YB/T 5055-2025 Crane rails
1 Scope
This document specifies the ordering content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, mark and quality certificate for crane rails.
This document is applicable to QU70 to QU120 rails (hereinafter referred to as "rails") used for the tracks of crane carts and crane trolleys.
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 222 Permissible tolerances for chemical composition of steel products
GB/T 223.12 Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
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 223.23 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 223.37 Methods for chemical analysis of iron, steel and alloy - The indophenol blue photometric methods for the determination of nitrogen content after distillation separation
GB/T 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
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 223.59 Iron, steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
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 223.68 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 223.71 Methods for chemical analysis of iron, steel and alloy - The gravimetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 223.82 Steel and iron - Determination of hydrogen content - Inert gas impulse fusion heat conductivity method
GB/T 226 Etch test for macrostructure and defect of steels
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 2101 General requirement of acceptance, packaging, marking and certification for section steel
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 11261 Steel and iron - Determination of oxygen content - The pulse heating inert gas fusion-infra-red absorption method
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (routine method)
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
TB/T 2344.1-2020 Rails - Part 1: 43 kg/m~75 kg/m rails
YB/T 081 Rule for rounding off of numerical values and judgment of testing values for technical standards of metallurgy
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
heat
all cast billets cast from one heat of molten steel, excluding the first cast billet cast from the next heat of molten steel that enters the tundish
3.2
sequence
continuous casting of molten steel of different heats but the same grade in the tundish
4 Ordering contents
The contract or order placed in accordance with this document shall at least include the following contents:
a) number of this document;
b) product name;
c) model;
d) grade;
e) quantity and length;
f) delivery state;
g) special requirements.
5 Dimensions, shape and weight
5.1 Dimensions and allowable deviations
5.1.1 The cross-section form and dimensions of the rails shall meet those specified in Annex A.
5.1.2 The allowable deviations of rail dimensions shall meet those specified in Table 1.
Table 1 Allowable deviations of rail dimensions
Model Item Allowable deviation/mm Template drawing numbera
QU70
QU80
QU100
QU120 Rail heightᵇ (H) ±0.8 Figure B.3
Rail head width (WH) ±1.0 Figure B.4
Section asymmetry (As) ±2.0 Figure B.5
Rail web thickness (WT) ±1.0 Figure B.6
Rail base width (WF) +1.0
-2.0 Figure B.7
Rail base indentation or protrusion ≤0.4 —
End face inclination (vertical and horizontal directions) ≤2.0 —
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Ordering contents
5 Dimensions, shape and weight
6 Technical requirements
7 Test method
8 Inspection rules
9 Packaging, mark, and quality certificate
Annex A (Normative) Profile dimensions of rail cross-sections
Annex B (Normative) Schematic diagrams of rail geometric dimension inspection templates
Annex C (Normative) Unacceptable defects on acid-etched test piece of rail cross-section
YB/T 5055-2025 Crane rails
1 Scope
This document specifies the ordering content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, mark and quality certificate for crane rails.
This document is applicable to QU70 to QU120 rails (hereinafter referred to as "rails") used for the tracks of crane carts and crane trolleys.
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 222 Permissible tolerances for chemical composition of steel products
GB/T 223.12 Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
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 223.23 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 223.37 Methods for chemical analysis of iron, steel and alloy - The indophenol blue photometric methods for the determination of nitrogen content after distillation separation
GB/T 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
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 223.59 Iron, steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
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 223.68 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 223.71 Methods for chemical analysis of iron, steel and alloy - The gravimetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 223.82 Steel and iron - Determination of hydrogen content - Inert gas impulse fusion heat conductivity method
GB/T 226 Etch test for macrostructure and defect of steels
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 2101 General requirement of acceptance, packaging, marking and certification for section steel
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 11261 Steel and iron - Determination of oxygen content - The pulse heating inert gas fusion-infra-red absorption method
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (routine method)
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
TB/T 2344.1-2020 Rails - Part 1: 43 kg/m~75 kg/m rails
YB/T 081 Rule for rounding off of numerical values and judgment of testing values for technical standards of metallurgy
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
heat
all cast billets cast from one heat of molten steel, excluding the first cast billet cast from the next heat of molten steel that enters the tundish
3.2
sequence
continuous casting of molten steel of different heats but the same grade in the tundish
4 Ordering contents
The contract or order placed in accordance with this document shall at least include the following contents:
a) number of this document;
b) product name;
c) model;
d) grade;
e) quantity and length;
f) delivery state;
g) special requirements.
5 Dimensions, shape and weight
5.1 Dimensions and allowable deviations
5.1.1 The cross-section form and dimensions of the rails shall meet those specified in Annex A.
5.1.2 The allowable deviations of rail dimensions shall meet those specified in Table 1.
Table 1 Allowable deviations of rail dimensions
Model Item Allowable deviation/mm Template drawing numbera
QU70
QU80
QU100
QU120 Rail heightᵇ (H) ±0.8 Figure B.3
Rail head width (WH) ±1.0 Figure B.4
Section asymmetry (As) ±2.0 Figure B.5
Rail web thickness (WT) ±1.0 Figure B.6
Rail base width (WF) +1.0
-2.0 Figure B.7
Rail base indentation or protrusion ≤0.4 —
End face inclination (vertical and horizontal directions) ≤2.0 —
Contents of YB/T 5055-2025
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Ordering contents
5 Dimensions, shape and weight
6 Technical requirements
7 Test method
8 Inspection rules
9 Packaging, mark, and quality certificate
Annex A (Normative) Profile dimensions of rail cross-sections
Annex B (Normative) Schematic diagrams of rail geometric dimension inspection templates
Annex C (Normative) Unacceptable defects on acid-etched test piece of rail cross-section
