What is the A572gr50 steel plate equal Grade?
 

As you know that, the A572gr50 is astm A572 standard steel plate grade. 

1. What is the A572gr50 chemical ?  

If you want to use the A572gr50 steel plate equal grade

C should be max 0.23%,  

Mn should be max 1.35% 
P and S  should be max 0.04% , Sometimes, there are parts of elements , Ni, Cr, N, Ti, Al and others. 

2. What the A572GR50 Property ?

The Yield strength is min 345Mpa, and the tensil is min 450Mpa 

3. If we know the A572GR50 steel plate chemical and property,  Then we can check A572gr50 steel plate equal Grade. 
 

    GB standard,  You can use the Q345B, Q345A, and Q345C, the chemical and property are nearly the same. 
    JS standard,   You can use the JIS SM490
    EN standard,  you can use the EN S355JR, S355J0
    DIN standard , You can use the ST52-3 
   

4. You can see the A572gr50 steel plate equal Grade information one by one 

GB/T1591-2008  Q345A/ L03451  Yield strength 345MPA min,  C 0.2%  Si 0.5%, Mn 1.7% P 0.035%, S 0.035%, V 0.15%, Ti 0.05%, NB 0.07%, Al -             CR 0.3%  Ni 0.05% Mo 0.1%, N 0.012%, Cu 0.3%  
GB/T1591-2008  Q345B/ L03452  Yield strength 345MPA min,  C 0.2%  Si 0.5%, Mn 1.7% P 0.035%, S 0.035%, V 0.15%, Ti 0.05%, NB 0.07%, Al 0.015%  CR 0.3%  Ni 0.05% Mo 0.1%, N 0.012%, Cu 0.3%  
CNS 4269-2002  SM490AW           Yield strength 355MPA min,  C 0.18%  Si 0.15-0.65%, Mn 1.4% P 0.035%, S 0.035%,  CR 0.75%  Ni 0.3% Mo 0.1%, N 0.012%, Cu 0.3-0.5% 
ISO4951-2001    E355M                  Yield strength 355MPA min,  C 0.16%  Si 0.5%, Mn 1.6% P 0.035%, S 0.035%,  V0.01-0.1% Ti 0.05% Nb 0.05-0.5% al min 0.02% Ni 0.3% Mo 0.2%, N 0.015%, 
ISO4996-2007    HS355C               Yield strength 355MPA min,  C 0.2%  Si 0.5%, Mn 1.6% P 0.04%, S 0.04%,  V0.01% Ti 0.01% Nb 0.8%  
ISO4996-2007    HS355D               Yield strength 355MPA min,  C 0.2%  Si 0.5%, Mn 1.6% P 0.04%, S 0.04%,  V0.01% Ti 0.01% Nb 0.8%  
JIS G3108-2004  SM520C
ks d3529 SM490AW
is2041-2000 Grade 3
IS5986 -2002  Fe510
DIN EN10025-2 2004 E355JR/1.0045
DIN EN 10025-2 2004  E355/1.006
NF EN10025-2 2004 E355JR
ASTM A633/633M 2001 A633 Grade A, A633 Grade D, A633 Grade C 

For more  A572gr50 steel plate equal Grade information, please check A572GR50 STEEL PLATE DETAIL