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 | ✓ | |
| Studding | ✓ | |
| 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 | ✓ | |
| ACME | ✓ | |
| 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 | % |
| Nickel | … | … |
| Molybdenum | 0.15-0.25 | % |
| Copper | … | … |
| Niobium | … | … |
| Titanium | … | … |
| Vanadium | … | … |
| Aluminium | … | … |
| Nitrogen | … | … |
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 |
| AFNOR 42 CD 4 |
| DIN 42Cr Mo4 |
| B.S 1506.621 Gr A |
Not Sure What You Are Looking For?
Quotation / Information Request