Product Description:

Name: WDB620 

Main Technical Parameters:

Technical Conditions of WDB620:

Gade: C

Chemical composition (smelting analysis):

C:0.09%,Si:0.15%--0.40%,Mn:1.00%--1.60%,P≤0.020%,S:≤0.015,Cu:≤0.30%,Ni:≤0.30%,Cr:≤0.30%,Mo:≤0.30%,V:≤0.08%,Nb:≤0.08%,B:≤0.0030%,Ti:0.012%--0.125%,Pcm:≤0.20%.

Gade: D

Chemical composition (smelting analysis):

C:0.09%,Si:0.15%--0.40%,Mn:1.00%--1.60%,P≤0.020%,S:≤0.015,Cu:≤0.30%,Ni:≤0.30%,Cr:≤0.30%,Mo:≤0.30%,V:≤0.08%,Nb:≤0.08%,B:≤0.0030%,Ti:0.012%--0.125%,Pcm:≤0.20%,

Notes:

1. Pcm≤0.20%(%),Ceq≤0.42%;(under the delivery status of controlled rolling plus tempering)

2. C≤0.12%, Pcm≤0.24% (under the delivery status of quenched and tempered state)

3. Pcm (%) = C + Si + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V/10 +5 B

Specifications:

1.The range of thickness is 8-100mm.

2.The  steel plate, thickness≤50mm, and thickness>50-100mm are adopting TMCP, quenching and tempering production process respectively.

Availability of technical conditions: 

1. Pcm≤0.2%，Ceq≤0.42% (under the delivery condition of controlled rolling plus tempering)

2.Smelting method: The steel is smelted in electric furnace and refined outside the electric furnace, including vacuum treatment by VD.

3. Regarding the mechnical and process performance of WDB620, the corresponding steel types in foreign coutries are HITEN610U2、SUMITEN62F

Advantages of WDB620:

1.Good strength and toughness,

2.Eexcellent impact toughness under low temperature and cold formability,

3.Good weldability, ecpecially the steel plate with thickness≤50mm. It has the characteristics of no preheating before welding and no heat treatment after welding,which makes the operation of construction site easy.

Main Applications:

With C and D grades,the low welding crack sensitivity high strength steel plate for pressure steel pipe,WDB620, can be used for producing hydropower pressure steel pipes and unit spiral cases, bridges, ships,offshore plateforms,mining machinery, engineering machinery and other industries.