ASTM International

EVALUATION OF THE ELEVATED TEMPERATURE TENSILE AND CREEP-RUPTURE PROPERTIES OF 3 TO 9 PERCENT CHROMIUM-MOLYBDENUM STEELS
 N DS58

Annotation

INTRODUCTION

The evaluations presented herein represent another in a series of reports prepared under the sponsorship of The Metal Properties Council (MPC) in the interests of providing engineering design information. Included in the present evaluations are 6 grades of chromium-molybdenum steel ranging from 3 percent to 9 percent chromium, and 1/2 to 1 percent molybdenum. All are recognized for boiler and pressure vessel usage.

The tabular data, charts and the results of the evaluations for the six grades have been grouped separately as follows :

Part 1: 3 Cr – 1 Mo steels

Part 2: 5 Cr - Mo steels

Part 3: 5 Cr – Mo-So steels

Part 4: 5 Cr – Mo-Ti steels

Part 5: 7 Cr – Mo steels

Part 6: 9 Cr – 1 Mo steels

The data that are evaluated include both data previously published in ASTM's DS Data Series Publications, (1,2) and hitherto unpublished data gathered by MPC from cooperating industrial organizations. Data representing different product forms, plate, bar, pipe, tube, forging and casting are included; however, for some grades, the number of data representing certain product forms was limited or completely lacking. Data for weld metal have been included, but are very limited in number; data for weldments have not been included, owing to the dependence of their behavior upon unstandardized specific test details, e.g., the relative fractions of base metal, weld metal and heat-affected- zone encompassed.