Jiaxing City Qunbang Hardware Co., Ltd
| Payment Terms | L/C, T/T |
| Supply Ability | 500TON/MONTH |
| Delivery Time | 30DAYS |
| Packaging Details | 25KG/CTN,36CTN/PALLET or small packing |
| Standard | AS1252 |
| Material | Carbon Steel |
| Size | M16-M36 |
| Finish | ZP YZP HDG BLACK |
| Grade | 8.8 10.9 |
| Packing | Carton and pallet or according to the customer's requirement |
| Sample | Free Sample |
| Thread | machine thread |
| Lead time | Per on order quantity |
| Type | Hexagon Head |
| Advantage | we can manufacture according to client design,OEM / ODM / customized service provided |
| Oem | yes,welcome |
| Brand Name | QBH |
| Model Number | AS1252 |
| Certification | ISO9001 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 500TON/MONTH |
| Delivery Time | 30DAYS | Packaging Details | 25KG/CTN,36CTN/PALLET or small packing |
| Standard | AS1252 | Material | Carbon Steel |
| Size | M16-M36 | Finish | ZP YZP HDG BLACK |
| Grade | 8.8 10.9 | Packing | Carton and pallet or according to the customer's requirement |
| Sample | Free Sample | Thread | machine thread |
| Lead time | Per on order quantity | Type | Hexagon Head |
| Advantage | we can manufacture according to client design,OEM / ODM / customized service provided | Oem | yes,welcome |
| Brand Name | QBH | Model Number | AS1252 |
| Certification | ISO9001 | Place of Origin | CHINA |
| High Light | As1252 Heavy Hexgonal Bolt ，Heavy m6 hex bolt ，As1252 m6 hex bolt | ||
Allfasteners AS1252 structural bolts are a complete assembly of bolt, nut and washer. Selected by those who depend on quality products installed in there project to meet the requirements of Australian structural standards.
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Process flow
Cold forging
Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ thread rolling ➨make heat treatment(if need) ➨ Finish ➨ Packing
Hot forging
Cutting material ➨ hot forging ➨ turning ➨ shrink diameter(half thread) ➨thread rolling ➨ make heat treatment(if need) ➨ Finish ➨ Packing
Product Grade
Class4.8 Class5.8 Class6.8 Class8.8 Class10.9 Class12.9
| NO. | Mechanical or physical property | Property class | ||||||||||
| 4.6 | 4.8 | 5.6 | 5.8 | 6.8 | 8.8 | 9.8 | 10.9 | 12.9/12.9 | ||||
| D≤16mma | d＞16mmb | d≤16mm | ||||||||||
| 1 | Tensile strength Rm,Mpa | nom.c | 400 | 500 | 600 | 800 | 900 | 1000 | 1200 | |||
| max. | 400 | 420 | 500 | 520 | 600 | 800 | 830 | 900 | 1040 | 1220 | ||
| 2 | Lower yield strength ReL,Mpa | nom.c | 240 | —— | 300 | —— | —— | —— | —— | —— | —— | —— |
| max. | 240 | —— | 300 | —— | —— | —— | —— | —— | —— | —— | ||
| 3 | Stress at 0,2 % nonproportional elongation Rp0.2,Mpa | nom.c | —— | —— | —— | —— | —— | 640 | 640 | 720 | 900 | 1080 |
| max. | —— | —— | —— | —— | —— | 640 | 660 | 720 | 940 | 1100 | ||
| 4 | Stress at 0,0048 d non-proportional elongation for full-size fasteners Rpf,Mpa | nom.c | —— | 320 | —— | 400 | 480 | —— | —— | —— | —— | —— |
| max. | —— | 340e | —— | 420e | 480e | —— | —— | —— | —— | —— | ||
| 5 | Stress under proof load Spf,Mpa | nom. | 225 | 310 | 280 | 380 | 440 | 580 | 600 | 650 | 830 | 970 |
| Proof Sp,nom/ReL min Or strength Sp,nom/Rp0.2min Or rati Sp,nom/Rpf min | 0.94 | 0.91 | 0.93 | 0.9 | 0.92 | 0.91 | 0.91 | 0.9 | 0.88 | 0.88 | ||
| 6 | Percentage elongation after fracture for machined test pieces,A,% | min. | 22 | -— | 20 | —— | —— | 12 | 12 | 10 | 9 | 8 |
| 7 | Percentage reduction of area after fracture for machined test pieces,Z,% | min. | —— | 52 | 48 | 48 | 44 | |||||
| 8 | Elongation after fracture for full-size fasteners,Af | min. | —— | 0.24 | —— | 0.22 | 0.2 | —— | —— | —— | —— | —— |
| 9 | Head soundness | No fracture | ||||||||||
| 10 | Vickers hardness, HV, F≥98N | min. | 120 | 130 | 155 | 160 | 190 | 250 | 255 | 290 | 320 | 385 |
| max. | 220g | 250 | 320 | 335 | 360 | 380 | 435 | |||||
| 11 | Brinell hardness, HBW ,F=30D² | min. | 114 | 124 | 147 | 152 | 181 | 238 | 242 | 276 | 304 | 366 |
| max. | 209g | 238 | 304 | 318 | 342 | 361 | 414 | |||||
| 12 | Rockwell hardness,HRB , HRB | min. | 67 | 71 | 79 | 82 | 89 | |||||
| max. | 95g | 99.5 | ||||||||||
| Rockwell hardness, HRC | min. | —— | 22 | 23 | 28 | 32 | 39 | |||||
| max. | —— | 32 | 34 | 37 | 39 | 44 | ||||||
| 13 | Surface hardness HV 0.3 | max. | —— | h | h,j | h,j | ||||||
| 14 | Height of non-decarburized thread zone,E,mm | min. | —— | 1/2H1 | 2/3H1 | 3/4H1 | ||||||
| Depth of complete decarburization in the thread,G,mm | max. | —— | 0.015 | |||||||||
| 15 | Reduction of hardness after retempering,HV | max. | —— | 20 | ||||||||
| 16 | Breaking torque, MB,N·m | min. | —— | in accordance with ISO 898-7 | ||||||||
| 17 | Impact strength, KVK,I,J | min. | —— | 27 | —— | 27 | 27 | 27 | 27 | m | ||
| 18 | Surface integrity in accordance with | ISO 6157-1n | ISO 6157-3 | |||||||||
| a Values do not apply for structural bolting. | ||||||||||||
Materials and Chemical compstition
1008
| CHEMICAL COMPOSI % | ||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Al |
| 0.06 | 0.06 | 0.33 | 0.013 | 0.003 | 0.01 | 0 | 0.01 | 0.028 |
1035
| CHEMICAL COMPOSI % | |||||||
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.34 | 0.13 | 0.73 | 0.012 | 0.002 | 0.02 | 0.01 | 0.02 |
10B21
| CHEMICAL COMPOSI % | ||||||
| C | Si | Mn | P | S | Cr | B |
| 0.2 | 0.04 | 0.81 | 0.017 | 0.007 | 0.017 | 0.0021 |
1045
| CHEMICAL COMPOSI % | |||||||
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.45 | 0.23 | 0.58 | 0.014 | 0.006 | 0.057 | 0.008 | 0.016 |
40CR
| CHEMICAL COMPOSI % | |||||||
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.4 | 0.21 | 0.54 | 0.015 | 0.008 | 0.95 | 0.02 | 0.02 |
35CRMO
| CHEMICAL COMPOSI % | ||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| 0.35 | 0.22 | 0.59 | 0.01 | 0.003 | 0.93 | 0.01 | 0.01 | 0.21 |
42CRMO
| CHEMICAL COMPOSI % | ||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| 0.42 | 0.27 | 0.92 | 0.013 | 0.004 | 1.01 | 0.03 | 0.04 | 0.2 |
As1252 Heavy hexgonal Bolt are commonly used in critical structural applications such as Bridges, buildings and other infrastructure. Ensuring their quality is critical to the safety and structural integrity of these works. The control and traceability of the A325M heavy duty hex bolt or any fastener is a key aspect of the construction and engineering industry. Safety and structural integrity are the correct applications that distinguish As1252 Heavy hexgonal Bolt. Batch control and traceability help maintain the highest safety standards. Batch control ensures that the bolts used in the project come from the same production batch. This helps maintain consistent quality and ensures that all bolts from a particular batch meet the same specifications and standards. In the rare cases where defects or problems are found in a particular batch of bolts, being able to trace back to the source of those bolts can facilitate an effective recall and replacement. This minimizes downtime and project delays.
As1252 Heavy hexgonal Bolt are designed for steel to steel connections. Because they are used in
such a specific application, they have dimensional characteristics that are unique and limited compared
to most other fastener grades. This includes stock sizes available in the market place, length tolerances,
short thread lengths, and the actual head dimensions are the same as any heavy hex head bolt.
AS 1252 covers high strength structural bolts used in structural steel connections. As1252 Heavy hexgonal Bolt have
a heavy hex head, a full body diameter, and are normally short in overall length since they are connecting
steel to steel.
Company Details
Business Type:
Manufacturer,Trading Company,Seller
Year Established:
2014
Total Annual:
3000-4500
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Jiaxing City Qunbang Hardware Co,ltd is a productiondesignsales and after-sales as one of the fasteners business,The company is located in HangjiaHu Plain,close to ShanghaiNingboZhapu ports.The geographical position is superior,the transportation is convenient,has created the nat... Jiaxing City Qunbang Hardware Co,ltd is a productiondesignsales and after-sales as one of the fasteners business,The company is located in HangjiaHu Plain,close to ShanghaiNingboZhapu ports.The geographical position is superior,the transportation is convenient,has created the nat...
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