ThePipingMart Blog Grades Strenx 650 MC – Composition, Properties and Uses

Strenx 650 MC – Composition, Properties and Uses

Strenx 650 MC

Steel is a fundamental component of many industrial and manufacturing processes, and as such, the demand for high-quality steel has been steadily increasing. Strenx 650 MC is a steel product that has grabbed attention due to its numerous beneficial properties. Developed by SSAB, a leading global steel manufacturer, Strenx 650 MC is renowned for its durability, strength, and versatility. In this blog post, we will delve into the important aspects of the Strenx 650 MC to help you understand its properties and applications.

What is Strenx 650 MC?

Strenx 650 MC is an advanced high-strength structural steel designed to provide higher yield strength and improved formability compared to common structural steel. It offers excellent weldability, assured toughness, good surface quality and dimensional accuracy, making it an ideal choice for heavy or larger components requiring enhanced fatigue life.

Strenx 650 MC Composition

Strenx 650 MC is a thermomechanically-rolled steel with a specific chemical composition that boosts its mechanical properties. It mainly comprises low carbon, manganese, and silicon, with trace elements such as boron, vanadium, and chromium. This compositional makeup, combined with SSAB’s advanced processing techniques, produces steel with excellent strength and wear resistance.

(MAX %)
(MAX %)
(MAX %)
(MAX %)
(MAX %)
(MIN %)
(MAX %)
(MAX %)
(MAX %)
0.12 0.21 1) 2.00 0.025 0.010 0.015 0.09 2) 0.20 2) 0.15 2)

Strenx 650 MC Mechanical Properties

Strenx 650 MC offers high strength, toughness and excellent bending and forming properties. The tensile strength of this steel grade is at least 650 Megapascal (MPa), while its yield strength is around 650 MPa. This strength is due to its microstructure, which consists of a martensitic phase, ferrite, and bainite. This steel’s mechanical properties are ideal for heavy-duty structures such as truck chassis, cranes, and mining equipment.

(MIN %)
(MIN %)
2.00 – 3.00 650 700 – 850 12 14 0.8 x t
3.01 – 6.00 650 700 – 850 14 1.2 x t
6.01 – 10.00 650 700 – 850 14 1.5 x t

Strenx 650 MC Physical Properties

Strenx 650 MC boasts excellent toughness, impact strength, and weldability. Also, it is non-combustible, non-absorbent, and immune to rust, rot, and pests. These physical properties make it a popular material for various industries, including construction, mining, and offshore engineering.

Strenx 650 MC Uses

The high performance and durability of Strenx 650 MC make it ideal for use in various applications. Its high strength and toughness allow it to withstand heavy loads without deformation or fracture. It produces heavy load-bearing structures like truck chassis, trailers, cranes, and mining equipment.

Strenx 650 MC Corrosion Resistance

Strenx 650 MC offers excellent resistance to corrosion and oxidation when compared to other steels of similar strength. This makes it ideal for harsh environments like marine and offshore structures. It is also resistant to stress corrosion cracking, a common problem in marine environments.

Strenx 650 MC Heat Treatment

Strenx 650 MC is supplied with heavily rolled plates requiring a post-weld heat treatment for stress relief. The heat treatment ensures uniform microstructures throughout the material, which increases the steel’s strength and durability.

Strenx 650 MC Machining

Strenx 650 MC may be challenging to machine due to its high strength, but it can be machined using standard techniques with the aid of advanced tools. Proper machining techniques reduce the risk of tool wear and increase efficiency.

Strenx 650 MC Welding

Strenx 650 MC is a weldable steel that can join gas, laser and resistance welding methods. The weldability of this steel is due to its low carbon content and soft weld interface. It is crucial to follow appropriate welding procedures to avoid any degradation of the steel’s mechanical properties.


Strenx 650 MC is a high-strength steel with numerous beneficial properties and is ideal for heavy-duty structures. Its chemical composition and microstructure, combined with SSAB’s advanced processes, result in superior strength and durability of steel. It exhibits excellent resistance to corrosion and oxidation, making it suitable for use in harsh environments. It is important to take note of the proper heat treatment, machining, and welding techniques when working with this steel. Overall, Strenx 650 MC is an exceptional steel product that has become an attractive option for manufacturers and engineers globally.

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