Phanuphong Steel and Plates is a trusted and well-established manufacturer and supplier of Carbon Steel Fasteners located in Bangkok, Thailand. With a strong commitment to providing top-notch fastening solutions, the company offers a diverse selection of bolts, nuts, screws, washers, and studs that comply with international standards like ASTM, DIN, and ISO. Built for strength, durability, and resistance to corrosion, these fasteners are perfect for a variety of industrial and structural uses. Thanks to their advanced production facilities, rigorous quality control, and attentive customer service, Phanuphong Steel caters to industries such as construction, automotive, oil & gas, and heavy machinery throughout Thailand and Southeast Asia.
Carbon Steel Fasteners are typically crafted from grades like ASTM A307, A325, or SAE 1010–1045, which contain carbon (0.10%–0.50%), manganese (0.30%–1.65%), and small amounts of sulfur and phosphorus. These fasteners boast impressive mechanical properties, including tensile strength ranging from 400 to 800 MPa, yield strength between 250–600 MPa, and favorable elongation and hardness values that vary with heat treatment. Available in low, medium, and high carbon options, carbon steel fasteners provide choices for strength, weldability, and hardness. Surface treatments such as black oxide, galvanizing, or zinc plating enhance corrosion resistance, making them suitable for different environmental conditions.
| Standard | ASTM A193, A194 / ASME SA193, SA194 |
| Sizes | “1/4 to 4” |
| Length | UPTO 5 METERS |
| Specification | IS, BS, ASTM |
| Type | Bolts, nuts, Washers, Anchor Fasteners, Stud Bolts, Eye Bolt, Stud, Threaded Rod, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, etc. |
|
BS 970: 1955 |
Chemical Composition |
|||||||
|
C % |
Si % |
Mn % |
Ni % |
Cr/strong> % |
Mo % |
S % |
P % |
|
|
EN3B |
0.25Max |
0.35Max |
1.0Max |
– |
– |
– |
0.06Max |
0.06Max |
|
EN1A |
0.07/0.15 |
0.10Max. |
0.80/1.20 |
– |
– |
– |
0.20/0.30 |
0.07Max |
|
EN8 |
0.35/0.45 |
0.05/0.35 |
0.60/1.00 |
– |
– |
– |
0.06Max |
0.06Max |
|
EN9 |
0.50/0.60 |
0.05/0.35 |
0.50/0.80 |
– |
– |
– |
0.06Max |
0.06Max |
|
EN16 |
0.30/0.40 |
0.10/0.35 |
1.30/1.80 |
– |
– |
0.20/0.35 |
0.05Max |
0.05Max |
|
EN19 |
0.35/0.45 |
0.10/0.35 |
0.50/0.80 |
– |
0.90/1.50 |
0.20/0.40 |
0.05Max |
0.05Max |
|
EN24 |
0.35/0.45 |
0.10/0.35 |
0.45/0.70 |
1.30/1.80 |
0.90/1.40 |
0.20/0.35 |
0.05Max |
0.05Max |
| Mechanical Properties ISO 898-1 Bolting | |||||||
|
Grade |
Material |
Size Range |
Tensile Strength MPa min. |
Proof Strength MPa min. |
Core Rockwell Hardness |
Yield Strength MPa min. |
|
|
Min. |
Max. |
||||||
|
4.6 |
Low or Medium Carbon Steel |
M5 – M39 3/16” – 1-1/2” |
400 |
225 |
B67 |
B99.5 |
240 |
|
8.8 |
Medium Carbon Steel Q+T |
M5 – M16 3/16” – 5/8” M18 – M39 11/16” – 1-1/2” |
800 830 |
580 600 |
C22 C23 |
C32 C34 |
640 660 |
|
10.9 |
Alloy Steel Q+T |
M5 – M39 3/16” – 1-1/2” |
1040 |
830 |
C32 |
C39 |
940 |
|
12.9 |
Alloy Steel Q+T |
M1.6 – M39 #0 – 1-1/2” |
1220 |
970 |
C39 |
C44 |
1100 |
| High Temperature Bolting Steels | |||||
|
Grade |
Name |
Werkstoff Number |
ASTM |
BS |
Temperature Use |
|
Durehete 900 T22 |
42CrMo5.6 |
1.7233 |
– |
BS1506 631-850 |
Up to 480ºC |
|
Durehete 950 T31 |
40CrMoV4.6 |
1.7711 |
ASTM A193 B16 |
BS1506 671-850 |
Up to 510ºC |
|
Durehete 1055 T41 |
20CrMoVTiB4.10 |
1.7729 |
– |
BS1506 681-820 |
Up to 570ºC |
|
25CrMo4 |
– |
1.7218 |
– |
– |
Up to 400ºC |
|
21CrMoV5.7 |
– |
1.7709 |
– |
– |
Up to 540ºC |
|
42CrMo4 |
– |
1.7225 |
ASTM A193 B7 |
BS1506 630-860 |
Up to 450ºC |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Phanuphong Steel is one of the most prominent manufacturers and suppliers of superior quality Carbon Steel Fasteners in Bangkok, Thailand. As experts in steel solutions, we supply a complete spectrum of products like Carbon Steel, Alloy Steel, Mild Steel, and Galvanized Steel. Our product range comprises Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets, and Plates. Known for our reliable delivery and first-rate customer service, we are committed to supplying high-quality steel materials that guarantee durability and excellent performance in numerous industrial applications.
Carbon Steel Fasteners find extensive use across various industries due to their strength, cost-effectiveness, and versatility. In construction, they play a crucial role in steel frameworks, bridges, and infrastructure projects. In the automotive and machinery fields, they securely hold components in engines, assemblies, and equipment. They are also vital in oil & gas, power generation, railways, and marine applications, where dependable connections are essential under fluctuating loads and stresses. Offered in a range of sizes, grades, and coatings, carbon steel fasteners are designed to meet diverse needs.
Phanuphong Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Bangkok, Thailand.
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