Mechanical Properties of Inch Fasteners 美标紧固件对照表

Mechanical Properties of Inch Fasteners

Mechanical Properties of Externally Threaded Fasteners

Specification

Material

Size Range(in.)

SAE J429-Grade 1SAE J429-Grade 2

1/4 - 1 1/2

Low or medium carbon steel

1/4 - 3/47/8 - 1 1/2

Low or medium carbon steel

Min. Proof Strength(psi)33,00055,00033,000

Min. Tensile Strength

(psi)60,00074,00060,000

Core Hardness RockwellMin.B70B80B70

Max.B100B100B100

Min. Yield Strength(psi)36,00057,00036,000

ASTM A563 Grade A (Hex up to 1-1/2 & Heavy Hex 1-1/2

and over)ASTM A563 Grade A Hex

Grade Identification Marking

Compatible Nuts

ASTM A307-Grade A1/4 - 460,000B69B100

ASTM A307-Grade B

Low or medium carbon steel

1/4 - 460,000(min)B69B95

ASTM A563 Grade A Heavy

Hex

SAE J429-Grade 5

1/4 - 1Medium carbon

steel: quenched &

tempered1 1/8 - 1 1/21/4 - 1Medium carbon steel: quenched &

tempered1 1/8 - 1 1/21/4 - 1Medium carbon

steel: quenched & 1 1/8 - 1 1/2

tempered

1 3/4 - 3Medium carbon alloy steel: quenched & temperedMedium carbon alloy steel: quenched & temperedMedium carbon alloy steel: quenched & temperedMedium carbon alloy steel: quenched & temperedMedium carbon boron steel: quenched & temperedMedium carbon alloy steel: quenched & temperedMedium carbon alloy steel: quenched & temperedalloy steel: quenched & temperedLow or medium carbon steel

1/4 - 2-1/2Over 2-1/2

85,00074,00085,00074,00085,00074,00055,000105,00095,000

120,000105,000120,000105,000120,000105,00090,000125,000105,000

C25C19C25C19C25C19

C34C30C34C30C34C30

92,000

SAE J995 Grade 5 Hex

81,00092,00081,00092,00081,00058,000

SAE J995 Grade 5 up to 1-1/2, ASTM A563 Grade A Heavy Hex 1-1/2 & over, DH Heavy

Hex if GalvASTM A563 Grade C Heavy

Hex, DH if Galv

ASTM A325 - Type 1

ASTM A563 Grade C Heavy

Hex, DH if Galv

ASTM A449-Type1

ASTM A354- Grade

BC

C26C22

C36C33

109,00099,000

SAE J429-Grade 81/4 - 1 1/2120,000150,000C33C39130,000SAE J995 Grade 8 Hex

1/4 - 2-1/2Over 2-1/2

120,000105,000

150,000140,000

C33C31

C39C39

130,000115,000

ASTM A354 Grade BD

ASTM A563 Grade DH Heavy

Hex

ASTM A490-Type 11/2 - 1-1/2120,000

150,000 (min) 173,000 (max)

C33C39130,000

ASTM A563 Grade DH Heavy

Hex

SAE J429-Grade 8.21/4 - 1120,000150,000C33C39130,000SAE J995 Grade 8 Hex

FNL Grade 91/4 - 1-1/4140,650180,000C38C42159,500FNL Grade 9 Thick Hex Nut

ASTM A574 Socket Head Cap ScrewButton

& Flat Countersunk Head Cap ScrewASTM F1554 Anchor Bolts, Steel Grade 36Notes

#0 - 1/2over 1/2 - 2#0 - 1/2over 1/2 1/4 - 4-in

140,000135,000

180,000170,000145,000135,00058,000(min) 80,000 (max)

C39C37C39C37

C45C45C44C44

36,000

ASTM A563 Grade A (hex up to 1-1/2 & Heavy Hex 1-1/2

and over)1, 2, 3

153,000

1. Compatible denotes commercially available nut having suitable mechanical properties and dimensional configuration or style which will make it possible to obtain the desired bolt load. Higher strength nuts may be a suitable substitue provided bolt standard allows.

2. Galvanized nuts are intended for use with externally threaded fasteners that are hot-dip or mechanically galvanized or have acoatingof sufficient thicknesstorequireover-tappingofthenut toprovideassembly.3. ASTM A194 2H heavy hex nut may be used in liew as a substitute for ASTM A563 DH heavy hex nut

Mechanical Properties of Inch Fasteners

Mechanical Properties of Internally Threaded Fasteners

SpecificationASTM A563-Grade 0ASTM A563-Grade AASTM A563-Grade A

Heavy Hex

Material

Nominal Size(in.)1/4 - 1 1/2

Proof Load Stress (psi)Plain

69,000*90,000*100,000*90,000**144,000

coating (1)52,000*68,000*75,000*68,000**

Hardness RockwellMin.B55B68B68

Max.C32C32C32

Grade Identification Marking

Carbon Steel

1/4 - 1 1/21/4 - 4

ASTM A563-Grade C may be

Heavy Hexquenched and

ASTM A563-Grade DH Heavy Hex

Carbon Steel, quenched and tempered

1/4 - 4B78C38

1/4 - 4175,000150,000C24C38

Medium

Heavy HexCarbon Steel

1/4 – 1 1/2

175,000

Over 1 1/21/4 – 5/8

C24C35C35

FNL Grade 9 Thick Hex Nut

C32

180,000

C35

C38C40

Carbon Steel

3/4 – 1 1/2

ASTM A194-Grade 8

Heavy Hex

AISI 3041/4 – 1 1/280,000B60C32

Heavy Hex

AISI 3161/4 – 1 1/280,000B60C32

SAE J995 Grade Identification

GradeMaterial

5

8

Proof

Load Stress (psi)1/4 - 4

109,000**

Carbon steel

105,000*

Over 1 – 1 1/2

94,000**

1/4 – 5/8

carbon or

alloy steel, Over 5/8 – 1150,000quenched &

Over 1 – 1 1/2tempered

Nominal Size(in.)

RockwellHardnessMin.Max.

C32C32

C24C26C26

C32C34C36

Grade Identification

Marking

(1): Galvanize coating refers to nuts that have been plated with a plating or coating of sufficient thickness to require overtapping of the nut to provide assembly: for example hot-dip or mechanical galvanizing.* UNC and 8 UN ** UNF, 12 UN & finer

***When a zinc coated A194 2H nut is supplied, the zinc coating, overtapping, lubrication and rotational capacity testing shall be in accordance with ASTM A563 and the proof stress reduced accordingly. Nuts coated with zinc shall have an asterisk “*” marked after the grade symbol. Nuts coated with cadmium shall have a plus sign “+” marked after the grade symbol.

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