1. Speaking of the ocean, think of the blue water and all kinds of marine life. Yes, there are also ships and hull structural steel plates. Today we will learn about several materials. CCS/DH36, CCS/EH36, CCS/FH36.
2. Material description: D, E, F are quality grades, and the impact temperatures are: -20, -40, -60. H is a high-strength building material, with a maximum compression resistance of 36. Z is the Z-direction performance, examples: CCS/DH36-Z15, CCS/DH36-Z25, CCS/DH36-Z35, etc.
3. Relevant technical standards are implemented in accordance with GB/T712-2011 standards.
4. The heat treatment processes of these three materials are different: DH36 can be subjected to annealing, hot rolling, normalizing, controlled rolling, TM and other heat treatment processes; EH36 is generally normalized, TM process; FH36 is generally normalized, TM, quenched and tempered. Process; Note: Different thicknesses will have different heat treatment processes.
5. What are the chemical compositions of CCS/DH36, CCS/EH36 and CCS/FH36?
Grade C Si Mn P S Cu Cr Ni Nb V Ti Mo N ALS
DH36 ≤0.18 ≤0.50 0.90-1.60 ≤0.025 ≤0.025 ≤0.35 ≤0.20 ≤0.40 0.02-0.05 0.05-0.10 ≤0.02 ≤0.08 - ≥0.015
EH36 ≤0.18 ≤0.50 0.90-1.60 ≤0.35 ≤0.20 ≤0.40 0.02-0.05 0.05-0.10 ≤0.02 ≤0.08 - ≥0.015
FH36 ≤0.16 ≤0.50 0.90-1.60 ≤0.020 ≤0.020 ≤0.35 ≤0.20 ≤0.80 0.02-0.05 0.05-0.10 ≤0.02 ≤0.08 ≤0.009 ≥0.015
6. Analysis of mechanical properties of CCS/DH36, CCS/EH36, CCS/FH36
Grade Tensile test V-shaped impact test
Upper yield strength REh/MPa Tensile strength Rm/MPa Elongation after break A% Test temperature/℃ Below thickness (mm) Impact absorbed energy KV2/J
≤50 50-70 70-150
Vertical Horizontal Vertical Horizontal Vertical Horizontal
not less than
DH36 ≥355 490-630 ≥21 -20 34 24 41 27 50 34
EH36 ≥355 490-630 ≥21 -40 34 24 41 27 50 34
FH36 ≥355 490-630 ≥21 -60 34 24 41 27 50 34
7. CCS/DH36, CCS/EH36 and CCS/FH36 materials are relatively common in marine and shipbuilding engineering. This article gives a brief introduction to their materials, composition and performance.
