UCS-66 Curve - PV Elite - Help - Hexagon

Select one of the following:

• Curve A - D - UCS-66 curves

• Impact Tested - AM 218.1 impact test exemption curve

• Not a Carbon Steel

By default, the material database selects the non-normalized curve. Select Is the Material Normalized? or click Normalized to use the normalized curve for ASME material. Adjust the curve if you are using normalized material produced to fine grain practice.

The following is from Section VIII Division 1, Figure UCS-66, ed. 2011a Addenda:

1. Material Curve A

   1. All carbon and all low alloy steel plates, structural shapes, and bars not listed in Curves B, C, and D below.

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

2. Material Curve B

   1. SA-216 Grade WCA if normalized and tempered or water-quenched and tempered
      SA-216 Grades WCB and WCC for thicknesses not exceeding 2 in. (50 mm), if produced to fine grain practice and water-quenched and tempered.
      SA-217 Grade WC9 if normalized and tempered
      SA 285 Grades A and B
      SA 414 Grade A
      SA-515 Grade 60
      SA-516 Grades 65 and 70 if not normalized
      SA-612 if not normalized
      SA/EN Grade B if not normalized
      SA/EN 10028-2 Grades P235GH, P265GH, and P295GH as rolled
      SA/AS 1548 Grades PT430NR and PT460NR

   2. Except for cast steels, all materials of Curve A if produced to fine grain practice and normalized which are not listed in Curves C and D below;

   3. All pipe, fittings, forgings, and tubing not listed for Curves C and D below;

   4. Parts permitted under UG-11 shall be included in Curve B even when fabricated from plate that otherwise would be assigned to a different curve.

3. Material Curve C

   1. SA 182 Grades 21 and 22 if normalized and tempered
      SA 302 Grades C and D
      SA 336 Grades F21 and F22 if normalized and tempered, or liquid-quenched and tempered
      SA 387 Grades 21 and 22 if normalized and tempered, or liquid-quenched and tempered
      SA 442 Grades 55 <= 1 in. if not to fine grain practice and normalized
      SA 516 Grades 55 and 60 if not normalized
      SA 533 Grades B and C SA 662 Grade A

   2. All materials listed in 2(a) and 2(c) or Curve B if produced to fine grain practice and normalized, normalized and tempered, or liquid-quenched and tempered as permitted in the material specification, and not listed for Curve D below.

4. Material Curve D

   SA 203

   SA 508 Grade 1

   SA 516 if normalized, or quenched and tempered

   SA 524 Classes 1 and 2

   SA 537 Classes 1, 2, and 3

   SA 612 if normalized

   SA 662 if normalized

   SA 738 Grade A

   SA 738 Grade A with Cb and V deliberately added in accordance with the provisions of the material specification, not colder than -20ºF (-29ºC)

   SA 738 Grade B not colder than -20ºF (-29ºC)

   SA/AS 1548 Grades PT430N and PT460N

   SA/EN 10028-2 Grades P235GH, P265GH, and P295GH if normalized

   SA/EN 10028-3 Grade P275NH

Impact Test Exempted

If you are using an impact-tested material when no MDMT calculations are required, select Impact Tested Material.