• Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

chiusura estiva dal 6 al 24 agosto compresi

F91 (ASTM A182)

 

F91 (X10CrMoVNb9-1), IS AN ALLOY STEEL WITH CHROME AND AN ADDITION OF NB, WHICH HAS ELEVATED MECHANICAL CHARACTERISTICS AND IT IS VERY OFTEN USED IN THE CHEMICAL AND PETROCHEMICAL INDUSTRIES FOR THE FABRICATION OF FLANGES, VALVES, TUBES AND FOR EQUIPMENTS THAT REQUIRE AN EXCELLENT CREEP RESISTANCE AND TO EMBRITTLEMENT BECAUSE OF HYDROGEN UNDER PRESSURE AND AT AN ELEVATED TEMPERATURE (UP TO 600°C).

CORRESPONDENCE TO INTERNATIONAL DESIGNATIONS

QUALITY EUROPE GERMANY FRANCE SPAIN G.B. USA
EN DIN W.n. AFNOR UNE B.S. ASTM
F91 X10CrMoVNb9-1 X10CrMoVNb9-1 1,4903 - - - ASTM A182 F91
ASME SA 182

CHEMICAL ANALYSIS

C Mn Si P
max
S
max
Cr Ni
max
Mo Zr
max
Al N Nb V
0,08 ÷ 0,12 0,30 ÷ 0,60 0,20 ÷ 0,50 0,020 0,010 8,00 ÷ 9,50 0,40 0,85 ÷ 1,05 0,01 0,020 0,03 ÷ 0,07 0,06 ÷ 0,10 0,10 ÷ 0,25

CONCENTRATION LIMITS OF THE ELEMENTS THAT ARE NOT INDICATED IN THE TABLE CAN BE DEDUCED IN THE EN 10020 REGULATION.

MECHANICAL CHARACTERISTICS

STEEL NORMALISATION TEMPERATURE 900°C MIN – TEMPERING TEMPERATURE 620°C MIN
SYMBOLIC Re min Rm min  A min Z min Durezza HB
N/mm2 % % max
F91 415 620 20 40 190÷248

USUALLY AVAILABLE EX STOCK

M.T. COLORATION QUALITY HEAT TREATMENT SURFACE DIAMETER (mm)
F91 Normalised and stress relieved rolled peeled / forged turned 30-400
F91 Annealed rolled 30-220

 

 
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Steels

Our steel always comes from the same European steelworks, which guarantee a continuity for what concerns quality. The constant quality of the supplies allows to have repetitive parameters in mechanical processing and a greater control over deformations during heat treatment.

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Machining

Precise cuttings of small and big series are guaranteed by the employement of latest generation automatic saws that were projected and realized in order to guarantee precision standards required by customers, reducing processing wastage.

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Quality

The certification and introduction of the Quality System management allowed M.T.Acciai to improve not only its efficiency, but also the quality that is offered, in order to better meet our customers’ needs.

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