CB/T 778-2011
Specifications for marine diesel engine steel forging (English Version)

Standard No.

CB/T 778-2011

Language

Chinese, Available in English version

Release Date

2011

Published By

Professional Standard-Ships

Latest

CB/T 778-2011

Replace

CB/T 778-1986

Scope

This standard specifies the requirements, testing, inspection rules, markings and quality certificates for marine diesel engine steel forgings. This standard applies to the manufacturing and acceptance of carbon structural steel, alloy structural steel, stainless steel, heat-resistant steel and other forgings (hereinafter referred to as forgings) for medium and low-speed marine diesel engines. This standard does not apply to the manufacturing and acceptance of marine diesel engine crankshaft forgings.

CB/T 778-2011 Referenced Document

• GB/T 10561-2005 Steel.Determination of content of nonmetallic inclusions.Micrographic method using standards diagrams
• GB/T 1220 Stainless steel bars
• GB/T 1221 Heat-resistant steel bars
• GB/T 222 Permissible tolerances for chemical composition of steel products
• GB/T 223.11 Determination of chromium content in iron, steel and alloy by visual titration or potentiometric titration
• GB/T 223.19 Methods for chemical analysis of iron,steel and alloy--The neocuproine-chloroform extraction photometric method for the determination of copper content
• GB/T 223.23 Iron,,steel and alloy.Determination of nickel content.The dimethylglyoxime spectrophotometric method
• GB/T 223.26 Iron,steel and alloy.Determination of molybdenum content.The thiocyanate spectrophotometric method
• GB/T 223.5 Steel and iron.Determination of acid-soluble silicon and total silicon content.Reduced molybdosilicate spectrophotometric method
• GB/T 223.59 Iron,steel and alloy.Determination of phosphorus content.Bismuth phosphomolybdate blue spectrophotometic method and antimony phosphomolybdate blue spectruophotometric method
• GB/T 223.63 Iron, steel and alloy—Determination of manganese content—Sodium (potassium) periodate spectrophotometric method*， 2022-07-11 Update
• GB/T 223.68 Methods for chemical analysis of iron, steel and alloy. The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
• GB/T 223.69 Iron,steel and alloy.Determination of carbon contents.Gas-volumetric method after combustion in the pipe furnace
• GB/T 228 Metallic materials--Tensile testing at ambient temperature
• GB/T 229 Metallic materials—Charpy pendulum impact test method*， 2020-09-29 Update
• GB/T 231.1 Metallic materials—Brinell hardness test—Part 1: Test method*， 2018-05-14 Update
• GB/T 3077 Alloy structure steels*， 2015-12-10 Update
• GB/T 4334.1 Method of 10 per cent oxalic acid etch test for stainless steels
• GB/T 6394-2002 Metal-methids for estimating the average grain size
• GB/T 699 Quality carbon structure steels*， 2015-12-10 Update
• GB/T 700 Carbon structural steels
• JB/T 4730.3 Nondestructive testing of pressure equipments

CB/T 778-2011 history

• 2011 CB/T 778-2011 Specifications for marine diesel engine steel forging
• 1986 CB/T 778-1986 Specifications for steel forgings for marine diesel engines