8/11/2019 Equivalencias Entre Dureza

http://slidepdf.com/reader/full/equivalencias-entre-dureza 1/2

BRITISH STAINLESS STEEL ASSOCIATION

Making the Mos t of Stainless Steel 

HOME CONTACT MEMBERS AREA

Select quick link   enter search term

HOME ABOUT BSSA TECHNICAL HELP FIND A SUPPLIER SHOP NEWS TRAINING EVENTS BSSA MEMBERS CONTACT US

Home Technical Help Technical Library Material Selection Engineering Components

TECHNICAL HELP

About Stainless Steel

FAQ

Technical Library

Special Topics

Technical Enquiries

Publication & Products

Featured Articles & Publications

BSSA Stainless Steel Surface

Finishes Pack

100 Years of Stainless Steel

Book

Stay Bright - A History of

Stainless Steels in Britain by

David Dulieu

BSSA Understanding

Stainless Steel - Centenary

Edition

BSSA Guide to Stainless

Steel Specifications - 2010

Edition

 Availability of Stainless Steel

Grades

Getting the Best out of

Stainless Steel

Special Grades of Stainless

Steel - Where to Find Them

Duplex Stainless Steels - A

Simplified Guide

Fabricating Duplex Stainless

Steel

Importance of Surface Finish

in the Design of Stainless

Steel

More Than Just Scratching

the Surface - A Practical

 Approach to Surface Finish

The Then and Now of

Electropolishing

Structural Sections inStainless Steel

Stainless steel fasteners

European Standards -

Referenced Standards for

Stainless Steel Products

European EN Standard Grade

Summary

Stainless Steel Grades

Datasheets

Hardness test methods and hardness conversion tables

Introduction

Hardness is a surface property where indentation, scratching or wear is resisted.The higher the hardness the more resistant the surface and the more difficult surface operations such as cutting andmachining are.Testing the hardness of steels can be used an indication of how they can be manipulated (formed, machined etc.) and howthey will perform mechanically.

Hardness test methods

Common tests for hardness in metals involve measuring the resistance to indentation by a hardened steel or diamond ball,cone or pyramid.

The common test methods include: -

Brinell

Vickers

Rockwell

The hardness figures do not have units. They are an index, based on either the cross-section of the indentation made,measured after the test, or the depth of indentor travel into the metal surface.The hardness figure is followed by a code indicating the test method.

The Brinell and Vickers methods have been used historically in the UK, the Brinell method for softened steels and Vickersmethod for either softened or hardened steels.In these tests the 'diameter' of the impression is measured.

The Rockwell method was first introduced in the US.These methods assess the hardness by measuring the depth of indentor penetration.

The B scale is used for softened steels and the C scale for hardened steels.Other scales are also available. These include scales A, D, E, F, G H, K, as well as 'superficial test' scales HR15N, HR30N,HR45N (cone indentor) and HR15T, HR30T, HR45T (ball indentor).Normally the B and C scales are used on stainless steels, B for softened steel and C for hardened steel.

Hardness conversions between different scales

There are several hardness scale conversion systems, including BS 860 and ASTM E140.The table shows a set of values that has been used for stainless steels and also includes a tensile strength (UTS)comparison. The Rockwell B values are superimposed on this table using an approximation from ASTM E140 Table5, whichcompares Rockwell B and Brinell.

Comparison tables should only be used as a guide. The figures shown are not equivalents and BSSA accepts noresponsibility of the accuracy of the data. In any case of doubt or dispute values using the actual test methods should beused rather than converted table values.

Hardness conversion table

Brinell Hardness (HB) Vickers Hardness (HV) Rockwell (HRB) Rockwell (HRC) UTS (N/mm2)

- 640 - 57 -

- 615 - 56 -

- 591 - 54.5 -

- 569 - 53.5 -

- 547 - 52 -

- 528 - 51 -

- 508 - 49.5 -

- 491 - 48.5 1539

444 474 - 47 1520

429 455 - 45.5 1471

415 440 - 44.5 1422

401 425 - 43 1363

388 410 - 42 1314

375 396 - 40.5 1265

363 383 - 39 1236

352 372 - 38 1187

341 360 - 36.5 1157

331 350 - 35.5 1118

321 339 - 34.5 1089

311 328 - 33 1049

302 319 - 32 1020

293 309 - 31 990

285 301 - 30 971

Página 1 de 2Article: Hardness test methods and hardness conversion tables

20/08/2014http://www.bssa.org.uk/topics.php?article=97

8/11/2019 Equivalencias Entre Dureza

http://slidepdf.com/reader/full/equivalencias-entre-dureza 2/2

Stainless Steel Datasheets for

Tubular Products

 Adhesive Bonding of Stainless

Steel

Selection of stainless steels

for the food processing

industries

Stainless Steel Pipe

FabricationStainless Steel in Indoor

Swimming Pool Buildings

277 292 - 29 941

269 284 - 27.5 912

262 276 - 26.5 892

255 269 100 25.5 873

248 261 99 24 853

241 253 98 23 824

235 247 97 22 794

229 241 96 20.5 775

223 235 - - 755

217 228 95 - 745

212 223 94 - 716

207 218 93 - 696

197 208 91 - 667

187 197 89 - 637

179 189 87 - 608

170 179 85 - 559

163 172 83 - 539

156 165 81 - 530

149 157 79 - 500

143 150 77 - 481

137 144 74 - 471

131 138 72 - 461

126 133 69 - 451

121 127 67 - 431

116 122 64 - 422

111 117 61 - 402

107 113 - - 382

103 108 - - 373

Other sources of hardness equivalent tables are:

Corrosion Source

Carbide Depot

Gordon England

top

Site Map Terms & Conditions Members Area Cookie Policy

Office and Postal Address: BSSA, Park Suite, Forsyth Enterprise Centre, Bramall Lane, Sheffield S2 4SURegistered Office: Pegasus House, 463A Glossop Road, Sheffield S10 2QDTel: +44 (0)114 292 2636 | Fax: +44 (0)114 292 2633 | Email: admin@bssa.org.uk

Copyright © 2014 British Stainless Steel Association

web design sheffield by Llama Digital

Página 2 de 2Article: Hardness test methods and hardness conversion tables

20/08/2014http://www.bssa.org.uk/topics.php?article=97