applications.

Q: Are custom sizes available?

A: Yes, diameter, length, and bar shape can be customized to match your project requirements.

Q: How long does it usually take to get an order?

A: If we have the size and type you want sitting around, we can ship it in about a week or ten days. If you want something big, custom, or with special heat treatments, we'll give you a better estimate once we know what you're looking for.

Q: How is surface finish customized?

A: S45C bars can be supplied hot-rolled, bright turned, ground, or peeled, depending on your application needs.

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S45C Carbon Steel Bar