ASTM A193 B7

We reliably offer commercial grade ASTM A193 B7, to meet even the most demanding of requirements.

Description of Material

ASTM A193 B7 is an alloy steel used throughout the Oil and Gas industry, for general connections including valves, flanges and fittings in general and high-pressure applications piping applications. Using AISI 4140 base material in a quenched and tempered condition to achieve the below mechanical properties.

LoneStar Fasteners Europe offer ASTM A193 B7 in commercial grades, covering the basic requirements of ASTM A193, but can also offer with supplementary and additional requirements of the standard or client preference to international accredited certification bodies such as API 20E BSL 1/2/3 or OEM specific additional requirements.

ASTM A193 B7: Forms

  LoneStar Manufacture 
Stud Bolts
Hexagon Headed Bolting
Socket Headed Bolting
Double Ended and Waisted Studs
Associated OEM Parts

ASTM A193 B7: Sizes and Threads 

  LoneStar Manufacture 
Metric Coarse
Metric Fine
Imperial UNC
Imperial 8UN
Imperial UNF
Metric sizes available Up to M100
Imperial sizes available Up to 6.00″

ASTM A193 B7: Chemical Composition

Carbon 0.38-0.48
Manganese 0.75-1.00
Phosphorus 0.035 % Max
Sulphur 0.04 % Max
Silicon 0.15-0.35
Chromium 0.80-1.10 %
Molybdenum 0.15-0.25 %

ASTM A193 B7: Mechanical Properties

2.1/2″ and under 125 105 16 50 35 HRC Over 2.1/2″ to 4″ 115 95 16 50 35 HRC
Tensile Strength Min, Ksi 125 115
Yield Strength  min, 0.2% offset Ksi 10 95
Elongation in min% 16 16
Reduction of Area min% 50 50
Hardness Max 35 HRC 35HRC

Similar or Equivalent Standards 

AISI 4142
DIN 42Cr Mo4
B.S 1506.621 Gr A


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