Mechanical Requirements for Stainless Steel & Non-Ferrous Fasteners

Transcription

1 Mechanical Requirements for Steel & Non-Ferrous Fasteners Grade(1 ) General Descriptio n of Material Bolts, Screws and Studs Full Size Bolts, Screws, Studs Yield (2) Strengt h Min Tensile Strengt h Min Machine Test Sprecimens of Bolts, Screws, Studs Yield (2) Strengt h Min Tensile Strengt h Min Elong- ation(3 ) % Min. Hardnes s Rockwel l Nuts Proof Load Stress Hardnes s Rockwel l Min Min 33A 34-A 34 3, 75, 3, 75, 2 B75 75, B75 3, 75, 3, 75, 2 B75 75, B75

2 34-SH Strain 15 C25 C2 35-A 35 3, 75, 3, 75, 2 B7 75, B7 35-SH Strain 15 C25 C2 316-A 316 3, 75, 3, 75, 2 B7 75, B7 316-SH 15 C25 C2

3 XM7-A XM7 384-A 384 Strain Martensitic 3, 75, 3, 75, 2 B7 75, B7 3, 75, 3, 75, 2 B7 75, B7 41-H and 95, 125, 95, 125, 2 C22 125, C22 Tempered 41-HT Martensitic 135, 18, 135, 18, 12 C36 18, C36

4 and Tempered Martensitic 416-H and 95, 125, 95, 125, 2 C22 125, C22 Tempered Martensitic 416-HT and 135, 18, 135, 18, 12 C36 18, C HF Tempered Ferritic Steel Naval Brass Naval Brass Naval Brass Aluminum Aluminum Aluminum 4, 7, 4, 7, 2 B75 7, B75 15, 52, 14, 5, 25 B56 52, B56 27, 6, 25, 57, 25 B65 6, B65 27, 52, 24, 5, 2 B65 52, B65 35, 72, 35, 72, 15 B75 72, B75 5, 15, 5, 15, 1 B9 15, B9 4, 75, 4, 75, 3 B7 75, B7 51 Phosphor 35, 6, 35, 6, 15 B6 6, B6

5 HF NICU- A-HF NICU-A NICU-B NICU- K(7) Manganese Silicon Silicon Silicon Silicon Nickel- Copper Alloy A Nickel- Copper Alloy A Nickel- Copper Alloy B Nickel- Copper Aluminum Alloy 224-T4 Aluminum Alloy 661-T6 Aluminum Alloy 22, 55, 22, 55, 2 B6 55, B6 2, 52, 18,5 5, 2 B6 52, B6 38, 7, 36, 68, 15 B75 7, B75 45, 75, 42,5 72, 8 B75 75, B75 38, 7, 38, 7, 15 B75 7, B75 25, 7, 25, 7, 2 B7 7, B7 4, 8, 4, 8, 2 B8 8, B8 4, 8, 4, 8, 2 B8 8, B8 9, 13, 9, 13, 2 C24 13, C24 4, 55, 4, 55, 14 B7 55, B7 35, 42, 35, 42, 12 B5 42, B5. stainless, strain hardened bolts, screws, studs, and nuts shall have the following strength per properties. Bolts, Screws, Studs Product Size Nuts Tested Full Size Machine Test Specimens, Proof Yield Tensile Yield Tensile Load Stress

6 in. min min to 5/8 in. 1, 125, 9, 115, 125, over 5/8 to 1 in. 7, 15, 65, 1, 15, over 1 to 1-1/2 in. 5, 9, 45, 85, 9, min min Bolt Grade Markings and Chart US Hex bolts Hex bolts A bolt with a six sided head Zinc plated Zinc plated grade 5 Zinc plated grade 8 yellow Grade 8 plain finish Chrome plated Hot dipped galvanized Nylon 6/6 US Tap bolts Bolts Tap bolts A full thread bolt with a six sided head Zinc plated Zinc plated grade 5 Silicon bronze Nylon 6/6 US Structural bolts A325 Bolts Structural bolts A325 The most common type of bolt used in structural connections offering a larger diameter hex head. Steel plain finish Hot dipped galvanized Head Marking No Markings Grade and Material Grade 2 Low or medium carbon Grade 5 Nominal Size Range (inches) 1/4" thru 3/4" Over 3/4" thru 1-1/2" Proof Load () Mechanical Properties Min. Yield () 55, 57, 74, 33, 36, 6, Min. Tensile () 1/4" thru 1" 85, 92, 12, 3 Radial Lines Medium carbon, quenched and tempered Over 1" thru 1-1/2" 74, 81, 15,

7 Grade 8 6 Radial Lines markings vary. Most stainless is non-magnetic Metric Bolts Medium carbon alloy, quenched and tempered Grade A325 Carbon or Alloy Steel with or without Boron 18-8 Steel alloy with 17-19% Chromium and 8-13% Nickel 1/4" thru 1-1/2" 1/2" thru 1-1/2" All Sizes thru 1" 12, 13, 15, 85, 92, 12, 2, Min. 65, Typical 65, Min. 1, 15, Typical Metric Hex Bolts Metric hex bolts Metric hex bolt Hex bolts A bolt with a six sided head (A-2) 316 (A- 4) Zinc plated class 8.8 Zinc plated class 1.9 Chrome plated Head Marking Metric Thread Tap bolts Bolts Metric full thread tap bolt Tap bolts A full thread bolt with a six sided head (A-2) 316 (A- 4) Zinc plated class 8.8 Zinc plated class 1.9 Class 1.9 plain finish Class and Material Metric JIS Hex Bolts Metric JIS hex bolt JIS Hex bolts These bolts have smaller heads that meet the old JIS specification. Available only in diameters where there is a difference in head size. Zinc plated class 8.8 Nominal Size Range (mm) Proof Load Metric JIS Full Thread Tap Bolts Metric JIS full thread tap bolts JIS Tap bolts These bolts have smaller heads that meet the old JIS specification. Available only in diameters where there is a difference in head size. Zinc plated class 8.8 Mechanical Properties Min. Yield Min. Tensile

8 markings vary. Most stainless is non-magnetic. Usually stamped A-2. Class 8.8 Medium carbon, quenched and tempered Class 1.9 Alloy, quenched and tempered Class 12.9 Alloy, quenched and tempered A-2 Steel alloy with 17-19% chromium and 8-13% nickel All Sizes below 16mm 16mm - 72mm 5mm - 1mm 1.6mm - 1mm All Sizes thru 2mm (MPa) (MPa) (MPa) Min. 45 Typical 5 Min. 7 Typical Tensile : The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. Yield : The maximum load at which a material exhibits a specific permanent deformation Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set. 1MPa = 1N/mm 2 = 145 pounds/inch 2 Website: info@raajsagars.com inquiry@raajsagars.com