GB/T 24444-2026 Electroslag remelting mould English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 24444-2026
Electroslag remelting mould
电渣重熔结晶器
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification, Designation and Marking
4.1 Classification
4.2 Designation
4.3 Marking
5 Specifications and Dimensions
6 Technical Requirements
6.1 Inner Liner
6.2 Outer Casing
6.3 Water Guide Structure
6.4 Welds
6.5 Overall Sealing
7 Test Methods
7.1 Materials
7.2 Welds
7.3 Surface Quality
7.4 Taper
8 Inspection Rules
8.1 Inspection Items
8.2 Conformity Judgement
9 Marking, Accompanying Documents, Packaging, Transport and Storage
9.1 Marking
9.2 Accompanying Documents
9.3 Packaging
9.4 Transport and Storage
Bibliography
Electroslag remelting mould
1 Scope
This document specifies the classification, designation and marking, specifications and dimensions, technical requirements, inspection rules, marking, accompanying documents, packaging, transport and storage for electroslag remelting moulds, and describes the corresponding test methods.
This document applies to the manufacture of electroslag remelting moulds with a nominal weight of 0.03 t to 300 t and circular or rectangular cross sectional shapes.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 700 Carbon structural steels
GB/T 1031-2009 Geometrical product specifications (GPS) — Surface texture: Profile method — Surface roughness parameters and their values
GB/T 1804-2000 General tolerances — Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 2040-2017 Copper and copper alloy sheets and plates
GB/T 4237 Hot rolled stainless steel plate, sheet and strip
GB/T 5121 (all parts) Methods for chemical analysis of copper and copper alloys
GB/T 9460 Copper and copper alloy wires for welding
GB/T 13384 General specifications for packaging of mechanical and electrical products
NB/T 47013.3-2023 Nondestructive testing of pressure equipment — Part 3: Ultrasonic testing
NB/T 47013.5-2015 Nondestructive testing of pressure equipment — Part 5: Penetrant testing
NB/T 47013.7 Nondestructive testing of pressure equipment — Part 7: Visual testing
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 electroslag remelting mould
A water cooled mould used for holding molten slag and molten steel during electroslag remelting.
3.2 nominal weight
The maximum weight of the electroslag remelting ingot that the electroslag remelting mould is designed to hold.
3.3 inner liner nominal diameter
The average value of the large and small diameters of the inner cavity of a circular electroslag remelting mould.
3.4 inner liner nominal width
The average value of the large and small widths of the inner cavity of a rectangular electroslag remelting mould.
3.5 inner liner nominal length
The average value of the large and small lengths of the inner cavity of a rectangular electroslag remelting mould.
3.6 inner liner nominal height
The vertical distance from the large end to the small end of the inner cavity of an electroslag remelting mould.
4 Classification, Designation and Marking
4.1 Classification
Electroslag remelting moulds (hereinafter referred to as “moulds”) are classified by cross sectional shape into circular moulds and rectangular moulds. A schematic diagram of a circular mould is shown in Figure 1, and a schematic diagram of a rectangular mould is shown in Figure 2.
4.2 Designation
The product designation and cross sectional shape code for moulds are as follows:
a) Product designation — DZJ;
b) Circular — A;
c) Rectangular — B.
NOTE: “DZJ” is the initial capital letters of the Chinese Pinyin for “electric”, “slag” and “mould”.
4.3 Marking
The marking method for moulds is as follows:
Example 1: A circular mould with an inner liner nominal diameter of 900 mm, an inner liner nominal height of 2500 mm, and a nominal weight of 9 t is marked as:
Electroslag remelting mould DZJ A 900 2500 9 GB/T 24444 2026
Example 2: A rectangular mould with an inner liner nominal length of 700 mm, an inner liner nominal width of 650 mm, an inner liner nominal height of 2000 mm, and a nominal weight of 5 t is marked as:
Electroslag remelting mould DZJ B 700 × 650 2000 5 GB/T 24444 2026
5 Specifications and Dimensions
5.1 Recommended specifications and dimensions for circular moulds are given in Table 1.
5.2 Recommended specifications and dimensions for rectangular moulds are given in Table 2.
6 Technical Requirements
6.1 Inner liner
6.1.1 The inner liner may be manufactured by coiling and welding copper plates, forging copper ingots, or extrusion integral forming.
6.1.2 The materials for the inner liner and inner liner flange shall be T2 or TP2 as specified in GB/T 2040-2017. The thickness of the inner liner shall comply with the provisions of Table 3.
6.1.3 The copper plate for the inner liner shall be ultrasonically tested both before and after coiling and welding. Forged or extruded cylindrical shells shall also be ultrasonically tested. The ultrasonic testing quality level shall comply with Class Ⅱ as specified in NB/T 47013.3-2023.
6.1.4 The machined inner liner shall undergo penetrant testing. The penetrant testing quality level shall comply with Class Ⅰ as specified in NB/T 47013.5-2015.
6.1.5 For welded inner liners, the welding wire material shall comply with the provisions of GB/T 9460. The welds shall undergo penetrant testing. The penetrant testing quality level shall comply with Class Ⅰ as specified in NB/T 47013.5-2015. For circular moulds with a nominal weight greater than or equal to 50 t, the inner liner welds shall undergo ultrasonic testing. The ultrasonic testing quality level shall comply with Class Ⅱ as specified in NB/T 47013.3-2023.
GB/T 24444-2026 Electroslag remelting mould English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 24444-2026
Electroslag remelting mould
电渣重熔结晶器
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification, Designation and Marking
4.1 Classification
4.2 Designation
4.3 Marking
5 Specifications and Dimensions
6 Technical Requirements
6.1 Inner Liner
6.2 Outer Casing
6.3 Water Guide Structure
6.4 Welds
6.5 Overall Sealing
7 Test Methods
7.1 Materials
7.2 Welds
7.3 Surface Quality
7.4 Taper
8 Inspection Rules
8.1 Inspection Items
8.2 Conformity Judgement
9 Marking, Accompanying Documents, Packaging, Transport and Storage
9.1 Marking
9.2 Accompanying Documents
9.3 Packaging
9.4 Transport and Storage
Bibliography
Electroslag remelting mould
1 Scope
This document specifies the classification, designation and marking, specifications and dimensions, technical requirements, inspection rules, marking, accompanying documents, packaging, transport and storage for electroslag remelting moulds, and describes the corresponding test methods.
This document applies to the manufacture of electroslag remelting moulds with a nominal weight of 0.03 t to 300 t and circular or rectangular cross sectional shapes.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 700 Carbon structural steels
GB/T 1031-2009 Geometrical product specifications (GPS) — Surface texture: Profile method — Surface roughness parameters and their values
GB/T 1804-2000 General tolerances — Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 2040-2017 Copper and copper alloy sheets and plates
GB/T 4237 Hot rolled stainless steel plate, sheet and strip
GB/T 5121 (all parts) Methods for chemical analysis of copper and copper alloys
GB/T 9460 Copper and copper alloy wires for welding
GB/T 13384 General specifications for packaging of mechanical and electrical products
NB/T 47013.3-2023 Nondestructive testing of pressure equipment — Part 3: Ultrasonic testing
NB/T 47013.5-2015 Nondestructive testing of pressure equipment — Part 5: Penetrant testing
NB/T 47013.7 Nondestructive testing of pressure equipment — Part 7: Visual testing
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 electroslag remelting mould
A water cooled mould used for holding molten slag and molten steel during electroslag remelting.
3.2 nominal weight
The maximum weight of the electroslag remelting ingot that the electroslag remelting mould is designed to hold.
3.3 inner liner nominal diameter
The average value of the large and small diameters of the inner cavity of a circular electroslag remelting mould.
3.4 inner liner nominal width
The average value of the large and small widths of the inner cavity of a rectangular electroslag remelting mould.
3.5 inner liner nominal length
The average value of the large and small lengths of the inner cavity of a rectangular electroslag remelting mould.
3.6 inner liner nominal height
The vertical distance from the large end to the small end of the inner cavity of an electroslag remelting mould.
4 Classification, Designation and Marking
4.1 Classification
Electroslag remelting moulds (hereinafter referred to as “moulds”) are classified by cross sectional shape into circular moulds and rectangular moulds. A schematic diagram of a circular mould is shown in Figure 1, and a schematic diagram of a rectangular mould is shown in Figure 2.
4.2 Designation
The product designation and cross sectional shape code for moulds are as follows:
a) Product designation — DZJ;
b) Circular — A;
c) Rectangular — B.
NOTE: “DZJ” is the initial capital letters of the Chinese Pinyin for “electric”, “slag” and “mould”.
4.3 Marking
The marking method for moulds is as follows:
Example 1: A circular mould with an inner liner nominal diameter of 900 mm, an inner liner nominal height of 2500 mm, and a nominal weight of 9 t is marked as:
Electroslag remelting mould DZJ A 900 2500 9 GB/T 24444 2026
Example 2: A rectangular mould with an inner liner nominal length of 700 mm, an inner liner nominal width of 650 mm, an inner liner nominal height of 2000 mm, and a nominal weight of 5 t is marked as:
Electroslag remelting mould DZJ B 700 × 650 2000 5 GB/T 24444 2026
5 Specifications and Dimensions
5.1 Recommended specifications and dimensions for circular moulds are given in Table 1.
5.2 Recommended specifications and dimensions for rectangular moulds are given in Table 2.
6 Technical Requirements
6.1 Inner liner
6.1.1 The inner liner may be manufactured by coiling and welding copper plates, forging copper ingots, or extrusion integral forming.
6.1.2 The materials for the inner liner and inner liner flange shall be T2 or TP2 as specified in GB/T 2040-2017. The thickness of the inner liner shall comply with the provisions of Table 3.
6.1.3 The copper plate for the inner liner shall be ultrasonically tested both before and after coiling and welding. Forged or extruded cylindrical shells shall also be ultrasonically tested. The ultrasonic testing quality level shall comply with Class Ⅱ as specified in NB/T 47013.3-2023.
6.1.4 The machined inner liner shall undergo penetrant testing. The penetrant testing quality level shall comply with Class Ⅰ as specified in NB/T 47013.5-2015.
6.1.5 For welded inner liners, the welding wire material shall comply with the provisions of GB/T 9460. The welds shall undergo penetrant testing. The penetrant testing quality level shall comply with Class Ⅰ as specified in NB/T 47013.5-2015. For circular moulds with a nominal weight greater than or equal to 50 t, the inner liner welds shall undergo ultrasonic testing. The ultrasonic testing quality level shall comply with Class Ⅱ as specified in NB/T 47013.3-2023.
