ASTM A193 Grade B7M bolts and studs are identical in chemical composition to Grade B7 (quenched and tempered medium carbon alloy steel), but have lower strength requirements and require 100% hardness testing of all fasteners manufactured in the batch.

Grade B7 terbuat dari campuran logam chromium-molybdenum yang diberikan heat treatment untuk mendapatkan kekuatan yang diinginkan. Grade B7 ini banyak digunakan di konstruksi, minyak dan gas (migas), dll. Biasanya dihot dip galvanis atau dilapiskan PTFE. Untuk stud bolt atau baut Grade B7 menggunakan mur atau hex nut A194 2H. ASTM A193 Grade B7M

2025年2月14日 · ASTM A193 Grade B7M. B7M contains similar compositions to B7. However, B7 has lower strength and requires testing to all kind of fasteners (e.g., stud bolts and bolts) rather than sampling. Grade B7M can withstand environments with chlorine, sulfides, and hydrogen. For B7M stud bolts or bolts, 2HM nuts are used.

2014年10月27日 · What is the difference between A193 Grade B7 & A193 Grade B7M? Several ASTM specifications are followed by an “M” that denotes it being an equivalent metric standard. The Portland Bolt Bracket Challenge is on!

Grade B7M is a heat-treated chromium-molybdenum alloy steel with minimum tensile requirement of 100 ksi, yield of 75 ksi and maximum hardness of 99 HRB. ASTM A193 specification covers requirements for chemical composition, mechanical properties, hardness, heat-treatment, recommended nuts-washrs for Grade B7M fasteners.

2025年2月14日 · ASTM A193 adalah standar untuk baut, mur, dan stud bolt yang terbuat dari baja atau stainless steel, digunakan pada flange, valve, dan tangki yang beroperasi di lingkungan bersuhu tinggi, bertekanan tinggi, atau aplikasi khusus lainnya. Beberapa grade dalam standar ini meliputi B7, B8, B7M, dan lainnya. ASTM A193 Grade B7

2024年9月26日 · In this blog, we’ll dive deep into what makes B7M bolts essential for industries like oil and gas, chemical processing, and petrochemical. What are B7M Bolts? B7M bolts are made from chromium-molybdenum steel and fall under the ASTM A193 specification. Unlike their B7 counterparts, B7M bolts are designed with a lower hardness, making them ...

2016年2月19日 · B7M bolts for High Temperature and/or High Pressure service are modified in our tempering furnace to meet the ASTM A193 /A193M – B7M standard for bolting covering both metric and inch bolting products.

2025年2月20日 · Explore the ASTM A193 Grade B7 bolts and fasteners, their composition, mechanical properties, manufacturing process, applications, and best practices for selection and maintenance in high-temperature and high-pressure environments.

ASTM A193 B7 is a Bolting specification for medium-high temperature applications. It is a heat treated Chromium Molybdenum steel and is considered for applications up to 450°C (840°F). ASTM A320 L7 has the same chemical and physical properties as B7, with additional Charpy V Notch tests taken at -101°C (-150°F) for low temperature applications.