ASTM A193 B7 Alaşımlı Çelik Dişli Çubuk

ASTM A193 Grade B7 quenched-and-tempered chromium-molybdenum alloy steel threaded rod for high-pressure, high-temperature and engineered industrial fastening.


Tanım

Quenched-and-tempered Cr-Mo alloy steel

ASTM A193 B7 Alloy Steel Threaded Rod

High-strength continuous threaded bar for pressure equipment, refinery piping, flange joints, supports and engineered fastening assemblies.

Ürüne genel bakış

ASTM A193 Grade B7 threaded rod is manufactured from chromium-molybdenum alloy steel, commonly based on 4140 veya 4142 kimya, and is quenched and tempered to achieve the required mechanical properties. ASTM A193/A193M is intended for high-temperature or high-pressure bolting and other special-purpose applications.

Unlike a finished stud bolt cut to a joint-specific length, threaded rod can be supplied in standard stock lengths or cut to the approved bill of materials. The order should state the governing standard, seviye, çap, iplik serisi, uzunluk, coating and inspection requirements.

High-strength boltingHeat treatment supports demanding pressure and mechanical loads.
Flexible cut lengthsContinuous thread permits project-specific cutting and adjustment.
Coating optionsPlain, black, zinc and fluoropolymer finishes can be reviewed.
İzlenebilir tedarikHeat numbers and EN 10204 documentation can follow each production lot.

ASTM A193 B7 threaded rod specifications

Bolting standard ASTM A193/A193M, ordered edition
Seviye / malzeme Grade B7, chromium-molybdenum alloy steel; commonly 4140/4142 tip
Isıl işlem Quenched and tempered to the ordered specification
Konu sistemleri ASME B1.1 ÇİL, UNF veya 8UN; ASME B1.13M / ISO metric when ordered
Boyut aralığı 1/4–4 in and M6–M100 typical manufacturing range; project review required
Uzunluk Stock or cut-to-length; custom lengths to drawing
Compatible nuts ASTM A194 Grade 2H commonly specified, subject to design requirements
Finish options Plain, black oxide, zinc, hot-dip galvanized or fluoropolymer coating

Son boyutlar, toleranslar, ısıl işlem, kaplama, test ve kabul kriterleri onaylanmış satın alma siparişine ve geçerli standart baskıya uygundur. Kullanılabilirlik çapa bağlıdır, uzunluk, iplik formu ve üretim miktarı.

Bu materyali neden belirtmeniz gerekiyor??

B7 is widely selected where carbon-steel all-thread lacks the required strength or temperature capability. It offers a practical combination of availability, machinability, heat-treatment response and established use in pressure bolting.

Mühendislik notu

Coating selection changes friction and therefore affects torque-to-tension behavior. Confirm lubricant, nut grade, coating system and installation procedure together; do not reuse generic torque values without engineering approval.

Tipik uygulamalar

Petrol ve gazRafineri boruları, skids, valves and pressure equipment
Güç üretimiHigh-temperature supports and auxiliary equipment
Endüstriyel flanşlarCustom-length bolting and maintenance assemblies
Equipment mountingHigh-strength anchors, frames and machinery connections

Kalite, muayene ve dokümantasyon

B7 verification should link starting material, ısıl işlem, mekanik test, hardness and thread inspection to the finished lot. Coated products should retain traceable marking and include coating inspection when specified.

  • EN 10204 3.1 malzeme test sertifikası
  • Isı numarası ve parti izlenebilirliği
  • Kimyasal bileşim ve mekanik özellikler
  • Boyutsal inceleme ve iplik ölçümü
  • Sipariş edildiğinde paslanmaz ve nikel alaşımları için PMI
  • Uygulanabilir olduğunda kaplama kalınlığı veya yüzey incelemesi
  • Anlaşmaya göre üçüncü taraf denetimi ve ek testler
  • İhracat işaretlemesi ve denize uygun ambalaj

Teklif için gerekli bilgiler

  1. Malzeme kalitesi, geçerli malzeme/cıvata standardı ve gerekli sürüm
  2. Çap, iplik serisi, adım ve diş sınıfı veya toleransı
  3. Toplam uzunluk, kesme sonu gereksinimleri ve miktarı
  4. Isıl işlem, yüzey bitirme veya kaplama sistemi
  5. Eşleşen somunlar ve pullar, safra oluşumunu önleyici gereksinimler dahil
  6. Denetim planı, MTC, PMI, NDE ve üçüncü taraf tanık gereklilikleri
  7. Teslimat hedefi, paketleme ve gerekli program

Sık sorulan sorular

What material is ASTM A193 Grade B7?

Grade B7 is a quenched-and-tempered chromium-molybdenum alloy steel commonly produced from 4140 veya 4142 type material. The ASTM grade requirements, not a commercial alloy name alone, control acceptance.

Which nut is used with B7 threaded rod?

ASTM A194 Grade 2H heavy hex nuts are commonly paired with B7 bolting. The final nut grade, style, coating and thread fit must follow the project design.

Can B7 threaded rod be hot-dip galvanized?

Galvanizing can be supplied in suitable sizes when allowed by the project, but thread allowance, nut oversize, coating temperature and hydrogen-related controls require review.

Is B7 the same as B7M?

HAYIR. B7M has additional heat-treatment, hardness and testing requirements intended for controlled-hardness service. The grades should not be substituted without engineering approval.

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Teknik teklif isteyin

Malzeme listenizi gönderin, çizim veya proje özellikleri. SASA FLANGE notu gözden geçirecek, iplik, boyutlar, Teklif öncesi dokümantasyon ve teslimat gereksinimleri.

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