ASTM A572 grade 50 steel is columbium vanadium steel that offers a minimum yield strength of 345 Mpa. ASTM A572 grade 50 steel is noted for its increased resistance to atmospheric corrosion, which also owns to the added elements of columbium and vanadium. However, because ASTM A572 grade 50 steel contains more alloying elements than common carbon steel, it is somewhat more difficult to form, to cold work. But ASTM A572 grade 50 steel can be successfully bent or shaped but requires more force than common carbon steel. ASTM A572 grade 50 equivalent EN steel grade is S355JR.
ASTM A572 grade 50 equivalent EN steel grade S355JR chemical composition:
| Grade |
C (t≤16mm) |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
Cr |
Ni |
Cu |
N |
Mo |
| A572 grade 50 |
0.26 max |
0.40 max |
1.65 max |
0.040 max |
0.050 max |
- |
- |
- |
- |
- |
- |
- |
- |
| S355JR |
0.27 max |
0.60 |
1.70 max |
0.045 max |
0.045 max |
- |
- |
- |
- |
- |
0.60 max |
0.014 max |
- |
ASTM A572 grade 50 equivalent EN steel grade S355JR mechanical properties:
| Grade |
Yield strength
ReH/(Mpa)
(t≤16mm) min |
Tensile strength Rm/(Mpa)
(3mm≤t≤16mm) |
Elongation
A/% min
(3mm≤t≤40mm) min |
Charpy V test |
| Temperature/℃ |
Impact energy (Longitudinal)/J min |
| A572 Grade 50 |
345 |
450 |
18 |
- |
- |
| S355JR |
355 |
470-630 |
22 |
20 |
27 |
ASTM A572 grade 50 equivalent EN steel grade S355JR has become one of the most useful grades steel with the feature of 355 Mpa high yield strength. JR designation is confirming that S355JR steel has gone through the longitudinal chary V-notch impact tests at room temperature (27J Joules). ASTM A572 grade 50 equivalent EN steel grade S355JR is widely used in the construction and structural engineering industries.
