​The Relevant Family Steel Grades of P355NH:  
P275NH, P275NL1, P275NL2, P355N, P355NH, P355NL1, [SCALE STEEL]P355NL2, P460NH, P460NL1, P460NL2.  
 
Steel Grade Levels:  
Room Temperature Quality Class: P355N  
High Temperature Quality Grade: P355NH  
Low Temperature Quality Grade: P355NL1, P460NL1  
Special Low Temperature Quality Grade: [SCALE STEEL]P355NL2, P460NL2  
 
Tensile Properties  
P355N, P355NH, P355NL1, P355NL2 thickness 8-260mm  
Tensile strength RM630-450mpa, yield strength: 355-295mpa, elongation after fracture 21-22%  
 
Evaluation of Hydrogen Induced Crack Resistance  
The evaluation test for hydrogen cracking resistance of steel plate products shall be carried out according to EN10229, and A test solution[SCALE STEEL] (PH 3) or B test solution (PH 5) and corresponding acceptance criteria can be selected.  
 
HIC Test Acceptance Grade:  
Acceptance grade: Grade I, Grade II, grade III  
CLR% crack length ratio, CTR% crack [SCALE STEEL]thickness ratio, CSR% crack sensitivity ratio.  
 
Application Countries:  
P355NH is used in Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, [SCALE STEEL]Luxembourg, Malta, The Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland, the United Kingdom.  

S355NL Steel Plate belongs to standard of EN10025-3. Full Name: Normalizing/Normalizing rolled weldable fine grain structure steel plates. This standard together with EN10025-1 replaces EN 10113-1:1993 hot rolled steel products with weldable [SCALE STEEL]fine grain structure -- Part 1: General Conditions and EN 10113-2:  Hot-rolled weldable fine grain structural steel products - Part 2: Conditions for normalizing/normalizing rolled steel.  When the temperature is not less than -20°C, the minimum impact energy is specified, denoted by N. When the temperature is not less than -50°C, the minimum impact energy is specified, denoted by NL.  
 
Name of Steels:
S: for structural steel, N: state, capital L: [SCALE STEEL]specifies the level of minimum impact energy at a temperature not lower than -50°C.  
 
Property Performance  
Strength: Tensile strength: RM630-450mpa.  Yield strength: 355-275mpa, elongation after fracture 21-22%.  
 
National Standards Corresponding [SCALE STEEL]to S355NL:  
GB: Q345E  
JIS: SEV245  
ASTM: Type 3 Grade 50  
 
The Typical Application of S355NL Steel Plate:
Construction machinery, mining [SCALE STEEL]machinery, metallurgy, environmental protection, water conservancy and hydropower structural parts.