Esperanto
Shqiptare
Euskara
Zulu
Latinus
Cymraeg
தமிழ்
Slovak
Slovak
Afrikaans
PRODUCTS
Product Categories
ASTM A449 Hex Bolts
Item No.：
A-005
Category：
Summary
We passed the ISO9001:2000 quality management system certification in 2019, and organized and trained an elite team of professional production, inspection, sales and distribution.
Tel: +86-574-86520006
E-mail: info@nbasme.com，sales@nbasme.com
Description
ASTM A449
ASTM A449 specification covers quenched and tempered steel hex head screws, bolts and studs from 1/4 inch to 3 inch inclusive. It is suitable for general engineering use. These fasteners are quenched and tempered during production. And they regardless of the steel used, shall be tempered by reheating to not less than 800°F.
A449 Type
|
|
Type 1 |
Plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel |
|
Type 2 |
Withdrawn 2003 |
|
|
Type 3 |
Weathering steel |
A449 Mechanical Properties
|
Size in. |
Tensile Strength, psi |
Yield Strength, psi |
Elongation in 4D, % |
Reduction of Area, % |
|
min |
min |
min |
min |
|
|
1⁄4 - 1 |
120 000 |
92 000 |
14 |
35 |
|
1 - 1-1⁄2 |
105 000 |
81 000 |
14 |
35 |
|
1-1⁄2 - 3 |
90 000 |
58 000 |
14 |
35 |
A449 Chemical Properties
|
Type 1 Fasteners Heat Analysis(%) |
||||
|
Element |
Carbon Steel |
Boron Steel |
Alloy Steel |
Alloy Boron Steel |
|
Carbon |
0.30 - 0.52 |
0.30 - 0.52 |
0.30 - 0.52 |
0.30 - 0.52 |
|
Manganese, min |
0.60 |
0.60 |
0.60 |
0.60 |
|
Phosphorus, max |
0.040 |
0.040 |
0.035 |
0.035 |
|
Sulfur, max |
0.050 |
0.050 |
0.040 |
0.040 |
|
Silicon |
0.15 - 0.30 |
0.10 - 0.30 |
0.15 - 0.35 |
0.15 - 0.35 |
|
Boron |
- |
0.0005 - 0.003 |
- |
0.0005 - 0.003 |
|
Alloying Elements |
- |
- |
a |
a |
a Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the maximum of the range given for the content of alloying elements exceeds one or more of the following limits: manganese, 1.65 %; silicon, 0.60 %; copper, 0.60 % or in which a definite range or a definite minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels: aluminum, chromium up to 3.99 %, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium, or any other alloying elements added to obtain a desired alloying effect.
|
Type 3 Fasteners Heat Analysis(%) |
||||||
|
Element |
A |
B |
C |
D |
E |
F |
|
Carbon |
0.33 - 0.40 |
0.38 - 0.48 |
0.15 - 0.25 |
0.15 - 0.25 |
0.20 - 0.25 |
0.20 - 0.25 |
|
Manganese |
0.90 - 1.20 |
0.70 - 0.90 |
0.80 - 1.35 |
0.40 - 1.20 |
0.60 - 1.00 |
0.90 - 1.20 |
|
Phosphorus |
0.035 max |
0.06 - 0.12 |
0.035 max |
0.035 max |
0.035 max |
0.035 max |
|
Sulfur |
0.040 max |
0. 040 max |
0. 040 max |
0. 040 max |
0. 040 max |
0. 040 max |
|
Silicon |
0.15 - 0.35 |
0.30 - 0.50 |
0.15 - 0.35 |
0.25 - 0.50 |
0.15 - 0.35 |
0.15 - 0.35 |
|
Copper |
0.25 - 0.45 |
0.20 - 0.40 |
0.20 - 0.50 |
0.30 - 0.50 |
0.30 - 0.60 |
0.20 - 0.40 |
|
Nickel |
0.25 - 0.45 |
0.50 - 0.80 |
0.25 - 0.50 |
0.50 - 0.80 |
0.30 - 0.60 |
0.20 - 0.40 |
|
Chromium |
0.45 - 0.65 |
0.50 - 0.75 |
0.30 - 0.05 |
0.50 - 1.00 |
0.60 - 0.90 |
0.45 - 0.65 |
|
Vanadium |
- |
|
0.020 min |
|
|
|
|
Molybdenum |
- |
0.06 max |
|
0.10 max |
|
|
|
Titanium |
- |
|
|
0.05 max |
|
|
Selection of a class shall be at the option of our factory
A449 Hardness Requirements
|
Size(inch) |
Length, inch |
Brinell |
Rockwell C |
||
|
Min |
Max |
Min |
Max |
||
|
1⁄4 to 1 |
Less than 2D* |
253 |
319 |
25 |
34 |
|
2D and over |
- |
319 |
- |
34 |
|
|
Over 1 to 1-1⁄2 |
Less than 3D* |
223 |
286 |
19 |
30 |
|
3D and over |
- |
286 |
- |
30 |
|
|
Over 1-1⁄2 to 3 |
Less than 3D* |
183 |
235 |
- |
- |
|
3D and over |
- |
235 |
- |
- |
|
* Hex cap screws and bolts larger than 1.00 in. diameter and shorter than 3D and all studs shorter than 3D are subject only to minimum and maximum hardness.
D = Nominal diameter or thread size
A449 Recommended Nuts&Washers
|
Nuts |
Washers |
||
|
1/4 to 1-1/2 in. plain |
Over 1-1/2 to 3 in. plain |
1/4 to 3 in. |
F436 |
|
ASTM A536B Hex |
ASTM A536A Heavy Hex |
ASTM A563DH Heavy Hex |
|
About Us
Every employee of Ningbo ASME Fasteners is a part of our factory. In this big family, there are technical personnel, packaging personnel, testing personnel, accounting personnel, sales personnel, and purchasing personnel. We trust each other and work together. We always say: "Always believe that something wonderful is about to happen", so we always move forward. After more than 20 years of production, trade and development, most of the employees in our factory have bought cars and houses, and their lives are getting better and better. Like our factory, they will develop to a better future. This is the mutual benefit and win-win situation in life.
Online Message
Thank you for your attention to us. If you have any needs or comments,please leave us a message.
SERVICE HOTLINE:
Address：No. 100, Tianshen Road, Tiangu Industrial Zone, Jiulonghu Town, Zhenhai District, Ningbo, Zhejiang, China.
M.T.：+86-18967865853
TEL：+86-574-86520006
E-mail：info@nbasme.com，sales@nbasme.com
+86-18967865853
+86-574-86520006
info@nbasme.com
sales@nbasme.com
Copyright © 2023 Ningbo ASME Fastener Co., Ltd. All rights reserved. Powered by www.300.cn SEO License