GB/T 16253-2019 English PDF (GBT16253-2019)

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GB/T 16253-2019: Steel castings for pressure purposes
GB/T 16253-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.80
J 31
Replacing GB/T 16253-1996
Steel castings for pressure purposes
(ISO 4991:2015, MOD)
ISSUED ON: AUGUST 30, 2019
IMPLEMENTED ON: MARCH 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Technical requirements ... 9 
4 Test methods ... 17 
5 Inspection rules ... 18 
6 Marks, quality certificate, packaging, transportation and storage ... 21 
7 Supplementary requirements ... 22 
Annex A (informative) Comparison on chapter numbers between this Standard and ISO
4991:2015 ... 23 
Annex B (normative) Supplementary requirements for additional inspection items .. 24 
Annex C (informative) Information that the purchaser needs to provide when ordering
casting products ... 29 
Annex D (informative) Comparison with ISO 4991:2015 cast steel designations ... 30 
Annex E (informative) Allowable deviation between verification analysis results and
smelting analysis results ... 31 
Annex F (informative) Nominal creep properties of some cast steels ... 32 
Annex G (informative) Welding conditions ... 34 
Steel castings for pressure purposes
1 Scope
This document specifies the technical requirements, test methods, inspection rules,
marks, quality specifications, packaging, transportation and storage, supplementary
requirements for steel castings for pressure purposes.
This Standard applies to steel castings for pressure purposes that are made of carbon
steel and alloy steel.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 223.3, Methods for chemical analysis of iron, steel and alloy - The diantipyryl
methane phosphomolybdate gravimetric method for the determination of phosphorus
content
GB/T 223.5, Steel and iron - Determination of acid-soluble silicon and total silicon
content - Reduced molybdosilicate spectrophotometric method (GB/T 223.5-2008,
ISO 4829-1:1986, ISO 4829-2:1988, MOD)
GB/T 223.9, Iron, steel and alloy - Determination of aluminium content - Chrome
azurol S photometric method
GB/T223.11, Iron, steel and alloy - Determination of chromium content - Visual
titration or potentiometric titration method (GB/T 223.11-2008, ISO 4937:1986,
MOD)
GB/T 223.14, Methods for chemical analysis of iron, steel and alloy - The N-benzoyl-
N-phenylhydroxylamine extraction photometric method for the determination of
vanadium content
GB/T 223.18, Methods for chemical analysis of iron steel and alloy - The sodium
thiosulfate separation iodometric method for the determination of copper content
GB/T 223.22, Methods for chemical analysis of iron, steel and alloy - The nitroso-R-
salt spectrophotometric method for the determination of cobalt content
GB/T 223.23, Iron, steel and alloy - Determination of nickel content - The
dimethylglyoxime spectrophotometric method
GB/T 223.25, Methods for chemical analysis of iron, steel and alloy - The
dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.26, Iron, steel and alloy - Determination of molybdenum content - The
thiocyanate spectrophotometric method
GB/T 223.28, Methods for chemical analysis of iron, steel and alloy - The α-benzoin
oxime gravimetric method for the determination of molybdenum content
GB/T 223.30, Methods for chemical analysis of iron, steel and alloy - The arsenazo
Ⅲ spectrophotometric method for the determination of zirconium content after
separation by p-bromomandelic acid
GB/T 223.36, Methods for chemical analysis of iron, steel and alloy - The neutral
titration method for the determination of nitrogen content after distillation separation
GB/T 223.58, Methods for chemical analysis of iron, steel and alloy - The sodium
arsenite-sodium nitrite titrimetric method for the determination of manganese content
GB/T 223.60, Methods for chemical analysis of iron, steel and alloy - The perchloric
acid dehydration gravimetric method for the determination of silicon content
GB/T 223.63, Iron, steel and alloy - Determination of manganese content - Sodium
(potassium) periodate spectrophotometric method
GB/T 223.65, Steel, iron and alloy - Determination of cobalt content - Flame atomic
absorption spectrometric method (GB/T 223.65-2012, ISO 11652:1997, MOD)
GB/T 223.75, Iron, steel and alloy - Determination of boron content - Methanol
distillation-curcumin photometric method
GB/T 223.78, Methods for chemical analysis of iron, steel and alloy. Curcumin
spectrophotometric method for the determination of boron content (GB/T 223.78-
2000, idt ISO 10153:1997)
GB/T 223.81, Iron, steel and alloy - Determination of total aluminum and total boron
contents - Microwave digestion-inductively coupled plasma mass spectrometric
method
GB/T 223.84, Steel and iron - Determination of titanium content -
Diantipyrylmethane spectrophotometric method (GB/T 223.84-2009, ISO
10280:1991, IDT)
GB/T 223.85, Steel and iron - Determination of sulfur content - Infrared absorption
method after combustion in an induction furnace (GB/T 223.85-2009, ISO 4935:1989,
IDT)
GB/T 223.86, Steel and iron - Determination of total carbon content - Infrared
steel in the same furnace and heat treated in the same furnace are one batch;
b) Batch by piece: Each piece is a batch. Only applicable to the products specified
in the technical conditions;
c) Other batching rules agreed upon by both parties.
5.3 Sampling rules
5.3.1 Sampling for chemical analysis
5.3.1.1 According to the provisions of GB/T 5678 or GB/T 20066, take samples from
each molten steel for chemical composition analysis. When there is a dispute between
the supplier and the purchaser on the analysis results, samples can be taken from the
furnace sample, the test block or the specimen representing the casting. According to
GB/T 223.3, GB/T 223.5, GB/T 223.9, GB/T 223.11, GB/T 223.14, GB/T 223.18, GB/T
223.22, GB/T 223.23, GB/T 223.25, GB/T 223.26, GB/T 223.28, GB/T 223.30, GB/T
223.36, GB/T 223.58, GB/T 223.60, GB/T 223.63, GB/T 223.65, GB/T 223.75, GB/T
223.78, GB/T 223.81, GB/T 223.84, GB/T 223.85, GB/T 223.86, check and analyze the
corresponding elements. It may refer to Annex E for the allowable deviation between
the check analysis result and the smelting analysis result or it is negotiated between the
supplier and the purchaser.
5.3.1.2 When the wall thickness is greater than 15mm, samples shall be taken at least
6mm below the casting surface.
5.3.2 Sampling for mechanical properties
5.3.2.1 Room temperature tensile specimen
A tensile test specimen shall be taken from a test block representative of the batch of
castings. The size of the specimen shall comply with the provisions of GB/T 228.1.
5.3.2.2 High temperature tensile specimen
When the high temperature tensile test is specified, the tensile specimen shall be
prepared from the test block according to the quantity specified in the contract. The size
of the specimen shall comply with the provisions of GB/T 228.2.
5.3.2.3 Impact test specimen
When the impact test is specified, a set (three pieces) of Charpy V-notch standard
impact test spe...