07Ni5DR Nickel Alloy Steel Plate for Pressure Equipment
Compliant with GB/T 713.4—2023 | Quenched + Tempered (or Quenched + Quenched + Tempered) | Nickel Alloy Steel with Specified Low Temperature Properties | For Pressure Equipment
1 Scope
This document specifies the designation representation method, ordering content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of nickel alloy steel plates with specified low temperature properties for pressure equipment. This document applies to nickel alloy steel plates (hereinafter referred to as steel plates) with specified low temperature properties for service temperatures not lower than -196℃ and thickness not greater than 150mm.
2 Normative References
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative referenced document (including any amendments) applies.
| No. | Standard and Title |
|---|---|
| 1 | GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method |
| 2 | GB/T 223.9 Iron, steel and alloy - Determination of aluminum content - Chrome azurol S spectrophotometric method |
| 3 | GB/T 223.12 Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenylcarbazide photometric method for the determination of chromium content |
| 4 | 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 |
| 5 | GB/T 223.23 Iron, steel and alloy - Determination of nickel content - Dimethylglyoxime spectrophotometric method |
| 6 | GB/T 223.25 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content |
| 7 | GB/T 223.26 Iron, steel and alloy - Determination of molybdenum content - Thiocyanate spectrophotometric method |
| 8 | GB/T 223.40 Iron, steel and alloy - Determination of molybdenum content - Chlorosulfophenol S spectrophotometric method |
| 9 | GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method |
| 10 | GB/T 223.63 Iron, steel and alloy - Determination of manganese content - Sodium periodate (potassium) spectrophotometric method |
| 11 | GB/T 223.76 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of vanadium content |
| 12 | GB/T 223.79 Iron and steel - Determination of multi-element contents - X-ray fluorescence spectrometry (routine method) |
| 13 | GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace |
| 14 | GB/T 223.86 Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace |
| 15 | GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature |
| 16 | GB/T 229 Metallic materials - Charpy pendulum impact test method |
| 17 | GB/T 232 Metallic materials - Bending test method |
| 18 | GB/T 713.1 Steel plate, sheet and strip for pressure equipments - Part 1: General requirements |
| 19 | GB/T 2975 Steel and steel products - Location and preparation of samples for mechanical testing |
| 20 | GB/T 4336 Carbon steel and low-alloy steel - Determination of multi-element content - Spark discharge atomic emission spectrometric method (routine method) |
| 21 | GB/T 5313 Steel plates with through-thickness characteristics |
| 22 | GB/T 6803 Drop-weight tear test method for ferritic steels |
| 23 | GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition |
| 24 | GB/T 20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method) |
| 25 | GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method |
| 26 | NB/T 47013.3 Non-destructive testing of pressure equipments - Part 3: Ultrasonic testing |
3 Terms and Definitions
The terms and definitions defined in GB/T 713.1 apply to this document.
4 Designation Representation Method
The designation of steel is composed of: two digits representing the average carbon content (in ten-thousandths), the symbol of nickel element and its average content, and the Chinese pinyin initials "DR" for "low temperature pressure vessel".
Example: 06Ni9DR. Where: 06—average carbon content (in ten-thousandths); Ni9—average nickel content of 9%; DR—Chinese pinyin initials for "low" and "vessel".
5 Ordering Content
The ordering content of steel plates shall comply with GB/T 713.1.
6 Dimensions, Shape, Weight
The dimensions, shape and weight of steel plates shall comply with GB/T 713.1.
7 Technical Requirements
7.1 Designation and Chemical Composition
7.1.1 The designation and chemical composition (ladle analysis) of steel shall comply with Table 1. The chemical composition of 07Ni5DR is shown in the table below.
| Grade | C | Si | Mn | Ni | P | S | Cr | Cu | Mo | V | Nb | Alt |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 07Ni5DRc | ≤0.10 | 0.10～0.35 | 0.30～0.80 | 4.75～5.25 | ≤0.015 | ≤0.005 | ≤0.25 | ≤0.35 | ≤0.10 | ≤0.05 | ≤0.08 | ≥0.015 |
7.1.2 The allowable deviation of chemical composition of finished steel plates shall comply with GB/T 713.1.
a) For grades other than 06Ni7DR, Cr+Mo+Cu ≤ 0.50%.
b) For thickness greater than 100mm, the upper limit of C content may be increased to 0.12%.
c) For thickness greater than 50mm, the upper limit of C content may be increased to 0.12%.
7.2 Manufacturing Method
The manufacturing method of steel plates shall comply with GB/T 713.1.
7.3 Delivery Condition
7.3.1 08Ni3DR steel plates shall be delivered in normalized or normalized plus tempered condition. With the buyer's consent, quenching plus tempered condition may be adopted.
7.3.2 07Ni5DR, 06Ni7DR and 06Ni9DR steel plates shall be delivered in quenching plus tempered or quenching plus quenching plus tempered condition.
7.4 Mechanical and Technological Properties
7.4.1 The general requirements for mechanical and technological properties of steel plates shall comply with GB/T 713.1.
7.4.2 The mechanical and technological properties of steel plates shall comply with Table 2. The mechanical properties of 07Ni5DR are shown in the table below.
| Grade | Nominal Thickness (mm) | Tensile Testa | V-Notch Impact Testa | 180° Bending Testc b=2a |
|||
|---|---|---|---|---|---|---|---|
| Lower Yield Strengthb ReL /MPa (≥) | Tensile Strength Rm /MPa | Elongation A/% (≥) | Temperature /℃ | Impact Absorbed Energy KV2/J (≥) | |||
| 07Ni5DR | 5～30 | 370 | 530～700 | ≥20 | -120 | ≥60 | D=3a |
| >30～50 | 360 | ||||||
| >50～80 | 350 | ||||||
7.4.3 For 06Ni7DR and 06Ni9DR steel plates, the lateral expansion value of impact specimens shall be measured and shall not be less than 0.64mm.
a Transverse specimens shall be taken for tensile and impact tests.
b When the yield phenomenon is not obvious, Rp0.2 may be used instead of the lower yield strength.
c Transverse specimens shall be taken for bending test. The specimen width shall be 2 times the plate thickness, with a minimum width of not less than 20mm.
7.5 Surface Quality
The surface quality of steel plates shall comply with GB/T 713.1.
7.6 Non-destructive Testing
Ultrasonic testing of steel plates shall be carried out according to NB/T 47013.3, and the acceptance level shall be not lower than Level I. Special requirements shall be specified in the contract.
7.7 Residual Magnetism Test
For 06Ni7DR and 06Ni9DR steel plates, each plate shall be tested for residual magnetism using a gaussmeter before leaving the factory. The residual magnetism measurement position shall be agreed upon by the supplier and the buyer. The residual magnetism value shall not exceed 50×10-4 Tesla (50 Gauss). Residual magnetism test for 07Ni5DR shall be agreed upon by the supplier and the buyer. 07Ni5DR has no mandatory residual magnetism test requirement.
7.8 Surface Treatment
06Ni7DR and 06Ni9DR steel plates shall be shot blasted after heat treatment to remove the oxide scale on the plate surface. 07Ni5DR has no mandatory shot blasting requirement.
7.9 Special Requirements
7.9.1 Upon buyer's request and agreement between the supplier and the buyer, the steel plates may be subject to drop weight test, through-thickness property test, etc. When carrying out the drop weight test, take a set of two specimens from the thickest steel plate of each heat. If the maximum thickness of the steel plate of that heat is less than 16mm, the drop weight test shall not be carried out.
7.9.2 Upon buyer's request and agreement between the supplier and the buyer, the steel plates may also be subject to other tests.
8 Test Methods
8.1 The chemical composition test of steel shall generally be carried out according to GB/T 4336, GB/T 20123, GB/T 20125 or general chemical analysis methods. In case of arbitration, it shall be carried out according to GB/T 223.5, GB/T 223.9, GB/T 223.12, GB/T 223.18, GB/T 223.23, GB/T 223.25, GB/T 223.26, GB/T 223.40, GB/T 223.59, GB/T 223.63, GB/T 223.76, GB/T 223.79, GB/T 223.85, GB/T 223.86.
8.2 The test methods for each batch of steel plates shall comply with Table 3.
| No. | Inspection Item | Sample Quantity | Sampling Method | Test Method |
|---|---|---|---|---|
| 1 | Chemical composition | 1 per heat | GB/T 20066 | See 8.1 |
| 2 | Tensile test | 1 per batch | GB/T 2975 | GB/T 228.1 |
| 3 | Impact test | 3 per batch | GB/T 2975b | GB/T 229 |
| 4 | Bending test | 1 per batch | GB/T 2975 | GB/T 232 |
| 5 | Ultrasonic testing | Each plate | — | NB/T 47013.3 |
| 6 | Residual magnetism test | Each plate | — | Suitable measuring tools |
| 7 | Drop weight test | 2 per heat | GB/T 2975 | GB/T 6803 |
| 8 | Through-thickness (Z-direction) reduction of area | 3 per batch | GB/T 5313 | GB/T 5313 |
| 9 | Dimensions and shape | Each plate | — | Suitable measuring tools |
| 10 | Surface quality | Each plate | — | Visual and measurement |
9 Inspection Rules
9.1 Inspection and Acceptance: The inspection of steel plates shall be carried out by the supplier's quality inspection department.
9.2 Batch Formation:
9.2.1 08Ni3DR shall be accepted in batches. Each batch shall consist of steel plates of the same designation, same heat number, same thickness and same heat treatment system. The weight of each batch shall not exceed 30t. Steel plates with a single weight exceeding 30t shall be batched individually.
9.2.2 07Ni5DR, 06Ni7DR and 06Ni9DR shall be batched by each heat treatment piece.
9.3 Sampling Quantity and Sampling Method: The sampling quantity and sampling method for each batch of steel plates shall comply with Table 3.
9.4 Re-inspection and Judgment Rules: The re-inspection and judgment rules of steel plates shall comply with GB/T 713.1.
9.5 Rounding of Numerical Values: Rounding of numerical values shall comply with GB/T 713.1.
10 Packaging, Marking, Quality Certificate and Transportation & Storage
10.1 The packaging, marking and quality certificate of steel plates shall comply with GB/T 713.1.
10.2 The tempering temperature shall be indicated on the quality certificate. Upon buyer's request, the actual heat treatment process may be indicated.
10.3 The surface anti-corrosion and transportation requirements of steel plates shall be subject to the agreement between the supplier and the buyer.
10.4 Steel plates that have passed the residual magnetism test shall not be lifted by electromagnetic cranes. The plates shall not be stored near high voltage power lines or high voltage electrical equipment, shall not be transported via electrified railways, or shall not be stored in other environments that may affect the residual magnetism level.
Appendix A (Informative) Approximate Designation Comparison Between This Document and Foreign Standards
| This Document | DNV Rules 2021 | ISO 9328-4:2018 | EN 10028-4:2017 | JIS G 3127:2021 | ASTM A203/A203M-17 |
|---|---|---|---|---|---|
| 07Ni5DR | NV5Ni/a | X12Ni5 | X12Ni5 | SL5N590 | — |