JIS G 4051
JIS G 4051
JIS G 4051
JIS G 4051
JIS G 4051

JIS G 4051

1. Chemical composition: Carbon content between 0.43 and 0.50%, manganese content between 0.60 and 0.90%, sulfur content not more than 0.050%, phosphorus content not more than 0.040%. 2. Bulk weight: approximately 7.85 g/cm ³. 3. Tensile strength: about 630 MPa. 4. Yield strength: about 375 MPa. 5. Elongation: about 14%. 6. Hardness: HRC 20-30. 7. Extensibility: about 40%.

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Product Introduction

JIS G 4051 is a Japanese industrial standard for carbon steel for machine structural use. This standard covers several grades of low-alloy steel and carbon steel bars, including S10C, S15C, S20C, S25C, S30C, S35C, S40C, S45C, S50C, S55C, and S60C. The steel bars are generally used for manufacturing various machine parts and tools, such as gears, crankshafts, axles, and bolts. JIS G 4051 specifies chemical composition, mechanical properties, and other technical requirements for each grade of steel.

Here are a few highlights of JIS G 4051 product specifications:

1. Chemical composition: specifies the chemical composition requirements of different grades of carbon structural steel, such as the content range of C, Si, Mn, P, S and other elements.

2. Mechanical properties: The mechanical properties of different grades of carbon structural steel are specified, such as tensile strength, yield strength, elongation, hardness, etc., to ensure that the product meets the required stress, durability and toughness.

3. Surface quality: specifies the surface quality requirements of carbon structural steel, such as appearance defects, surface finish, etc., to ensure that the product meets aesthetic standards and is easy to use.

4. Heat treatment: The heat treatment method of carbon structural steel is defined and the heat treatment curve is provided to ensure that the material can obtain the required strength, toughness and durability during processing.

5. Marking and packaging: the marking and packaging requirements of carbon structural steel are specified to ensure that products are correctly identified, packaged and transported for effective management and use.

Chemical Composition

Standard	Grade	C	Mn	P	S	Si
JIS G4051	S45C	0.42-0.48	0.60-0.90	0.03	0.035	0.15-0.35

JIS Steel S45C Common Available Shapes

JIS S45C Steel is a medium strength steel. Suitable for shafts studs, keys etc. Available as rolled or normalised. JIS S45C machinery steel are usually supplied as square bar, or round bar or flat. JIS Steel S45C is excelling in weldability & machinability , and S45C steels can be subjected to various heat treatments.

JIS S45C Grade Steel Equivalents

DIN C45, CK45, 1.1191
AISI 1045
EN-8 / BS 970-1955 080M40

Manufacturing Technique

JIS G 4051

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Worldwide Equivalents Of Grade S45C

AISI1045 S45C