Comparison of Steel Plate Equivalent Grades

Steel Plate Equivalent Grades

Comparison of steel grades

Steels is a high-strength module that is designed to possess superior strength and excellent tolerances. Steels is categorized into four groups namely carbon, alloy, tool, and stainless grade. 

  • A carbon grade is designed with a higher content of carbon which can corrode or rust when exposed to moisture. 
  • Stainless has a higher content of chromium which gives its superior corrosion resistance properties. These components have enhanced strength and may be slightly difficult to weld due to their unique composition.
  • A tool steels grade has a higher content of carbon and is tailored for specific applications. These steels grades exhibit good machinability, hardenability and may be prone to corrosion in stress-induced setups.
  • Alloy steels is composed of alloying elements of less than 8% or higher than 8%. These components can be classified as low or high alloy steel. The content embedded in both these modules gives the alloy grades distinct hardness and resistance against wear, tear, and corrosive media.


Steel Plate Equivalent Grades

plates are high-strength modules that are designed with specific strength and tolerances. These plates are used in several domestic, commercial, and industrial applications. Each application has its set of requirements and necessities. In certain cases, the prescribed material may not be readily available, so the equivalent grade is used in these applications. Some equivalent grades can be produced with the same composition but have a different names in different countries.


Steel Grade Equivalents Table

The steels grade equivalent table covers steel grade that is similar to each other. This table covers piping components of different standards and sizes that can be used interchangeably with different applications.


Steel Grade Equivalents Guide

The grade equivalent guide specifies guidelines and steps necessary while using steel equivalent material. Some applications require components that can hold high pressures and temperatures, so a grade that can sustain such pressures should be used as an equivalent material. All the details and derivations of this are mentioned in the guide. 

Steel Plate Grade


International Standards Comparison

An international standard is a document that is developed via a consensus amongst experts from several countries. These standards are published globally and recognized by several governing bodies. Some standards may have the same chemical content and physical properties but may be known by other names. Similarly, some grades may exhibit slightly higher strength and tolerance as compared to their equivalent grade in another country.


Steel Plate equivalent ASTM Material

ASTM material is manufactured in accordance to the American Society for Testing and Materials. The plates of the ASTM standards are accepted worldwide for different applications. The grades of ASTM have unique properties that set them apart from the rest. In certain applications, the A53 grade B that is used in structural applications can be easily replaced by the seamless A106 grade B pipes. For a high temperature and pressure setup, the SS 321 grade can be used to provide stability to the grade.


Steel Plate Equivalent Steel Standard

plates are stocked in widths of 36, 48, and 60 with lengths of 96, 120, and 144. These plates are classified based on certain standards and grades. Certain components within a grade may be well suited for specific temperatures and pressures, but in some cases, the module might not be found or may be costly, or using it is not mandatory. At this time, equivalent material grades are used. These material types have near-identical characteristics to the main grade and can be easily replaced with it.


International Equivalent Grade For Steel Plates

International equivalent grades are commonly used grading patterns for each country. The Indian standard of steel grades specifies carbon steel qualities in the IS 2062 and SALIMA grade, with the USA having the ASTM standard. In Europe, the EN standard is followed, and Germany has the ST and DIN standard. France produces steel in the AFNOR grade, with China having the GB standard and Japan having the JIS standard. These specifications cover some of the most common grades that are produced across the globe.

Comparison of Steel Plate Equivalent Grades


Steels for pressure vessel construction

Pressure vessels and boilers are used in storing or processing volatile gases and fluids. This is why these vessels have to be constructed with the best material to prevent them from exploding under extreme strain and pressures. These vessels are usually designed in spherical or cylindrical shapes and have superior strength and tolerance. The pressure vessel grades are usually designed in carbon or stainless configurations. 

Pressure vessel grades work well in a wide range of chemical and energy sectors. They are generally designed in these main configurations. From the ASTM standards, the ASTM A285, A516, A537, A553 type 1, 2, and A353 grades are used in producing pressure vessels. In the ASME standards grades SA516, SA537, A353, SA353, and SA553 types 1 and 2 are specified. Apart from this, the EN 10028, BS 1501, and DIN 17155 grades are preferred in producing pressure vessel grades.

Steels for pressure vessel construction


Steels for construction

it is known for its superior strength, durability and is an integral part of the construction industry. These grades have enhanced tensile strength that allows them to provide good structural integrity and support to different applications. Construction grade can be classified into light gauge , structural, mild and rebar steels. The 4 types of grades are designed in stainless, carbon, alloy, and tool steels configurations. These components can be shaped in the form of ribbed bars, angle, channel sections, TMT bars, round, square bars, and so on to suit different requirements of the construction industry.

non-alloy structural steels for steel construction    
standard Current grade Previous standard Previous grade Current
BS EN 10025-2 40 B, A BS 4360 S 235 JR
40 C S 235 J0
43 C S 275 J0
40 D S 235 J2+N
50 B, A S 355 JR
43 B, A S 275 JR
43 D S 275 J2 +N
50 C S 355 J0
50 D S 355 J2 +N
DIN EN 10025-2 St 33 DIN 17100 S 185
50 D D S 355 K2 +N
RSt 37-2 S 235 JR
St 37-2 S 235 JR
RQSt 37-2 S 235 JRC
QSt 37-3 S 235 J2C +N
St 37-3 S 235 J2 +N
QSt 44-2 S 275 JRC
QSt 44-3 S 275 J2C +N
St 44-2 S 275 JR
St 52-3 S 355 J2 +N
St 44-3 S 275 J2 +N
QSt 52-3 S 355 J2C +N
St 50-2 E 295
St 60-2 E 335
NBN EN 10025-2 AE 235 B, A NBN A21101 S 235 JR
St 70-2 E 360
AE 235 D S 235 J2 +N
AE 235 C S 235 J0
AE 355 C S 355 J0
AE 355 D, DD S 355 K2 +N
AE 355 B S 355 JR
E 24-2 (NE) S235 JR
NF EN 10025-2 A 33 NF A35501 S 185
A 50-2 E 295
A 60-2 E 335
E 24-4 S 235 J2 +N
E 24-3 S 235 J0
E 28-4 S 275 J2 +N
E 28-2 S 275 JR
E 28-3 S 275 J0
E 36-4 S 355 K2 +N
E 36-3 S 355 J2 +N
  A 70-2 E 360


Steels for quenching and tempering

Modern steel manufacturing systems have advanced in the past years, and there is a requirement of more cleaner, leaner, workable, and stronger grades of steels than before. Today quenched and tempered steel is available having enhanced strength and superior hardening capacity. In these processes, the steel is heated at extreme temperatures and cooled to give them these attributes. Temper quenched modules are less brittle and ductile while showcasing superior resistance to wear and abrasion. This is why they are seen in different machinery and structures where the requirement for high strength is necessary. These steels come in different sizes and shapes to suit different requirements. The quenching and tempering process can be induced on almost all grades of steel.

quenching and tempering steels
standard Current grade Previous standard Previous steel grade Current
DIN EN 10083-3 25 CrMo 4 (N), … , 50 CrMo 4 (N) DIN 17200 25 CrMo 4 , … , 50 CrMo 4
NF EN 10083-1 25 CD 4S NF A35554 25 CrMo 4
50 CrV 4 (N) 50 CrV 4
non-alloy steels for case-hardening
standard Current steel grade Previous standard Previous steel grade Current
NF EN 10084 XC 10 NF A35554 C10E +N
DIN EN 10084 Ck 10 N,C 10 N DIN 17210 C10E +N
Ck 15 N, C 15 N C15E +N
Ck 10 U,C 10 U C10E +U
Ck 15 U, C 15 U C15E +U


Steels for case-hardening

Case hardening steel is designed with a lower carbon content between 0.10 to 0.30%. The steel has a tough core and a hard case that provides wear resistance along with enhancing fatigue strength at the surface. One of the key benefits of case hardened steel is that it provides outstanding durability to a wide spectrum of steel. They are resistant to wear due to the superior hardness of the grade. Case hardened steel is standardized based on the DIN EN 1SO 863-3 and DIN EN 10132 part 2 grade. These components are supplied in hot or cold rolled specifications and can be availed in pickled and unpickled conditions. The case-hardened steel is utilized in automotive engineering, mechanical, and plant engineering applications.

case-hardening Steels
standard Current steel grade Previous standard Previous steel grade Current
DIN EN 10084 20 MnCr 5 (N),16 MnCr 5 (N) DIN 17210 20 MnCr (+N),16 MnCr 5(+N)


Steels for offshore structures

Steel for offshore structures is predominantly built for drilling oil and underwater deposits from the sea bed. These structures are very strong and protect the material against strong tides and winds. The offshore components are seen in use at great depths in Arctic regions, where they are seen in low-temperature setups.

The most common characteristics of offshore steel are that it has a higher yield strength and offers excellent weldability. The steel also has good internal soundness with good resistance against longitudinal and transverse brittle fracture. The low phosphorous and sulfur content in these structures give them high resistance against lamellar tearing. The most common structural steel grades are the S355G7+M/+N, S355G8+M/+N, S355G9+M/+N, S355G10+M/+N, S420G1+Q/+M, S420G2+Q/+M, S460G1+Q/+M, S460G12+Q/+M, API 2H grade 50 and API 2W grade 50.

offshore structures Steels
standard Current steel grade Previous standard Previous steel grade Current
BS EN 10225 355 D BS 7191 S 355 G2+N
355 E S 355 G3+N
355 EM S 355 G7+N
355 EMZ S 355 G8+N
450 EM S 460 G1+QT