Specifications Rev A.pdf

The only official copy of this file is the one on-line on the Superconducting Magnet Division website. Before using a printed copy, verify that it is the most current version by checking the document issue date on the website.

Magnet Division Specification

Specification Number: SMD-EIC-RD2007

Revision: Revision A

Procurement Specification, Magnet Steel for EIC IR Magnet Yoke Laminations

▫ Prepared By:

Chris Runyan - Cognizant Engineer

▫ Approved By:

J. Cozzolino – Mechanical Engineer

M. Anerella – Mechanical Engineering Section Head

R. Gupta – Cognizant Scientist

H. Witte – L4, EIC Magnet R&D

Q. Wu – L3, EIC Magnet R&D

M. Blaskiewicz – L2, EIC Magnet R&D

H. Hocker – Quality Assurance Representative, Magnet Division

Revision History Revision A 8/23/23

Superconducting Magnet Division

DocuSign Envelope ID: 6ECB46E5-84A1-4769-AA45-4B4F096B2391

8/24/2023

8/25/2023

8/25/2023

8/25/2023

9/5/2023

9/5/2023

9/5/2023

9/5/2023 the document issue date on the website.

SMD-EIC-RD2007A

1 Scope:

1.1 This specification covers the requirements for extra low carbon, hot-rolled electrical steel used for superconducting magnet yoke laminations. The material will be used at a cryogenic operating temperature near 4.5K with magnetic induction in the range of 0.05T to 6T.

2 Applicable Documents:

The following documents of the issue in effect on the date of invitation to quote form a part of this specification to the extent specified herein.

ASTM E18 Standard Test Methods for Rockwell Hardness

ASTM A596 Standard Test Methods for D.C. magnetic properties of materials using ring test procedures and the ballistic methods.

EN 10029 Hot-rolled steel plates 3 mm thick or above – Tolerances on dimensions and shape

FED. SPEC. TT-C-490 Cleaning Methods and Pretreatment of Ferrous Surfaces for Organic Coatings

3 Requirements:

Extra low carbon electrical steel sheet offered by the Seller under this specification number shall meet the following physical properties and inspection and test requirements.

3.1 Chemical Properties:

Chemical Composition %

Carbon 0.01 max Manganese 0.04 - 0.1 Phosphorus 0.01 max Sulfur 0.008 max Silicon 0.05 max Aluminum 0.08 max Nitrogen 0.008 max

Total of all other impurities not to exceed 0.2% the document issue date on the website.

3.2 Mechanical and Physical Properties:

3.2.1 Hardness: Rockwell B20-50 determined per ASTM E18. Rockwell B hardness shall not vary by more than 10 points in any given plate.

3.3 Magnetic Properties: Reproducible magnetic properties at both high and low fields is desired. The material should be processed to optimize its magnetic properties.

Reproducible low coercive force, high permeability in the low induction region and reproducible intrinsic saturation induction are the desired magnetic properties.

3.3.1 Coercive Force: The coercive force (Hc) of the material shall be measured after it is excited by a magnetic force of 100 Oersted. No value of Hc shall differ from the average value of Hc over the entire production run by more than 0.25 Oersted, and no value of Hc shall exceed

2.3 Oersted.

3.3.2 Permeability, Low Field: The permeability at a magnetizing force of 1 Oersted shall be greater than 500.

3.3.3 Saturation Magnetization: A high and very uniform saturation magnetization is necessary.

Since variation in saturation magnetization is caused mainly by variations in impurity content, strict impurity limits as stated in paragraph 3.1 are required.

3.4 Dimensions, Surface Quality, and Material Characteristics:

3.4.1 Material Thickness: 2.00”

3.4.2 Permissible variations: As per the standard tolerance for EN 10029 Class C hot-rolled steel plates.

3.4.3 Surface Quality (General): The surface shall be free from pits, seams, rust, scale marks, laminations, die breaks and other injurious defects which due to their nature, degree, or extent, will interfere with the use of the material.

3.4.4 Edges: Minimal burr.

the document issue date on the website.

4 Quality Assurance Provisions:

Quality Assurance requirements are listed below. Additional requirements are imposed in the BSA supplied statement of work applicable to the specific order.

4.1 BNL does not grant the Seller material review authority to accept as-is items that do not conform to the requirements of this procurement, or to repair items to a still nonconforming condition.

4.2 Responsibility for the performance of the following inspections, test and data requirements rests with the material manufacturer. Unless otherwise specified, each heat of finished material shall be subjected to the following inspections and tests.

4.2.1 Chemical Composition: A determination of the material conformity with the requirements of

3.1, Chemical Composition.

4.2.2 Mechanical Properties: A determination of the material conformity to:

Material Thickness: 3.4.1 - 3.4.2 (Each Sheet)

Rockwell Hardness: Paragraph 3.2.1

4.2.3 Magnetic Properties: A determination of material conformity to:

Coercive Force: Paragraph 3.3.1

Permeability, Low Field: Paragraph 3.3.2

Permeability, High Field: Paragraph 3.3.3

Upon the request of BSA, the Seller shall furnish a B-H table which includes magnetic measurements acquired within the range of 1 oersted to 3000 oersted inclusively.

5 Preparation for Delivery:

5.1 Finished Material shall be sized, packed, and shipped IAW written information supplied by

BSA at the time of order placement.

5.2 Shipped Items shall be identified with at least the following data. Marking labels shall be applied so they are visible on the top surface.

BSA P.O. No.

Manufacturer's Name

Heat No(s)

Gross Weight (lb.)

Net Weight (lb.)

Tare Weight (lb.)

5.3 Wrap individual items in rust inhibiting paper, packed with desiccants and covered with the document issue date on the website.

plastic for protection. Securely band to pallets.

Procurement Specification, Magnet Steel for EIC IR Magnet Yoke Laminations