M00044436
New product
API TR 6MET Metallic Material Limits for Wellhead Equipment Used in High Temperature for API 6A and 17D Applications, First Edition
standard by American Petroleum Institute, 10/01/2010
In stock
Warning: Last items in stock!
Availability date: 01/06/2022
API TECHNICAL REPORT 6MET FIRST EDITION, OCTOBER 2010
API TECHNICAL REPORT 6MET FIRST EDITION, OCTOBER 2010
API publications necessarily address problems of a general nature. With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed.
Neither API nor any of API's employees, subcontractors, consultants, committees, or other assignees make any warranty or representation, either express or implied, with respect to the accuracy, completeness, or usefulness of the information contained herein, or assume any liability or responsibility for any use, or the results of such use, of any information or process disclosed in this publication. Neither API nor any of API's employees, subcontractors, consultants, or other assignees represent that use of this publication would not infringe upon privately owned rights.
API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any authorities having jurisdiction with which this publication may conflict.
API publications are published to facilitate the broad availability of proven, sound engineering and operating practices. These publications are not intended to obviate the need for applying sound engineering judgment regarding when and where these publications should be utilized. The formulation and publication of API publications is not intended in any way to inhibit anyone from using any other practices.
Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable requirements of that standard. API does not represent, warrant, or guarantee that such products do in fact conform to the applicable API standard.
Users of this Technical Report should not rely exclusively on the information contained in this document. Sound busi- ness, scientific, engineering, and safety judgment should be used in employing the information contained herein.
All rights reserved. No part of this work may be reproduced, translated, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher. Contact the Publisher, API Publishing Services, 1220 L Street, NW, Washington, DC 20005.
Copyright © 2010 American Petroleum Institute
Nothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent.
This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard. Questions concerning the interpretation of the content of this publication or comments and questions concerning the procedures under which this publication was developed should be directed in writing to the Director of Standards, American Petroleum Institute, 1220 L Street, NW, Washington, DC 20005. Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.
Suggested revisions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW, Washington, DC 20005, standards@api.org.
iii
Page
v
Page
This API-funded project was conducted by a Task Group charged by the Association of Well Head Equipment Manufacturers (AWHEM). The Task Group examined mechanical properties of metallic materials used for API 6A and API 17D wellhead equipment for service above 250 °F. A total of eleven different alloys meeting API 6A, PSL 3 conditions were supplied “in condition” by a variety of suppliers. Materials in this test program included alloys common to the oil and gas industry. The alloys tested included low alloy steels, martensitic, precipitation hardened and duplex stainless steels, and nickel alloys. Yield strength reduction ratios at temperatures of 300 °F, 350 °F, 400 °F, and 450 °F are reported. As a result of testing, yield strength reduction ratios at 300 °F to 450 °F ranged from 92 % to 87 % for the low alloy steels, 92% to 88% for the martensitic stainless steels 81 % to 73 % for super duplex, 99 % to 89 % for the precipitation hardened stainless steel and 94 % to 89 % for the nickel alloys. The reported results represent an average over the different heats for each type of material. These results are intended to expand the data shown in API 6A, Annex G.
vi
Metallic Material Limits for Wellhead Equipment Used in High Temperature for API 6A and 17D Applications
Testing was performed in three phases, presented herein in chronological order as Phase I, II, and III. Initially, all testing was to be completed in two phases, but testing anomalies in Phase II prompted re-testing of some alloys in Phase III.
Alloy candidates were recommended by AWHEM membership for analysis and confirmed by API’s approval of New Work Item No. 2003-100786 in June 2002. Several material suppliers and several AWHEM member companies donated material for testing. Metallurgists on the Task Group screened material certificates to ensure a “normal” chemistry without enhancements for the material candidates listed in Table 1, Table 2, and Table 3.
Alloy chemistries from the material certificates for each of the supplied alloy candidates are provided in Table 6 through Table 16, located at the end of this report for readability.
Material | Yield Strength Class | Application | Bar Size |
AISI 4130 | 75K | Pressure Containing | 5 in. ER |
AISI 8630 | 75K | Pressure Containing | 5 in. ER |
21/4 Cr 1 Mo | 75K | Pressure Containing | 5 in. ER |
AISI 4140 | 75K | Pressure Containing | 5 in. ER |
AISI 410 SS | 75K | Pressure Containing | 5 in. ER |
F6NM | 75K | Pressure Containing | 5 in. ER |
Material | Yield Strength Class | Application | Material Size |
25 Cr Super Duplex* | 110K | Pressure Containing | 2.4 in. to 5.5 in. OD |
ASTM A453 Gr 660 | 100K | Pressure Retaining | 0.75 in. to 1.5 in. OD |
718 (per Spec 6A718) | 130K | Pressure Containing | 1.25 in. to 8.5 in. OD x 5.5 in. |
725/625 Plus | 130K | Pressure Containing | 0.63 in. to 6.5 in. OD data 9 in.OD test |
925 | 110K | Pressure Containing | 1 in. to 6.5 in. OD |
* Pitting resistance equivalence number, PREN >40. |
Material | Yield Strength | Application | Material Size |
Nickel Alloy 725/625 Plus | 120K | Pressure Containing | 1.25 in. to 6.0 in.OD |
Nickel Alloy 925 | 110K | Pressure Containing | 1.0 in. to 8.7 in. OD |
1