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Mild Steel S235JR

mild-steel-cnc-part(1)

Material Type

Metal

Material Name

Mild Steel S235JR

Alternative Names

1.0038 | Fe 360 B

Process Compatibility

CNC Milling, CNC Turning

introduction

Mild Steel S235JR in CNC Machining

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Mild Steel S235JR is a low-carbon structural steel with good weldability and machinability.

S235JR typically contains low carbon, manganese, phosphorus, sulfur, and trace amounts of other elements. In CNC machining S235JR, we use carbide or high-speed steel tools for turning, milling, and drilling. We maintain proper speeds, feeds, and coolant for good results. It's weldable, but post-weld machining may be necessary for certain applications. S235JR is commonly used in various construction and structural applications, such as buildings, bridges, and machinery.

"S'' stands for structural steel. The numerical component "235" represents its minimum yield strength in megapascals (MPa), indicating the amount of stress the material can withstand before deformation. Additionally, the "JR" signifies that the steel has undergone a Charpy V-notch impact test at room temperature, ensuring a specified level of impact resistance.

Properties

Properties Table of Mild Steel S235JR

MECHANICAL PROPERTIES
Ultimate Tensile Strength  340-470 MPa
Yield Strength 170-340 MPa
Young's Modulus(Elasticity)  200 GPa
Elongation at Break 23-28%
Physical Properties
Corrosion Resistance Poor
Magnetism Generally non-magnetic
UV Resistance Limited UV resistance
Weldability Good weldability with proper procedures
Thermal Properties
Maximum Service Temperature Approximately 200°C(392°F)
Thermal Expansion Coefficient 12.2 x 10^-6/°C(20-100°C)
Thermal Conductivity 25 W/(m·°C)

TECHNOLOGY OVERVIEW

Basic Knowledge of Mild Steel S235JR

What is Mild Steel S235JR?

S235JR (1.0038 steel) is a European standard hot rolled non-alloy structural steel with good plasticity, toughness, and weldability.

The material has various delivery conditions like +AR (as-rolled), +N (normalized), +M (thermomechanically formed), +C (cold work hardened), +A (soft annealed), and +AT (solution annealed).

Advantages of Mild Steel S235JR

Excellent weldability

Highly formable

Versatility

Affordable

Moderate Strength

Widely available

Applications of Mild Steel S235JR

Structural beams and columns

Automotive chassis components

Sheet metal for construction

General machinery parts

Bridges and infrastructure

Railway tracks and components

 

FAQ

Mild Steel S235JR Buying FAQs

S235 and S355 are both structural steels, but the main difference lies in their yield strength. S235 has a minimum yield strength of 235 MPa, while S355 has a minimum yield strength of 355 MPa. Additionally, S355 steel is stronger and more rigid than S235 steel due to a higher carbon proportion.
Generally, S235 steel is more affordable because it has lower yield strength, and also it is easier to obtain than S355.
S235JR and A36 are similar in terms of mechanical properties, but they may have differences in chemical composition and specific applications. S235JR is a European standard steel, while A36 is an American standard.

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