What is S355JR equivalent grades

S355JR steel is common carbon structural steel that can be used in construction, tanks, buildings, bridges, machines. It is origioned from Europe. In other countries, there are also similar steel materials or called S355JR equivalent grades. They are Q345B-China material, A572 Gr 50-America material, ST52-3-Germany material, SM490B-Japanese material, etc.

Chemical composition of S355JR equivalent grades:

Grade

C (t≤16mm)

Q345B

0.20 max

0.50 max

1.70 max

0.035 max

0.07 max

0.15 max

0.20 max

0.30 max

0.50 max

0.30 max

0.012 max

0.1 max

A572 Gr 50

0.23 max

0.40 max

1.35 max

0.04 max

0.05 max

S355JR

0.27 max

0.60 max

1.70 max

0.045 max

0.60 max

0.014 max

ST52-3

0.22 max

0.50 max

SM490B

0.20 max

0.55 max

1.60 max

0.035 max

Mechanical properties of S355JR equivalent grades:

Grade	Yield strength ReH/(N/mm2) (t≤16mm) min	Tensile strength Rm/(N/mm2) (3mm≤t≤16mm)	Elongation A/%(3mm≤t≤40mm) min	Charpy V test
Grade	Yield strength ReH/(N/mm2) (t≤16mm) min	Tensile strength Rm/(N/mm2) (3mm≤t≤16mm)	Elongation A/%(3mm≤t≤40mm) min	Temperature/℃	Impact energy (Longitudinal)/J min
Q345B	345	470-630	20	20	34
A572 Gr 50	345	450	18	-	-
S355JR	355	470-630	22	20	27
ST52-3	355	490-630	22	0	27
SM490B	295	490-610	18

S355JR equivalent grades have very close chemical composition and mechanical properties to that of S355JR steel. Both the S355JR equivalent grades Q345B, A572 Gr 50, ST52-3, SM490B and S355JR steel are main products of BBN steel. Welcome to contact BBN steel for price, features, application, and so on information about those materials.

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