ST41/SS400/AISI 1018
ST41 mild/low carbon steel has excellent weldability and produces a uniform and harder case and it is considered as the best steel for carburized parts. ST41 mild/low carbon steel offers a good balance of toughness, strength and ductility. Provided with higher mechanical properties, ST41 hot rolled steel also includes improved machining characteristics and Brinell hardness.
Specific manufacturing controls are used for surface preparation, chemical composition, rolling and heating processes. All these processes develop a supreme quality product that are suited to fabrication processes such as welding, forging, drilling, machining, cold drawing and heat treating.

Composition(%)
C 0.13-0.18
Si 0.15-0.35
Mn 0.5-0.7
P/S 0.050 Max
Fe 98.81-99.26%
Mo –
Hardness
Annealed 116-152 HB
Tempered –
Size Availability
Round Bar:
5mm – 3 inch
As Besi Segi Empat (Square Bars/Vierkant):
6mm-80mm
As Segi Enam (Hexagonal Bar):
Size 8mm-65mm
Equivalent
ST41, SS400, AISI 1018, DIN 17100, ST 44-2, ASTM A36, ASTM A283 Grade D, EN S275/ BS 43A, JIS 3101