Structural Steel Plate, Beams, Columns, Channels, Angles – S275, S355

S275 and S355, Structural Steel Plates, Columns, Beams, Angles, and Channels

S275 – a structural grade steel with a minimum yield strength of 275 N/mm²
S355 – a structural grade steel with a minimum yield strength of 355 N/mm²

S275 and S355 are two types of steel grades that can be used for a variety of structural and engineering purposes. They differ in strength and may be used for separate purposes because of their unique qualities and chemical composition. They can be ordered in a variety of different forms like bars, plates, or blocks that makes them pliable for the task at hand.

What is S275

This is a structural grade steel that can yield a minimum of 275 N/mm2. This grade of steel, along with S275JR, is useful for many general engineering and structural jobs and comes in a variety of forms, such as a plate, flat bar, and even a round bar. Though this grade isn’t as strong of a steel as S355, it functions as a great welding metal and has good machinability. If request our company is able to flame cut a profile into a sheet of S275.

S275 suitable for numerous general engineering and structural applications

S275 & S275JR steel can be supplied in many forms including plate, round bar and flat bar. S275 gives a lower strength (than S355) but has good machinability and can also be welded. The average minimum yield for S275 steel is 275 N/mm². That is why it is called S275.

BS EN 10025 S355, S355JR, S355J2 and S355J2+N supercedes BS4360 50A, 50B, 50C 50D.

Typical chemical composition of S275

C	SI	MN	S	P
0.25 max	0.50 max	1.60 max	0.05 max	0.04 max

What is S355

This grade of steel is stronger than its S275 counterpart with a minimum yield strength of 355 N/mm2 resulting in its S355 name. This grade is also available in plate, round bar, flat bar, and is even available in blocks. S355 is low in carbon option, however, has more SI in its composition. This creates a highly durable steel that is used in harsh environments that are susceptible to frequent weather changes like on offshore structural sites. And like S275, this grade can also be flame cut into a profile upon request.

S355, S355JR, S355J2, S355J2+N steel in plate, round bar, flat bar and blocks. S355 steel is a low carbon steel whose specifications offer high yield strength. The average minimum yield for S355 steel is 355 N/mm² giving its name: S355.

BS EN 10025 S275 & S275JR supercedes BS4360 43A and 43B.

Typical chemical composition of S355

C	SI	MN	S	P
0.20 max	0.55 max	1.60 max	0.025 max	0.025 max

S355 sheet/plate can also be flame cut to a profile on request.

Sizes and Forms

In width, the S355 and S275 rolled sheet and plate can go up to 2000 mm, however, they have a thickness ranging from 1.5 to 25 mm for any heavy-duty job they are needed for. The forms they come in can vary from sheets and plates, round bar and flat bars and even blocks. So, depending on the strength of steel needed and the job it’s intended for, there’s a versatile mix of shapes and sizes that are readily available. Contact us for our structural steel stock and nationwide delivery.

mm	mm	mm	mm	mm	mm
2000	1000	2500	1250	3000	1500
4000	2000

Also available in blocks – please call for details.