BS steel suppliers and stockholders delivering to the whole of the UK. suppliers of BS specifications in round bar, flat bar and steel plate. BS steel. to BS Part 1: Specification for wrought steels for mechanical and allied engineering purposes. Part 1. General inspection and. BS standard is one steel specification for wrought steel for mechanical and allied engineering purposes. You have free BS standard pdf file here.
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BS Incorporating. Amendment Nos. 1 and 2. Specification for. Wrought steel for mechanical and allied engineering purposes —. Part 3: Bright bars. BS - Download as PDF File .pdf), Text File .txt) or read online. BS steels - Download as PDF File .pdf), Text File .txt) or read online.
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Steels for case-hardening shall be killed. Steels for forgings and drop forgings shall be killed unless otherwise agreed and stated on the order. NOTE 1 Other methods for the determination of grain size may be used by agreement, see also note 1 to 1.
NOTE 2 Where conformance with a specific impact test is required, fine grain steel will normally be supplied. Steels supplied to hardenability requirements are supplied fine-grained and if coarse grain steel is specifically required, then the hardenability shall be subject to negotiation.
However, in cases of dispute it should conform to BS NOTE 2 Grain sizes finer than 8 may be permitted by agreement. NOTE 3 Micro-alloyed steels are not subject to grain size control. NOTE 1 Other ranges can be supplied by agreement between the downloadr and the supplier. NOTE 2 These ranges should be used when it is considered desirable to minimize the adverse effect which low sulfur content can have on machinability.
NOTE Where, in exceptional cases, the downloadr requires a steel of other than standard composition, this should be agreed at the time of the enquiry and order.
For alloy steels, the sulfur content shall be 0. NOTE Where specifically ordered, a lower content of sulfur and phosphorus, with each element at 0. Other limits for sulfur and phosphorus may be agreed between the downloadr and the supplier and stated on the order. These shall be agreed between downloadr and supplier and stated on the order. Molybdenum Niobium Titanium Copper 0.
In the absence of this agreement it shall be not less than 0.
NOTE If requested by the downloadr, the distribution may be checked by either a lead print, lead exudation test or by ultrasonic methods, the details for which should be agreed between the downloadr and the supplier. The results of the analysis of these samples shall fall within the permitted variations.
If any of these further samples are proved to be outside the permitted variations for any specified element, the consignment shall be deemed not to conform to the requirements of this Part of BS The supplier shall endorse the invoice, delivery document, or appropriate certificate to indicate that lead has been added to conform to the specified requirement, and the steel shall be identifiable by a distinguishing mark agreed between the downloadr and the supplier.
Products intended for applications such as upset forging, cold heading or cold forging may require a higher degree of freedom from surface imperfection which shall be agreed between the downloadr and the supplier. Surface conditioning need only be such as to remove harmful defects taking into account the machining allowance. NOTE Machining allowances less than these may be agreed between the downloadr and the supplier.
Table 3 shows the variations permitted in product analysis in relation to cross-sections not greater than 65 mm2. The table only applies to fully killed steels and not to rimmed or balanced steels. Except in the case of stainless steels, it does not apply to resulfurized free-cutting steel with respect to the elements sulfur and phosphorus. The variations may occur either above or below the individual element ranges but shall not apply both above and below the specified range for any one element in any one cast of steel.
Material supplied to these conditions may not be suitable for the applications covered by 1. NOTE The surfaces of bars for induction hardening may be required to be free from decarburization and they will usually be turned or ground.
If supplied in the black condition, overall grinding or turning may be permitted to clear decarburization, if necessary. The softening treatment may be omitted if free cooling of the product from hot working does not lead to the formation of carbide precipitates or sigma or other detrimental phases and if it conforms to the requirements for the mechanical and intercrystalline corrosion tests.
Variation on specified range Over max. Under min.
Subject to the requirements of 1. For the purpose of subsequent orders, these tests shall be taken as representing all sizes of material from the same cast where the ruling section of the forgings or parts does not exceed the ruling section of the test bar already tested. Unless otherwise agreed, the prolongation shall have a diameter approximately equal to the ruling section of the forging or drop forging at the time of heat treatment and it shall not be finally severed until after heat treatment.
In such cases, the properties obtained are representative of those parts heat treated in the same ruling section as that of the test piece and may not represent larger ruling sections. Test bars shall be given the representative heat treatment for the parts concerned.
These shall be provided from the bars or billets from which the forgings, drop forgings or parts are made, or may be additional forgings, drop forgings or parts. The number of tests shall be agreed between the downloadr and the supplier. Where integral test samples are required and it is not practicable to take tests in a longitudinal direction, tests may be taken in an alternative direction and the properties obtained shall be subject to agreement between the downloadr and the supplier see 1.
NOTE 1 For carbon and carbon manganese steels, 13 mm or 29 mm diameter test bar may be used by agreement see 1.
C and ? After cooling to room temperature, they shall be reheated to the single quenching temperature, as stated in Table 9 and quenched in oil. This test bar shall also be of sufficient size to ensure the complete removal of carburization in machining to the standard test piece of 25 mm diameter.
NOTE The properties specified in section 4 apply only to ruling sections equivalent to the preferred test bars. When components of different ruling section are carburized and heat treated, different core properties will be obtained. Similarly, it may be necessary to agree mechanical properties when the test sample size is less than the specified test bar sizes.
Attention is also drawn to the influence of several factors such as steel composition, ruling section and heat treatment, on the hardness of the case. For example, even if a low core strength suffices it will be necessary to use an alloy steel for acceptable case hardenability of the largest section sizes.
If specified and agreed at the time of enquiry and order, one intercrystalline corrosion test shall be carried out per cast per heat treatment batch on the product having the largest equivalent diameter in the batch. For the yield strength Re of non-austenitic steels, the following properties shall be determined for acceptance purposes unless otherwise agreed. Either the upper yield stress, ReH, or the 0. If either value satisfies the value of the yield strength Re, then the material is deemed acceptable.
In cases of dispute, the 0. When specifically ordered and permitted by the material specification, the 0. For austenitic steels, the 0. The 1. The choice shall be made by the supplier.
This test shall be carried out in accordance with BS EN This test shall be carried out in accordance with BS The average value of the results obtained for three notches shall conform to the relevant requirements of the material specification. NOTE It is not possible to convert values from one type of impact test to the other.
NOTE Considerable caution should be exercised when converting from one hardness scale to another and in cases of dispute the Brinell hardness test shall be used. The values to be verified shall be selected by the downloadr in accordance with BS These are for guidance only. NOTE Other methods may be used by agreement between the downloadr and the supplier, see 1.
A bend test piece shall be prepared and tested in accordance with BS However, if any test sample or test piece fails to conform to the requirements of 1. Should any of the retests fail, the material represented shall be deemed not to conform to the requirements of this Part of BS The average value of the six tests shall be not less than the specified value.
Should the results obtained from such tensile test pieces conform to the tensile test requirements of the specification, then the material shall be deemed to conform to this Part of BS Failing this, the batch represented by the original tests may be reheat treated and resubmitted for testing. He shall be at liberty to inspect the manufacture at any stage and to witness the required tests.
The document supplied shall state the steelmaking and casting process and, when requested, the reduction from the as-cast state see 1. Material in the as-cast condition is not covered by this Part of BS Other methods for the determmation ot grain size may be used by agreement see also note I to Steels supplied LV.
Analysis of the product may vary frofn the specified cast analysis due to heterogeneity arising during solidification If requested by t. Where specifically ordered! IUr and phosphorus I compoait. UbU Oe SUpplled For alloy steels. The table only applies to fully Killed steels arld not to rimmed or balanced steels This is recommended for certain alloy nitriding. If required Carbon and carbon manganese steels Alloy steels I 0.
Thble 3 Sl10WS tIle variations JI downloadr and supplier and stated on the order. SUIIur ranges. Other ranges can he supplied by agreement I the CartHJH and carbon Other limits for sulfur and phosphorus rnay be agreed between the purcha. Thble I content can have on macrunamnty J"OTE Table General In the conrnnon stated Products intended for applications such as upset forgirlg cold heading or cold forging may require a higher degree of freedom fronl surface imperfection which shall be agreed between the pu..
Surface conditioning need only be such as to remove composition Section Machining allowances less than these may be agreed between the downloadr and the supplier.. The results of the analysis of these samples shall fall within the permitted variations. Ully -: If suppiied in the black condition overall grinding or turning may be permitted to clear decarburization..
I Carbonl: Permitted variations of product arm-lysis from specified of specified element ranilF range Under min JU "j.. BS Part 1. L -i'. Section 1 1. YV'Il h.. Tl1e softening treatment may be omitted if free rorl. Je CllrOmitlITl. Under min. When range is specified 0. V 'J rti Permitted Element 'variations of product analysis from specified of specified element range continu.
Part 1 Table 3. For the purpose of subsequent orders. Where the ruling section of the material does not differ appreciably from that of the forging or parts 8 Copyright by the British Standards Institution Mon Jan 30 In such cases Permitted varratrons of product analysis from specified range Variation on specified range Under min IOn and heat treatment These shall be provided from the bars or billets from which the forgillgs.
When components of differe: F r alloy steels with a tensile strength or greater.. Oile test sample sh When transverse tests or tests in other directions are required.. LL lr Similarly it may be i1f'cessar: For example See 1.
J Number of grain size tests 1: Number of hardenahiltty 2 Subject to i.. J [Hill diameter steels. TIle nUITtber of tests shall be agreed between th.. This test shall be carried out to i in accordance with BS J.. It is not possible to convert values from onE' type of irrtpact test to the other.
In cases of dispute It shall be sensitized by IIt'dl. If either value satisfies the value of the yield strengt E"'I iV Le specified h. Considerable caution should be exercised when converting from one hardness scale to another and in cases of dispute thp BrineH hardness test shall be used If specified an A bend test piece shall be prepared and tested in accordance with BS JtJ ball and a load of kg..
These are for guidance only.
Either one or other of the following tests shall be carried out.. The vaJu.. The average value of tIle results obtained for three notches shall conform to the relevant requirements of the ITtaterial specificaticlH..
Graphs for the comparison of the various given in annex A.. So may be used One individual value may be belovl the specified value TIle document supplied shall state t.. He shall be at liberty to inspect the manufacture at arLY stage and to witness the required tests..
Values not conrorrrung to the speCIfIed requirements. Ul lel. Should any of the retests fail. Tile releva.. Failing this. If required by the order. If this marking is required it shall be stated the enquiry and order see also NOTE 2. Since the analysis of the steel necessary to attain the specified: TIle chemical cornpositiorL and rnecharlical properties shall be as given in tame 4.
BS For requirements section U20 max Specific requirements for steels for suface hardening by rutnumg shall be as given in table 6. Categor-y 1 steels shou. No Weld Softened S20 No Weld S20 The second and third number indicate the sulphur content x Silicon M anganese valve steels to Stainless and heat resisting steels to Alloy Steels b The fourth symbol is a letter code.
The number represents the manganese content x to Free cutting steels. A The steel is supplied to a chemical compostion determine by analysis of the batch sample. H The steel is supplied to a hardenability specification M The steel is supplied to a M echanical Property specification. S The steel is a stainless steel c The fifth and sixth symbol is a number is the actual mean carbon content x In addition to the above coding a condition coding may be applied.
This is used in conjunction with a limiting section designation. Aust 1. M art 13Cr C 0. Valve 13CrC0. M art 1. Valve 1. Casti M etals Black Book..
Fer 17Cr 2. M art CrNiSi Contains physical and mechanical properties Key-To-Steel. Notes On Steels Grade Alternatives. A comprehensive reference text on european metals including Ref to latest Standards.. British Stainless Steel Association Download Document.. An excellent reference site for steel classifications and properties.
BS steels Uploaded by Tamal Guha. Flag for inappropriate content. Related titles. Jump to Page. Search inside document. BS steels..
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