ASTM F912 Alloy Steel Socket Set Screws
ASTM F912 - 11(2017)
Standard Specification for Alloy Steel Socket Set Screws
ASTM F912 specification covers the requirements and corresponding test methods for quenched and tempered alloy steel socket set screws (SSS) having sizes of M1.6 through M24, hardnesses of 45 to 53 HRC, and belonging to ISO 898/5 property class 45H. These set screws are intended for compression applications only and are not customarily subjected to embrittlement tests. ASTM F912 screws shall be fabricated to a fine grain practice in standard surface finishes, and optional protective coating as specified in the purchase order. Sampled specimens shall undergo heat and product analysis for measurements of the chemical content for carbon, phosphorus, and sulfur. Appropriate tests shall also be performed to analyze the conformance of the screws to mechanical and other property requirements such as torque and torsional strength, microhardness, decarburization, and surface discontinuities.
ASTM F912 Screws can be used for many different applications that include fastening wood, steel, and other construction materials for projects such as docks, bridges, highway structures, and buildings. ASTM F912 Set Screws and ASTM F912 Self Drilling Screws is some of the toughest fasteners. These ASTM F912 sturdy fasteners are used to connect heavy materials.
ASTM F912 Specification
| ASTM F912 Screws Type | Self Drilling Screws, Self Tapping Screws, Thread Rolling Screws, Thread Cutting Screws, Machine Screws, Concrete Screws, Roofing Screws, Drywall Screws, Particle Board Screws, Chipboard Screws, Construction screws, Coach screws / Lag screws, Wood Screws, Euro Screws, Collated Screws, Furniture Screws, Sems Screws, Thumb & Wing Screws, Cap Screws, Socket Head Cap Screws, Allen Cap Screws, Phillips Head Screws, Set Screws, Metric Set screws, Sheet Metal screws, Eye screws, Security head screws |
|---|---|
| Material | Brass, Bronze / Copper Base Alloy, Copper, Molybdenum, Steel, Hardened Steel, Stainless Steel, Superalloy (Inconel, 718 Bolts, Hastelloy, Monel), Titanium, Exotic Metals, Other |
| Dimensions | ASME B18.6.3 **Exception: screws 6 inches and shorter are fully threaded. |
| Method | Cold forming, Hot Forging, Wire Forming |
| Screw Drive Types | Combination, Hex/Hexagonal, Phillips, Six Lobe, Slotted, Socket, Square, Tamper Resistant, Torx. We can manufacture many custom drive types to your specification |
| Specialized in | Stainless steel CSK philip screw, CSK socket screw, Pan head Ph screw, Pan head socket screw, Socket cap head screw, set screw, Pan head torx screw, CSK head trox screw, Wood screw |
| Application Industries & uses | Agriculture, Automotive, Construction and Infrastructure, Energy, Transportation |
| Testing Methods | ASTM E38, E76 and E354, ASTM E53, E54, E62, E75and E478, ASTM E34, E101 and E227, ASTM E 120 and E1409. |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Thread Diameters | M6 to M36 |
| Certification | Dual Certified As per ASTM & ASME Codes |
| Current Export Markets | North America; South America; Western Europe; Eastern Europe; Eastern Asia; Southeast Asia; Mid East; Africa; Oceania; Worldwide |
ASME SF912 Nuts stockist in India- ASME, DIN, AS, BS
ASTM F912 Screws Coatings and plating as well as plain finished oil and tempered is available as required by the end user such as Zinc plating, Cadmium plating, Xylan ® coating, Dupont Teflon ® coating, Hot Dip Galvanized coating, Auge Antifrix ® coating, Sermagard ® coating and Niwat 1000 ® plating.
ASTM F912 Chemical Composition
Element |
Composition, % |
|
Heat Analysis |
Product Analysis |
|
|
||
Carbon |
0.30 to 0.48 |
0.28 to 0.50 |
Phosphorus, max |
0.035 |
0.040 |
Sulfur, max |
0.040 |
0.045 |
NOTE 1 - Plus alloys in accordance with 5.2.
ASTM F912 Mechanical Properties
Torsional Strength Requirements
| Nominal Size | Shortest Nominal Screw Lengths Subject to Torque Testing for | Test Torque | ||
|---|---|---|---|---|
| Cup and Flat Points | Cone and Oval Points | Half Dog Points | in. -lb., min | |
0 (0.060) |
0.109 |
0.125 |
0.109 |
1.1 |
1 (0.073) |
0.125 |
0.141 |
0.125 |
2.1 |
2 (0.086) |
0.125 |
0.141 |
0.141 |
2.1 |
3 (0.099) |
0.141 |
0.156 |
0.156 |
6.0 |
4 (0.112) |
0.141 |
0.172 |
0.156 |
6.0 |
5 (0.125) |
0.156 |
0.188 |
0.172 |
11 |
6 (0.138) |
0.172 |
0.203 |
0.188 |
11 |
8 (0.164) |
0.188 |
0.219 |
0.203 |
23 |
10 (0.190) |
0.188 |
0.250 |
0.234 |
40 |
1/4 (0.250) |
0.250 |
0.312 |
0.297 |
94 |
5/16 (0.312) |
0.312 |
0.391 |
0.359 |
183 |
3/8 (0.375) |
0.375 |
0.438 |
0.438 |
317 |
7/16 (0.437) |
0.438 |
0.547 |
0.484 |
502 |
1/2 (0.500) |
0.500 |
0.609 |
0.547 |
750 |
5/8 (0.625) |
0.625 |
0.766 |
0.672 |
1,460 |
3/4 (0.750) |
0.750 |
0.906 |
0.797 |
2,520 |
7/8 (0.875) |
0.875 |
1.125 |
0.984 |
5,750 |
1 (1.000) |
1.000 |
1.266 |
1.125 |
8,000 |
1-1/8 (1.125) |
1.125 |
1.391 |
1.188 |
8,000 |
1-1/4 (1.250) |
1.250 |
1.500 |
1.312 |
11,000 |
1-3/8 (1.375) |
1.375 |
1.656 |
1.438 |
11,000 |
1-1/2 (1.500) |
1.500 |
1.797 |
1.562 |
18,100 |
1-3/4 (1.750) |
1.750 |
2.219 |
1.953 |
38,000 |
2 (2.000) |
2.000 |
2.391 |
2.078 |
38,000 |
1. Scope
1.1 ASTM F912 specification covers the requirements for quenched and tempered alloy steel socket-set screws (SSS) in nominal diameters 0.060 through 2 in. having hardnesses 45 to 53 HRC.
1.2 These set screws are intended for compression applications only and are not customarily subjected to embrittlement tests. For tensile applications, consult with the manufacturer for proper alloy and hardness.
1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
NOTE 1: A complete metric companion to Specification F912 has been developed—F912M; therefore, no metric equivalents are shown in this Specification.
1.4 The hazard statement pertains only to the test method section, Section 11 of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
from astm.org
