RBI Analysis

Group

Material (A), (B), (C)

1

1. All carbon and low alloy steel bars, plates and structural shapes not otherwise listed in this table.

2. SA-216: Grades WCC and WCB, and SA - 217: Grade WC6, if they are water-quenched or normalized, and tempered.

3. Obsolete material specifications: A7, A10, A30, A70, A113, A149, A150 (D).

4. Obsolete 1934 ASME Code, Section VIII material specifications: S1, S2, S25, S26, and S27 (E).

5. Steel made using A201 and A212 specifications unless it can be established that the steel was produced by a fine-grain practice (F).

2

1. SA-216: Grade WCA if water-quenched or normalized, and tempered.

SA-216: Grades WCB and WCC if water-quenched and tempered, produced to a fine grain practice and the thickness does not exceed 2 inches.

SA-217: Grade WC9 if tempered and normalized

SA-285: Grades A and B and SA-414: Grade A

SA-442: Grade 55 if normalized, not produced using a fine grain particle and is > 1 inch thick

SA-442: Grade 60 if it is normalized and not produced using a fine grain practice

SA-515: Grades 55 and 60

SA-516: Grades 65 and 70, SA-612 and SA-662: Grade B if not normalized

2. All materials from Group 1 that are produced using a fine grain practice and are normalized and are not listed in Groups 3 and 4 below. This does not apply for cast steels.

3. All fittings, forgings, pipes and tubing not listed in Groups 3 and 4 below.

4. If the parts were fabricated using the guidelines from paragraph UG-11, Section VIII, Division 1 of the ASME Code must be included in this group, regardless of which group they should otherwise be in.

5. Steel made using A201 and A212 specifications if it can be established that the steel was produced by a fine-grain practice.

3

1. SA-182: Grades 21 and 22, SA-336: Grades F21 and F22, and SA-387: Grades 21 and 22,  if tempered and normalized

SA-302: Grades C and D

SA-442: Grades 55 < 1 in. if normalized and not produced using a fine grain practice

SA-516: Grades 55 and 60 if not normalized

SA-533: Grades B and C, SA-662: Grade A

2. All material of Group 2 if normalized and produced to fine grain practice and not listed in Group 4 below.

4

SA-203

SA-442, if normalized and produced using a fine grain practice

SA-508: Class 1

SA-516, SA 612 and SA 662 if normalized

SA-524 and SA 537: Classes 1 and 2

SA-738: Grade A

Notes:

1. When a material sub-classification is not shown, all sub-classifications of the material are included.

2. For all material assignment notes:

   1. As permitted by the material specifications, all cooling rates faster than those by air, followed by tempering, are considered to be equal to tempering and normalizing heat treatments.

   2. As described in SA-20, the production to fine grain practice is the necessary procedures for obtaining a fine austenitic grain size.

3. Unless specific information to the contrary is available, all product forms containing materials made using obsolete specifications for pipes, tubes, castings, forgings and bars should be assigned to Group 1.

4. Discontinued in 1956, the API Code for Unfired Pressure Vessels, 1st edition, included these ASTM specifications for carbon steel plates, which were intended to be used for structural steel for locomotives, bridges and rail cars. Additional uses included locomotive and stationary service boilers and firebox steel. The A149 and A150 ASTM codes were designed for pressure vessels containing high-tensile-strength carbon steel plates.

5. The S1 and S2 forge welding, S26 and S27 carbon steel plates and S25 open-hearth iron standards were included in Section VIII of the 1934 edition of the ASME Code for steel specifications and the titles of some of these specifications are similar to those ASTM specifications given in the API Code for Unfired Pressure Vessels, 1934 edition.

6. The four grades included in the ASTM A 515 and the four grades included in the ASTM 516 specifications replaced the A201 and A212 steels. In addition, steel that was made using the ASTM A 212 specification was made in strength grades equivalent to Grades 65 and 70, which have accounted for several know brittle failures. Unless it can be established that the steel was enhanced in toughness properties using the fine grain practice production method, steel made using the ASTM A 201 and A 212 specifications should be assigned to Group 1.