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DIN6914 High Strength Heavy Hex Class 10.9 Steel Nut Bolts

  • DIN6914 High Strength Heavy Hex Class 10.9 Steel Nut Bolts
  • DIN6914 High Strength Heavy Hex Class 10.9 Steel Nut Bolts
  • DIN6914 High Strength Heavy Hex Class 10.9 Steel Nut Bolts
  • DIN6914 High Strength Heavy Hex Class 10.9 Steel Nut Bolts
Place of Origin CHINA
Brand Name QBH
Certification ISO9001
Model Number DIN6914
Minimum Order Quantity 900kg
Price Negotiation
Packaging Details 25KG/CTN,36CTN/PALLET or small packing
Delivery Time 30DAYS
Payment Terms L/C, T/T
Supply Ability 500TON/MONTH

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Product Details
Standard DIN6914 Material Carbon Steel
Size M12-M36 Finish ZP YZP HDG BLACK
Grade 4.8 6.8 8.8-12.8ect 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
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DIN6914 Steel Nut Bolts

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CL10.9 Steel Nut Bolts

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DIN6914 Heavy Hex Head Bolt
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Product Description

 

Specification

 

Structural Hex Head Bolts

DIN 6914 - High-strength injection structural bolts

Current norm: DIN EN 14399-4
Equivalent norms: ISO 7411; PN 82343; UNI 5712; EU 781

 

DIN6914 High Strength Heavy Hex Class 10.9 Steel Nut Bolts 0

Legend:

b - length of the thread (at least)
l - length of bolt
d - the nominal diameter of the thread
k - head height
r - radius
e - the diameter of the circumscribed circle (not less than)
s - size hex head turnkey
c - thickness of the mounting collar
ds - diameter of the screw shank
u - thread run
lg - length of the shank to thread
ls - length of the shank to the start of the thread
da - the maximum diameter of the stem at the head of the screw
dw - minimum diameter of the seat
k´ - minimum size of the head on the key

 

Makings:QBH HV 10.9

Steel: 10.9
Stainless: -
Plastic: -
Non Ferrous: -
Thread: 6g
 

Table according to DIN 6914:

Thread d M12 M16 M20 M22 M24 M27 M30 M36
P 1.75 2 2.5 2.5 3 3 3.5 4
b (see tab. below) above tde continuous steped line 21 26 31 32 34 37 40 48
under tde continuous steped line 23 28 33 34 37 39 42 50
c Min. 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Max. 0.6 0.6 0.8 0.8 0.8 0.8 0.8 0.8
da Max. 15.2 19.2 24 26 28 32 35 41
ds Nomial size 12 16 20 22 24 27 30 36
Min. 11.3 15.3 19.16 21.16 23.16 26.16 29.16 35
Max. 12.7 16.7 20.84 22.84 24.84 27.84 30.84 37
dw Min. 20 25 30 34 39 43.5 47.5 57
e Min. 23.91 29.56 35.03 39.55 45.2 50.85 55.37 66.44
k Nomial size 8 10 13 14 15 17 19 23
Min. 7.55 9.25 12.1 13.1 14.1 16.1 17.95 21.95
Max. 8.45 10.75 13.9 14.9 15.9 17.9 20.05 24.05
k´ Min. 5.28 6.47 8.47 9.17 9.87 11.27 12.56 15.36
r Min. 1.2 1.2 1.5 1.5 1.5 2 2 2
s Nomial size = max. 22 27 32 36 41 46 50 60
Min. 21.16 26.16 31 35 40 45 49 58.8


 

 

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.
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.
     
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Product application

 

High-strength Hexagon Head bolts DIN 6914 are intended for use in GV and SL structural steel bolting in accordance with 18 800 part 1,together with DIN6915 Hexagon nuts and DIN 6916,DIN6917 or DIN6918 washers.

 

DIN6914 High Strength Heavy Hex Class 10.9 Steel Nut Bolts 1

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