KR Shipbuilding Steel

Gnee offers 36 grades of KR ship calss steel. This shipbuilding steel offers varying degrees of toughness and corrosion resistance. We can provide product certification services, custom cutting services, and guaranteed delivery times.

KR stands for Korea Register of Shipping, a marine classification society based in South Korea. Like NK steel, KR shipbuilding steel refers to specific grades certified by KR for shipbuilding.
The main KR shipbuilding steel grades include:
KR-A – Basic grade for hulls and structures. Good strength and weldability.
KR-D – Higher strength grades for critical structural components. Good weldability.
KR-E – Ultra-high strength grade with some weldability limitations. Used where high strength is critical.
KR-EH/EH36 – High strength steel with guaranteed impact strength at low temperatures for ships operating in cold conditions.
The steel is produced and certified to KR specifications for strength, toughness, weldability and other properties important for ships.

KR A32KR D32KR E32KR F32
KR A36KR D36KR E36KR F36
KR A40KR D40KR E40KR F40
KR A47KR D47KR E47KR F47
KR A51KR D51KR E51KR F51
KR A56KR D56KR E56KR F56
KR A63KR D63KR E63KR F63
KR A70KR D70KR E70KR F70

Thickness: 3 MM – 200 MM

Width: 1220MM – 4200MM

Length: 5000-18000mm

Customize: Available

  • UT (Ultrasonic examination)
  • AR(As Hot Rolled only)
  • TMCP(Thermal Mechanical Control Processing)
  • N(Normalized)
  • Q+T(Quenched and Tempered)
  • Z Direction Test(Z15,Z25,Z35)
  • Charpy V-Notch Impact Test
  • The Third Party Test (such as SGS Test)
  • Coated or Shot Blasting and Painting

Available, welcome to consult

A) Packaging Details: Standard export seaworthy packing or as required.
B) Delivery Time:30-50 days, 7 days for stock goods.
C) Loading Port:Shanghai ,Tianjin, Qingdao.
D) Offer Ability:5000MT/Per Month.
E) MOQ:1 Pcs.

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Provide Various Types Of KR Shipbuilding Steel

Parameters Of Hot Sale KR Shipbuilding Steel

KR  A0.212.5×C0.50.0350.035
KR  B 0.212.5×C0.50.0350.035
KR  D 0.212.5×C0.50.0350.035
KR  E 0.212.5×C0.50.0350.035
KR  A32 0.180.90-1.600.10-0.500.0350.035
KR  A36 0.180.90-1.600.10-0.500.0350.035
KR  A40 0.180.90-1.600.10-0.500.0350.035
KR A47 0.210.551.70.0350.035
KR A51 0.210.551.70.0350.035
KR A56 0.210.551.70.0350.035
KR A63 0.210.551.70.0350.035
KR A70 0.210.551.70.0350.035
KR  D32 0.180.90-1.600.10-0.500.0350.035
KR  D36 0.180.90-1.600.10-0.500.0350.035
KR  D40 0.180.90-1.600.10-0.500.0350.035
KR D470.210.551.70.0350.035
KR D51 0.210.551.70.0350.035
KR D56 0.210.551.70.0350.035
KR D63 0.210.551.70.0350.035
KR D70 0.210.551.70.0350.035
KR  E32 0.180.90-1.600.10-0.500.0350.035
KR  E36 0.180.90-1.600.10-0.500.0350.035
KR  E40 0.180.90-1.600.10-0.500.0350.035
KR E470.210.551.70.0350.035
KR E51 0.210.551.70.0350.035
KR E56 0.210.551.70.0350.035
KR E63 0.210.551.70.0350.035
KR E70 0.210.551.70.0350.035
KR  F32 0.160.90-1.600.10-0.500.0350.035
KR  F36 0.160.90-1.600.10-0.500.0350.035
KR  F40 0.180.90-1.600.10-0.500.0350.035
KR F470.210.551.70.0350.035
KR F51 0.160.551.70.0350.035
KR F56 0.210.551.70.0350.035
KR F63 0.210.551.70.0350.035
KR F70 0.210.551.70.0350.035
GradeTensile Strength(MPa)Yield Strength(MPa)% Elongation in 2 in.(50mm) minImpacting Test  Temperature(°C)
KR  A400-5202352220
KR  B400-520235220
KR  D400-52023522-20
KR  E400-52023522-20
KR  A32440-590315220
KR  A36440-590315220
KR  A40510-650390220
KR A47460570-72017-1920
KR A51500610-77016-180
KR A56500610-77016-180
KR A63620720-89015-170
KR A70690770-94014-160
KR  D32440-59031522-20
KR  D36440-59031522-20
KR  D40510-65039022-20
KR DHQ47460570-72017-19-20
KR D51500610-77016-18-20
KR D56550670-83016-18-20
KR D63620720-89015-17-20
KR D70690770-94014-16-20
KR  E32440-59031522-40
KR  E36440-59031522-40
KR  E40510-65039022-40
KR E47460570-72017-19-40
KR E51500610-77016-18-40
KR E56550670-83016-18-40
KR E63620720-89015-17-40
KR E70690770-94014-16-40
KR  F32440-59031522-40
KR  F36440-59031522-60
KR  F40510-65039022-60
KR F47460570-72017-19-60
KR F51500610-77016-18-60
KR F56550670-83016-18-60
KR F63620720-89015-17-60
KR F70690770-94014-16-60

Why Choose Gnee KR Shipbuilding Steel

If you want to find a trustable KR Shipbuilding Steel manufacturer, Gnee will be your best choice. 15 years of experience KR Shipbuilding Steel manufacturer, certified by the classification society, CE, ISO, and SGS. And we guarantee the highest safety and quality standards. We fulfill all requirements of reputed classification societies.

In addition, our KR Shipbuilding Steel has been successfully exported to more than 60 countries such as Germany, South Korea, the United States, Mexico, and Argentina. Many regular customers come to visit our company and factory and make multiple orders.


What Services Gnee Provide?

Gnee can provide the following measurement services for KR Shipbuilding Steel:

1. Dimensional measurement: Measure the dimensional parameters such as length, width and thickness by measuring instruments to ensure that the steel plate is qualified and meets the design requirements.
2. Surface measurement: Measure parameters such as flatness, unevenness and surface roughness of the steel plate surface to help ensure that the quality and surface state of the steel plate meet the requirements.
3. Thickness measurement: Use a thickness measuring instrument to accurately measure the thickness of the steel plate to ensure that it meets the design requirements.
4. Material measurement: use material analysis instruments to measure the chemical composition and mechanical properties of the steel plate to ensure that the quality and performance of the steel plate meet the requirements.
5. Bending and Deformation Measurements: During shipbuilding, steel plates may undergo bending and deformation. The degree of bending and deformation of the steel plate is measured and monitored by using tools such as bending measuring instruments and displacement sensors to ensure that it is within the allowable range.

Ask Measurement service

Gnee can customize the size and shape of steel plates for your marine project according to your specific project needs. The custom design of the steel plate is carried out by a professional engineer and design team. Based on the requirements and constraints of the project, they will use calculation and simulation tools, combined with experience and technical knowledge, to optimize the steel plate design to meet the specific needs of your offshore engineering.

● According to the load calculation and strength requirements of structural design, adjust the thickness, width and length of shipbuilding steel plates
● The shape of the steel plate can be designed according to the characteristics of the marine environment. For example, in order to reduce the impact of waves on the structure, the shape of the steel plate can be spherical or flat.
● If you consider the convenience of installation and maintenance, we can also add openings and passages for easy access and operation in the design for areas that require frequent maintenance.

Ask Customized Services

Purchasing Gnee KR Shipbuilding Steel can provide the following deep processing services. We can customize according to the specific needs of customers to meet the requirements of different ship engineering.

Cutting service: Shipbuilding steel plates can be custom cut to obtain the desired shape and size according to the needs of customers. For example, flame cutting, plasma cutting, laser cutting, etc., can cut steel plates into required plates, blocks, special-shaped parts, etc.
Bending and forming: Shipbuilding steel plates are bent and formed by stress application and appropriate processes to obtain the desired shape.
Welding services: Shipbuilding steel plates can be subjected to various types of welding services, including manual arc welding, gas shielded welding, laser welding, etc.
Turning and machining of holes: Turning and machining of holes in shipbuilding steel plates by using machining equipment. These processes produce smooth surfaces, precise holes and threads to meet specific assembly requirements.
Surface treatment: In order to improve the corrosion resistance and aesthetics of the steel plate, surface treatment can be carried out. This includes methods such as spraying, hot-dip galvanizing, electroplating, etc. to add a protective layer and provide corrosion resistance.

Ask Deep Processing Services

Gnee KR Shipbuilding Steel can provide the following testing services through third-party testing agencies. These third-party testing services can provide independent, objective verification that shipbuilding steel plates comply with relevant standards and regulations.

Material chemical composition analysis: Through chemical composition analysis, determine whether the composition of the shipbuilding steel plate meets the standard requirements.
Mechanical performance test: mechanical performance test includes tensile test, impact test, bending test, etc., which are used to determine whether the mechanical properties such as strength, toughness and ductility of shipbuilding steel plate meet the specified requirements.
Metallographic testing: Through metallographic testing, check the structure, grain size, non-metallic inclusions, etc. of shipbuilding steel plates to evaluate their quality and performance.
Corrosion performance test: Through the corrosion performance test, evaluate the corrosion resistance of shipbuilding steel plates, including salt spray corrosion resistance, chemical corrosion resistance, etc.
Hardness test: Hardness test is used to measure the hardness of shipbuilding steel plate, and its strength and wear resistance can be evaluated according to the hardness value.
Ultrasonic flaw detection: Ultrasonic flaw detection is used to detect internal defects of shipbuilding steel plates, such as cracks, pores, inclusions, etc.

Ask Deep Processing Services
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Why Choose Gnee Steel

If you want to find a trustable steel products manufacturer, Gnee will be your best choice. 15 years of experience steel products manufacturer, certified by the classification society, CE, ISO, and SGS. And we guarantee the highest safety and quality standards. We fulfill all requirements of reputed classification societies.

In addition, our steel has been successfully exported to more than 60 countries such as Germany, South Korea, the United States, Mexico, and Argentina. Many regular customers come to visit our company and factory and make multiple orders.

Partner Company Display
What Services Does Gnee Provide?
  • Dimensional Inspection: Length, width, diameter; Thickness, straightness; Flatness, profile;
  • Surface Inspection: Visual inspection; Roughness testing; Coating thickness measurement;
  • Composition Testing: Interstitial elemental analysis - C,S,P, Si; Alloy grading verification; Inclusion rating;
  • Mechanical Testing: Tensile strength, yield strength; Toughness, ductility; Hardness testing;
  • Flaw Detection: Ultrasonic, radiographic testing; Magnetic particle, dye penetrant testing;
  • Documentation: Inspection reports; Test certificates; Material traceability
  • CNC machining - turning, milling, drilling
  • Surface treatments like polishing
  • Heat treatments - quenching, annealing
  • Wet/powder coating
  • Waterjet cutting
  • Laser cutting
  • Plasma cutting
  • Shearing/punching
Molding and Manufacturing1
  • Rolling
  • Press braking
  • Plate bending - concave & convex
  • Profile bending -custom fabrication as per drawings
  • Chemical analysis
  • Mechanical testing
  • Non-destructive examination
  • Ultrasonic, radiography testing

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