Mechanical Properties of Inch Fasteners 美标紧固件对照表(3)

Mechanical Properties of Inch Fasteners

ASTM A193: Alloy Steel and Stainless Steel Bolting Materials for High-Temperature Service

Specification &

Grade

Size Range

(in.)2 1/2 & under

ASTM A193 B7

Over 2 1/2 - 4Over 4 – 7 4 & underOver 4 - 72 1/2 & under

ASTM A193 B16

Over 2 1/2 - 4Over 4 - 8

Min. Tensile Strength

(psi)125,000115,000100,000100,000100,000125,000110,000100,000

Min. Yield Strength(psi)105,00095,00075,00080,00075,000105,00095,00085,000

Core Hardness Rockwell(max)C35C35C35B99B99C35C35C35

Similar to B7 except heat-treated to limit the maximum hardness. Considered in areas where stress embrittlement may be a factor.

Grade 2HM

A chromium-Molybdenum-Vanadium alloy used for high-pressure, high-temperature service applications. Offers slightly higher

temperature resistance than B7.Chromium-Molybdenum alloy (4140, 4142, 4145, 4140H, 4142H, 4145H) used for high-pressure, high-temperature applications.

Grade 2H

Description

Grade Identification Marking

Compatible ASTM A194 Heavy Hex Nut

ASTM A193

B7M

Grade 4

ASTM A193 B8

Class 1

1/4 & larger75,00030,000B96

A 304 Stainless Steel used for high temperature applications. This material has

been carbide solution treated.

Grade 8

A 316 Stainless Steel used for high temperature applications. This material has

been carbide solution treated.

Grade 8M

ASTM A193 B8M Class 1

1/4 & larger75,00030,000B96

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 or nuts of equal strength may be a suitable substitute provided bolt standard allows.

Mechanical Properties of Common Stainless Steel Fasteners in Accordance with ASTM F593

Stainless Alloy Condition

Group

1

(304, 304L, 305, 384, 18-9LW, 302HQ)

3/4 - 1 1/2

CW

Nominal Dia.(in.)1/4 - 5/8

Tensile Strength (psi)100,000 -

150,000

Core Hardness Rockwell

Min.B95

Max.C32

Min. Yield Strength(psi)65,000

Grade Identification Marking

85,000 -

140,000

B80C3245,000

(316, 316L)

150,000

3/4 - 1 1/285,000 -

140,000

B80C3245,000

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