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Våre ASTM A193 B7M dobbelendete studbolter er fremstilt av Cr-Mo legert stål og varmebehandlet for å oppfylle de strenge kravene i NACE MR0175 / MR0103 for sur (H₂S) tjeneste. Hver stud er sammen med en A194 klasse 2HM tung sekskantmutter, spesielt konstruert for motstand mot sulfidspenningskorrosjonssprekker (SSC) i sure miljøer.

Denne kombinasjonen er standardspesifikasjonen for bolting i olje- og gassraffinerier, kjemiske prosessanlegg og høytemperatur trykkbeholderapplikasjoner der standard B7 / 2H-fester ikke er tillatt på grunn av hardhetsgrenser.

Standard: ASTM A193/A193M, ASTM A194/A194M, ASME B18.2.2

Materiale: A193 Gr. B7M (stud) + A194 Gr. 2HM (mutter)

Type: Dobbelendet stud, fullgjengd stud, tung sekskantmutter

Gjenge: UNC, 8UN, Grad 2A (stud) / 2B (mutter)

Størrelsesområde: Imperial 1/4" – 4" | Metrisk M6 – M100

Temperaturområde: -29°C til 538°C (-20°F til 1000°F)

SSC-motstand: Ja - i samsvar med NACE MR0175 / MR0103

C: 0,38–0,48 | Mn: 0,75–1,00 | P: ≤0,035 | S: ≤0,040

Si: 0,15–0,35 | Cr: 0,80–1,15 | Mo: 0,15–0,25

C: ≥0,15 | Mn: ≤1,00 | P: ≤0,04 | S: ≤0,05 | Si: ≤0,40

B7M Stud:

Min. Strekkfasthet: 100 KSI (689 MPa)

Min. Flytegrense: 80 KSI (551 MPa)

Forlengelse: ≥18%

Hardhet: HB 197–235 (maks 235)

Varmebehandling: Bråkjølt og herdet

2HM Mutter:

Prøvelast: 150 KSI (1034 MPa)

Hardhet: HB 159–237

Varmebehandling: Bråkjølt og herdet

B7M-kvaliteten er en lavhardhetsvariant av B7, spesielt designet for miljøer der sulfidspenningskorrosjonssprekker (SSC) er en risiko:

Hver ordre inkluderer materials porbarhet sertifisert i henhold til ASTM-spesifikasjoner. Vi leverer mølleprøverapporter (MTR) med kjemisk sammensetning, mekaniske egenskaper og varmebehandlingsjournaler. Vårt anlegg er utstyrt med Brinell-hardhetstestere, strekktestmaskiner og slagprøver for intern kvalitetsverifisering.

Be om et tilbud eller still et teknisk spørsmål om ASTM A193 B7M studbolter med A194 2HM muttere. Vi sender verden over med full materials porbarhet.

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ASTM A193 B7M Dobbelendet Stud

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