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EQ56 Z35 Project , A517GrQ Project
EQ56 Z35 Project

Gangsteel Project in ABS EQ56 (Z35) steel plate

 

2011 years New project in Ship for Singapore.

A.      Applicable scope

The technology conditions apply to AB/EQ56 (Z35) steel plate which the thickness is not more than 100mm..

B.      Size, outline and weight are allowed exist deviation.

1.       The tolerance of thickness should accord with ABS’s stipulations, that the thickness of the limit negative

deviation is -0.33

2. The other size, outline, weight and allowable deviation of steel plates should accord with ABS’s stipulations.

 

C. Technical requirements

1. Chemical composition (Heat analysis)

The chemical composition (heat analysis) should be accordance with table 1

Steel Grade

C

Si

Mn

P

S

N

AB/EQ56(Z35)

0.20

0.55

1.70

0.030

0.030

0.02

  Attention: According to analysis the gas of finished furnace[N]200ppm

2.Smelting process: The steel is fine grain calm steel from electric furnace and LF/VD

3. Delivery condition: quenched and tempered

4. Mechanical properties

The results of mechanical testing should be accordance with table2

Steel Grade

Rp0.2,MPa

Rm , MPa

A,

-40 Akv , landscape orientation

(ClassZ35)Z,

AB/EQ56(Z35)

550

670-835

16

37

35

 

Attention:  Elongation rate

5. Surface quality should accord with ABS’s stipulations

6. Ultrasonic test

The results of ultrasonic test should be accordance with Class C in ASTM A578

D. Inspection rules, inspection items and experimental methods

1. The steels should make heat treatment one by one for inspecting it’s mechanical property

2. The inspection items, sampling number , inspection and experimental methods should comply with table3

Number

Inspection items

orientation

Sampling number

Experimental methods

1

Stretch

Landscape

1

ABS

2

impulsion

Landscape

3

ABS

3

Gas

/

1

GB/T14265

4

Thickness tensile

Thicknese Z

3

GB5313

3. The retest of inspection items should comply with ABS

 

E. The mechanical inspection of steel plates should be authenticated by ABS

F. Mark and quality certificate

1. The technical conditions of mark and quality certificate should be ABS

2. The quality certificate should comply with the stipulations of 3.2  type  in  EN10204:.

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