CREUSABRO M
A wear resistant steel
CREUSABRO M is a high Manganese, fully austenitic, quench annealed, non
magnetic, work-hardening steel with an exceptionnally high level of wear resistance
when subjected to work-hardening by shock or high impact pressure in service.
The main characteristics is a superior wear resistance :
Severe wear on the surface has a work-hardening effect on the austenitic structure
of this steel. This, when combined with the level of carbon in accordance with the
international standards, leads to an increase in hardness from 200BHN (in as
delivered plates) up to an in-service hardness of at least 600BHN.
This work-hardening capability renews itself through out in-service life. The
underlayers not work-hardened maintain an excellent resistance to shock and a
very high ductility.
STANDARD AFNOR……………………Z120M12
EURONORM……………...X120Mn12
WERKSTOFF Nbr………..W1.3401
OTHER STANDARD…….."HADFIELD"
ASTM………………………A128Grade B2
CHEMICAL Typical values (% Weight)
ANALYSIS C Si Mn S
1.15 0.40 13 ≤0.002
The grade is processed by usual methods taking into account its special properties
: specifically its aptitude for work-hardening, high coefficient of expansion, and low
PROCESSING* thermal conductivity.
§ Cutting
Thermal cutting : possible using oxy-acetylene with iron powder addition or
improved using plasma or laser cutting which result in a cleaner quality of cut.
Trademark registred under the name of USINOR INDUSTEEL
* ask for detailed brochure
CREUSABRO M - Ed.11.02.2002 – Page 1
Mechanical cutting :
Shearing can be easily achieved with sufficiently powerful machines and freshly
sharpened blades. When crossed cutting is necessary, intermediate local grinding
is required on edges (already work-hardened).
§ Machining
By standard methods allowing for work-hardening : the edges of the tool should bite
beyond the work-hardened zones, necessitating a rigid machine.
§ Drilling using supercarburized cobalt alloy high speed steel bits of HSSCO type
(AFNOR grade 2-9-1-8, AISI grade M42),with reinforced shape, 130° point
angle, long twist, low cutting speed (2-3m/min.), high feed, lubrication using
soluble oils.
The depth of the hole to be drilled should not exceed 3 times the bit diameter.
(Other solutions : 3 nibbed bits with carbide reinforcement, concrete drill bits, hot
drilling).
§ Milling using supercarburized high speed steel tools of HSSCO type (AISI grade
M42) or carbide tipped tools (ISO grade K10) and high feed (as for driling) to bite
beyond work-hardened zones.
Punching is possible on sufficiently powerfult equipment and with tools in good
condition (avoid denting shocks).
§ Forming
Bending and rolling are aeasy : to be performed cold only (at workshop
temperature). Avoid forming directly on zones previously work-hardened, (e.g.
sheared edges), carry out grinding of these areas.
Using standard procedures taking into account : high coefficient of expansion, low
WELDING thermal conductivity, risk of carbide precipitation above 300°C (572°F).
Weld metal :
§ Heterogeneous welds (most common practice) :
For manual arc welding typical deposits recommended are 18Cr8Ni6Mn or
20Cr10Ni3Mo (class A5.4E307 or 5.4E308Mo per AWS).
For semi-automatic welding under gas the same type of deposit is used in
- solid wire – class A5.2ER 307 or A5.9ER 308 Mo per AWS
E E
- coated wire – class A5.22 307T or A5.22 308 Mo T per AWS
§ Homogeneous welds : (work-hardenable deposit)
E
Typical deposit 13Mn3NiMo (class A5.13 FeMn per AWS) for manual welding.
For semi-automatic welding coated wire of similar composition, with or without
protective gas.
General recommendations :
Welding is performed with low heat-input E<20KJ/cm, interpass temperature limited
to ≅ 100°C (212°F) with water cooling, if necessary between each pass. Any
distorsion can be hammered out.
N.B. NEVER PREHEAT
CREUSABRO M - Ed.11.02.2002 – Page 2
Our thickness range is one of the widest available on the word market : 3 to about
DIMENSIONAL 120mm (0.125"-(") and sizes up to 2500 (96") x 8000mm (315").
PROGRAMME
Standard dimensions :
- 1500 X 3000 (60" X 118")
- 2000 X 6000 (79" X 236")
- 2500 X 8000 (96" X 315")
Other dimensions on request.
NOTE :
1. This technical data and information represents our best knowledge at the time of printing. However, it
may be subject to some slight variations due to our ongoing research programme on abrasion resistant
grades.
We therefore suggest that information be verified at time of enquiry or order.
Furthermore, in service, real conditions are specific for each application. The data presented here is
only for the purpose of description, and may only be considered as guarantees when our company has
given written formal approval.
Further information may be obtained from the following address.
2. Creusabro Mn : Application range.
Creusabro Mn has been developped specifically for its abrasion resistance.
Customer's usage of CREUSABRO Mn for any other purposes, not directly resulting from its abrasion
resistance, is his own prerogative but won't, in any way, engage USINOR INDUSTEEL's responsability.
In addition to the recommendations given in this document, Customer will have to follow the Industry
standard quality rules for any processing operation performed on this material.
CREUSABRO M - Ed.11.02.2002 – Page 3
For all information : USINOR INDUSTEEL
56 Rue Clemenceau
71202 LE CREUSOT CEDEX - FRANCE
Sales - Marketing Tel +33 3 85 80 58 04
Fax +33 3 85 80 55 00
Development Tel +33 3 85 80 55 37/51 62
Fax +33 3 85 80 55 00
CREUSABRO M - Ed.11.02.2002 – Page 4
