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8.8 HDG Carbon Steel M16 TO M36 Electrical Fasteners

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Jiaxing City Qunbang Hardware Co., Ltd

City: jiaxing

Province/State:zhejiang

Country/Region:china

Tel:86-573-82071082

Contact Person:
Mr.Lance View Contact Details

8.8 HDG Carbon Steel M16 TO M36 Electrical Fasteners

Brand Name	QBH
Model Number	AS1252
Certification	ISO9001
Place of Origin	CHINA
Minimum Order Quantity	900kg
Price	Negotiation
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

Detailed Product Description

8.8 HDG Carbon Steel M16 TO M36 Electrical Fasteners

Specification

8.8 High-Tensile Structural Bolt AS1252

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.

Class 8.8 high-tensile grade
Hot dipped galvanised
Metric thread
Manufactured to AS1252:1983 dimensions (1996 mechanical properties)

Screw Thread
d

P	Thread Pitch
b	L≤125
	125＜L≤200
	200＜L
d_s	max
d_s	min
s	max
s	min
e	max
e	min
k	max
k	min

2	2.5	2.5	3	3	3.5	4
38	46	50	54	60	66	78
44	52	56	60	66	72	84
-	65	69	73	79	85	97
16.7	20.84	22.84	24.84	27.84	30.84	37
15.3	19.16	21.16	23.16	26.16	29.16	35
27	34	36	41	46	50	60
26.16	33	35	40	45	49	58.8
31.2	39.26	41.6	47.3	53.1	57.7	69.3
29.56	37.29	39.55	45.2	50.85	55.37	66.44
10.75	13.4	14.9	15.9	17.9	19.75	23.55
9.25	11.6	13.1	14.1	16.1	17.65	21.45

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
			4.6	4.8	5.6	5.8	6.8	D≤16mm^a	d＞16mm^b	d≤16mm	10.9	12.9/12.9
1	Tensile strength R_m,Mpa	nom.^c	400		500		600	800		900	1000	1200
1	Tensile strength R_m,Mpa	max.	400	420	500	520	600	800	830	900	1040	1220
2	Lower yield strength R_eL,Mpa	nom.^c	240	——	300	——	——	——	——	——	——	——
2	Lower yield strength R_eL,Mpa	max.	240	——	300	——	——	——	——	——	——	——
3	Stress at 0,2 % nonproportional elongation R_p0.2,Mpa	nom.^c	——	——	——	——	——	640	640	720	900	1080
3	Stress at 0,2 % nonproportional elongation R_p0.2,Mpa	max.	——	——	——	——	——	640	660	720	940	1100
4	Stress at 0,0048 d non-proportional elongation for full-size fasteners R_p^f,Mpa	nom.^c	——	320	——	400	480	——	——	——	——	——
4		max.	——	340^e	——	420^e	480^e	——	——	——	——	——
5	Stress under proof load S_p^f,Mpa	nom.	225	310	280	380	440	580	600	650	830	970
5	Proof S_p,nom/R_{eL min} Or strength S_p,nom/R_p0.2min Or rati S_p,nom/R_{pf 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,A_f	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
10	Vickers hardness, HV, F≥98N	max.	220^g				250	320	335	360	380	435
11	Brinell hardness, HBW ,F=30D²	min.	114	124	147	152	181	238	242	276	304	366
11	Brinell hardness, HBW ,F=30D²	max.	209^g				238	304	318	342	361	414
12	Rockwell hardness,HRB , HRB	min.	67	71	79	82	89
	Rockwell hardness,HRB , HRB	max.	95^g				99.5
	Rockwell hardness, HRC	min.	——					22	23	28	32	39
	Rockwell hardness, HRC	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
14	Depth of complete decarburization in the thread,G,mm	max.	——					0.015
15	Reduction of hardness after retempering,HV	max.	——					20
16	Breaking torque, M_B,N·m	min.	——					in accordance with ISO 898-7
17	Impact strength, K_V^K,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. b For structural bolting d W M12. c Nominal values are specified only for the purpose of the designation system for property classes.See Clause 5. d In cases where the lower yield strength ReL cannot be determined, it is permissible to measure the stress at 0,2 % non-proportional elongation Rp0,2. e For the property classes 4.8, 5.8 and 6.8 the values for Rpf min are under investigation. The present values are given for calculation of the proof stress ratio only. They are not test values. f Proof loads are specified in Tables 5 and 7. g Hardness determined at the end of a fastener shall be 250 HV, 238 HB or 99,5 HRB maximum. h Surface hardness shall not be more than 30 Vickers points above the measured core hardness of the fastener when determination of both surface hardness and core hardness are carried out with HV 0,3. i Any increase in hardness at the surface which indicates that the surface hardness exceeds 390 HV is not acceptable. j Any increase in hardness at the surface which indicates that the surface hardness exceeds 435 HV is not acceptable. k Values are determined at a test temperature of −20 °C, see 9.14. l Applies to d W 16 mm. m Value for KV is under investigation. n Instead of ISO 6157-1, ISO 6157-3 may apply by agreement between the manufacturer and the purchaser.

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

Finish

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

The advantages of QBH

QBH brand sales to the main quality assurance.
Years of export trade management, excellent service, word-of-mouth guarantee.
By working with TUV,escort for quality.
Customization of non-standard parts can be made according to customer's requirements and drawings.
For quality customers,we can provide a certain credit period.

Product application

AS1252 Gr8.8 High Tensile Structural Bolts HDG

The bolts of AS1252 bolt nut washer assemble HDG Factory has machine screw threads on one end and hex head on the other with a washer face under the head for a better seal. These Bolts can tighten into a machine directly, because AS1252 bolt nut washer assemble HDG Factory has washers and nuts that are the same grade and finish as the hex bolt. Partially threaded shank allows for a stronger grip between objects and less shear movement.

AS1252 bolt nut washer assemble HDG Factory is composed of bolt, nut and washer. AS1252 bolt nut washer assemble HDG Factory has to pre-drill any holes for best result. Tighten these thumb screws with a wrench for more torque while fastening. These bolt nut washer assemble is suitable for fastening most machinery and equipment.

AS1252 bolts are headed, externally threaded fasteners used to keep two objects, often metal or wood, in a fixed position relative to one another. Unlike screws, which cut their own threads, bolts pair with the internal threads of nuts to stay in place and ensure the desired level of tension in the bolted joint. The use of nuts aids in disassembly and reassembly. In addition, bolts generally have a greater load bearing capacity than screws but lack a tapered shaft. The head style of the bolt determines the tool required for tightening and loosening. Bolts are responsible for holding together everything from furniture to machinery to bridges.

AS1252 bolts include fully threaded screws and partially threaded screws. Fully threaded screws engage with a tapped, threaded hole all the way to the head. Choose these when sideways force is not a concern. Partially threaded screws have an unthreaded portion under the head for more holding power when force is applied from the side. The unthreaded portion is stronger than the threaded portion of the screw. Thread length may vary from the minimum thread length published to fully thread.

AS1252 bolt nut washer assemble HDG Factory is designed for high load applications requiring a high tensile strength, especially those connecting steel to steel, such as the construction of bridges and buildings. AS1252 bolt nut washer assemble HDG Factory has to pre-drill any holes for best result and to use washers and nuts that are a similar grade and finish. Tighten these thumb screws with a wrench for more torque while fastening.

Product Tags: HDG Electrical Fasteners M36 Electrical Fasteners M16 High Strength Bolts For Steel Structure

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