Stronger Steel Through the Right Direction - Hung Shuh Stands with You

After rolling, however, the internal grains of the steel align along the rolling direction, creating a distinct “grain flow effect.” 

This structural orientation greatly influences both processing and product performance.

Generally, the mechanical properties are stronger along the grain direction than across it, particularly in terms of tensile strength and ductility. When the main stress direction of a product follows the grain, its fatigue life and impact resistance are improved. Conversely, if the load is applied perpendicular to the grain without proper design consideration, cracks, brittle fractures, or fatigue failure may occur especially at stress-concentrated areas such as cutting edges or bent sections.

Grain flow also affects processability.
Because of its high hardness, high-carbon steel is more sensitive during bending, stamping, or forming.
If processing runs against the grain, cracking, poor formability, or reduced product yield can result.
After heat treatment, misaligned grain flow and stress distribution may further cause warping, uneven hardening,
or even surface cracking.

Controlling grain flow ensures every product’s durability.
That is why it is essential to clearly indicate grain directionduring the design stage,
and to align it properly throughout bending, heat treatment, and assembly. 
This is the key to maximizing material performance and ensuring product stability and safety.