A4-70 Bolt

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A4-70 Bolt

A4-70 Bolt Product Highlights

  • Sizes in Stock : M10 To M110
  • Material : Stainless Steel
  • Accept small orders? : Accept
  • Manufacture Processing : Cold Forging
  • Benefits : High Strength
  • Third Party Inspection : Yes

 

A4 70 Hex Bolt Manufacturer in India, as per DIN 934

A4-70 SS Bolt

A4-70 SS Bolt

A4-70 Hex Bolt

A4-70 Hex Bolt

ISO 3506-1 Grade A4-70 Bolt

ISO 3506-1 Grade A4-70 Bolt

 

Looking for the best A4-70 Bolt manufacturer in India? We are the best source. Click Here to Contact

Table of Content

 

 

A4-70 Bolt specification

Supplier of A4-70 Stainless Steel Screw in Mumbai, in Various Sizes

A4-70 Bolt Specifications

Sizes

A4 70 Bolt Sizes

  • Metric sizes: M2 To M160
  • Imperial Sizes : 3/6″ to 1-1/2″
  • Length: 3 mm – 200 mm

 

Threads

A4-70 Stainless Steel Heavy Hex Bolt Threads

  • UNC, BSF
  • METRIC
  • UNF, BSW

 

Standard

A4 70 Hex Bolts Standard

  • USA : ISO ISO 4032, ISO 4033
  • Germany : DIN 931, DIN 933, DIN 970
  • Australia : UNC, UNF, UNEF, UNS, NPT

Process

A4 70 Bolt Forming Process

  • Surface Plating
  • Cold Heading
  • Insert Tapping

 

Testing Methods

A4 70 Allen Bolt Testing Methods

  • Hardness Testing
  • PMI Testing
  • Pitting Resistance
  • IGC Testing
  • Tensile & Flattening Test

Surface Finish

A4-70 SS Bolt Surface Finish

  • Electric galvanized
  • Zinc impregnation
  • Oxidation
  • DACROMET, HDG
  • Phosphating

 

Application

ISO 3506-1 Grade A4-70 Screw Application

  • Petrochemical
  • Chemical Refining
  • Automobile
  • Building & Construction

Delivered Areas

Types of Stainless Steel Bolt Grade A4-70 Delivered Areas

  • USA, Dubai
  • Algeria, South africa
  • UAE, Abu Dhabi
  • Oman, Saudi Arabia

 

Condition

A4 70 Hex Bolt Condition

  • Cold Drawn
  • Threading

Thread Pitch

DIN 931 Grade A4-70 Bolt Thread Pitch

  • Coarse Threads
  • Fine Threads

 

Ends

A270 Threaded Rod Ends

  • Rounded
  • Saw cut
  • Sheared
  • Chamfer, Flat

Features

A4 70 Socket Head Cap Screw Features

  • Low Maintenance
  • High Corrosion Resistance
  • Non-Magnetic
  • Environmentally Friendly

 

Packaging

Packaging of A4 70 Bolt and Nut

  • Corrugated Box
  • Pallet
  • Carton
  • Small Pack

 

Marking

A4-70 Countersunk Boltt Marking

  • Material grade
  • Specification
  • Heat number
  • Custom logo

 

 

Most Common Types of A4-70 Bolt

A4-70 Bolt Supplier in India Provides a Wide Range of The Most Common Types

A4 70 Bolt

A4 70 Bolt

A4 70 stainless steel Hex Bolt

A4 70 stainless steel Hex Bolt

SS A4-70 Allen Bolt

SS A4-70 Allen Bolt

 

A4 70 Hex Head Bolt

A4 70 Hex Head Bolt

A4-70 SS Stud Bolt

A4-70 SS Stud Bolt

A4 70 Stainless Steel Socket Head Cap Screw

A4 70 Stainless Steel Socket Head Cap Screw

 

M8 A4 70 Self Tapping Screw

M8 A4 70 Self Tapping Screw

SS Grade A4-70 Set Screw

SS Grade A4-70 Set Screw

A4-70 Hex Nut

A4-70 Hex Nut

 

Stainless A4 70 Nyloc Nut

Stainless A4 70 Nyloc Nut

A4 70 stainless steel Threaded Rod

A4 70 stainless steel Threaded Rod

DIN 913 A4-70 Studs

DIN 913 A4-70 Studs

 

Stainless Steel Flange Bolt A4-70

Stainless Steel Flange Bolt A4-70

SS Grade A4-70 Anchor Bolt

SS Grade A4-70 Anchor Bolt

Grade A4-70 Carriage Bolt

Grade A4-70 Carriage Bolt

 

Heat Treatment of A4-70 Fasteners

Solution Annealed 1050°C
Liquid Quenched 260°C

 

Dimensions Chart of DIN 931 Grade A4-70 Hex Bolts

A4 70 Bolt Manufacturer in India offers a wide Range of Dimensions

Dimensions Chart of DIN 931 Grade A4-70 Hex Bolts

Nominal M-16 M-18 M-20 M-22 M-24 M-27 M-30 M-33 M-36 M-39 M-42 M-45 M-48 M-52 M-56 M-60 M-64
Pitch of thread P MM 2 2.5 2.5 2.5 3 3 3.5 3.5 4 4 4.5 4.5 5 5 5.5 5.5 6
Width across corners e Min. 26.17 29.56 32.95 37.29 39.55 45.2 50.85 55.37 60.79 66.44 71.3 76.95 82.6 88.25 93.56 99.21 104.86
Width across flats s Min. 23.16 26.16 29.16 33 35 40 45 49 53.8 58.8 63.1 68.1 73.1 78.1 82.8 87.8 92.8
Max. 24 27 30 34 36 41 46 50 55 60 65 70 75 80 85 90 95
Thickness of head k Min. 9.71 11.15 12.15 13.65 14.65 16.65 18.18 20.58 22.08 24.58 25.58 27.58 29.58 32.5 34.5 37.5 39.5
Max. 10.29 11.85 12.85 14.35 15.35 17.35 19.12 21.42 22.92 25.42 26.42 28.42 30.42 33.5 35.5 38.5 40.5
Thread Length b Bolt ≤125 38 42 46 50 54 60 66 72 78 84 90 96 102 110 118 – –
Bolt 125-200 44 48 52 56 60 66 72 78 84 90 96 102 108 116 124 132 140
Bolt ≥200 57 61 65 69 73 79 85 91 97 103 109 115 121 129 137 145 153
Transition Diameter da Max. 17.7 20.2 22.4 24.4 26.4 30.4 33.4 36.4 39.4 42.4 45.6 48.6 52.6 56.6 63 67 71
Dia. of washer face dw Min. 22 24.85 27.7 31.35 33.25 38 42.75 46.55 51.11 55.86 59.95 64.7 69.45 74.2 78.66 83.41 88.16
Diameter of unthreaded shank ds Min. 15.57 17.57 19.48 21.48 23.48 26.48 29.48 32.38 35.38 38.38 41.38 44.38 47.38 51.26 55.26 59.26 63.26
Max. 16 18 20 22 24 27 30 33 36 39 42 45 48 52 56 60 64
Radius under head r Min. 0.6 0.6 0.8 0.8 0.8 1 1 1 1 1 1.2 1.2 1.6 1.6 2 2 2
Depth of washer face c Min. 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
Max. 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 1 1 1 1 1 1 1 1
Major Diameter (D) Min. 15.68 17.62 19.62 21.62 23.58 26.58 29.52 32.52 35.46 38.46 41.44 44.44 47.4 51.4 55.36 59.36 63.32
Min. 15.96 17.96 19.96 21.96 23.95 26.95 29.95 32.95 35.94 38.94 41.94 44.94 47.93 51.93 55.92 59.92 63.92
Pitch Diameter (D1) Min. 14.5 16.15 18.15 20.15 21.8 24.8 27.5 30.5 33.15 36.2 38.8 41.8 44.5 48.5 52.1 57.85 59.8
Max. 14.6 16.25 18.25 20.25 21.9 24.9 27.6 30.6 33.25 36.3 38.9 41.9 44.6 48.6 52.2 57.95 59.9
Minor Diameter (D2) Max. 13.8 15.25 17.25 19.25 20.7 23.7 26.16 29.16 31.61 34.61 37.07 40.07 42.52 46.52 49.97 53.97 57.42

 

Stainless Steel A4-70 Heavy Hex Bolts Dimensions

Stainless Steel A4-70 Heavy Hex Bolts Dimensions

Nominal Size of D  – M16 M20 M24 M12 M80 M30 M36 M64 M72 M90 M42 M10 M14 M48 M56 M100
Diameter of Body D (Max) 16 20 24 12 80 30 36 64 72 90 42 10 14 48 56 90
D (Min) 15.73 19.67 23.67 11.73 79.26 29.67 35.61 63.26 71.26 89.13 41.38 9.78 13.73 47.38 55.26 99.13
Thickness of Head H (Max) 10.32 12.88 15.44 7.76 51.58 19.48 23.38 41.32 46.45 57.74 26.97 6.63 9.09 31.07 36.2 63.9
H (Min) 9.68 12.12 14.56 4.24 48.42 17.92 21.63 38.68 43.55 54.26 25.03 6.17 8.51 28.93 33.8 60.1
Bolts Corners Across C (Max) 27.71 34.64 41.57 20.78 132.72 53.12 63.51 109.7 121.24 150.11 75.06 18.48 24.25 86.6 98.15 167.43
C (Min) 26.75 32.95 39.55 20.03 126.54 50.85 60.79 104.65 115.6 143.07 71.71 17.77 23.35 82.76 93.71 159.6
Flats Across F (Max) 24 30 36 19 115 46 55 95 105 130 65 17 22 75 85 145
F (Min) 23.67 29.16 35 17.73 111 45 53.8 91.8 101.4 125.5 62.9 15.73 20.67 72.6 82.2 140

 

A4 70 Socket Head Cap Screw Manufacturing Standard

DIN Standard
 DIN 933 DIN 934 DIN 912 DIN 931 DIN 603 DIN 6923
ISO Standard ISO 7093 ISO 4014 ISO 4017 ISO 4032 ISO 4762 ISO 7089

 

Weight Chart of A4 70 Bolt and Nut

Bolt Size A (max) B C (min) D E F Thread Length for Bolt Length
min max over 6″ 6″ and shorter
1″ 1.022 1-1/2 1.653 43/64 0.03 0.09 2.500 2.250
1-1/8″ 1.149 1-11/16 1.859 3/4 0.03 0.09 2.750 2.500
1/4″ 0.260 7/16 0.484 11/64 0.01 0.03 1.000 0.750
1/2″ 0.515 3/4 0.826 11/32 0.01 0.03 1.500 1.250
1-1/4″ 1.277 1-7/8 2.066 27/32 0.03 0.09 3.000 2.750
1-3/8″ 1.404 2-1/16 2.273 29/32 0.03 0.09 3.250 3.000
1-1/2″ 1.531 2-1/4 2.480 1 0.03 0.09 3.500 3.250
1-3/4″ 1.785 2-5/8 2.893 1-5/32 0.04 0.12 4.000 3.750
2″ 2.039 3 3.306 1-11/32 0.04 0.12 4.500 4.250
2-1/2″ 2.559 3-3/4 4.133 1-21/32 0.06 0.19 5.500 5.250
2-1/4″ 2.305 3-3/8 3.719 1-1/2 0.06 0.19 5.000 4.750
2-3/4″ 2.837 4-1/8 4.546 1-13/16 0.06 0.19 6.000 5.750
3″ 3.081 4-1/2 4.959 2 0.06 0.19 6.500 6.250
3/8″ 0.388 9/16 0.620 1/4 0.01 0.03 1.250 1.000
5/8″ 0.642 15/16 1.033 27/64 0.02 0.06 1.750 1.500
3/4″ 0.768 1-1/8 1.240 1/2 0.02 0.06 2.000 1.750
7/8″ 0.895 1-5/16 1.447 37/64 0.02 0.06 2.250 2.000
7/16″ 0.452 5/8 0.687 19/64 0.01 0.03 1.375 1.125

 

Grades of Grade A4-70 Nuts & screws

Steel Group Austenitic
Steel Grade A3 A4 A1 A2 A5

 

Marking of ISO 3506-1 Grade A4-70 Heavy Hex Bolt

Marking of ISO 3506-1 Grade A4-70

 

Stockist of ISO 3506-1 Grade A4 70 Bolt Offer High Acidic Corrosion Resistance

Corrosion Resistance of A4 70 Screw

Applications of A4 70 Allen Bolt

 

SS Grade A2-80 Nuts Classification of the Degree of Resistance Into Different Groups

Degree ofresistance A B C D
Assessment Fully resistant Practically resistant Less resistant Not resistant
Weight loss in g/m2h < 0.1 0.1-1.0 1.0-10 > 10

 

A4-70 Metric Hex Bolt Torque Chart

A4 70 Bolt Torque Chart – Diameter of Bolts 3 mm 4 mm 5 mm 6 mm 8 mm 10 mm 14 mm 16 mm 18 mm 20 mm 22 mm 24 mm
Torque (Through M10 to M12 over ft-lbs.) Lubricated 8.0 in-lbs. 20.7 40.6 69.3 169 335 78 119 171 246 322 400
Dry 8.9 in-lbs. 23 45.1 77 188 372 87 133 190 273 358 445
Torque (N-m) Lubricated 0.9 2.3 4.6 7.8 19.1 38 106 162 232 333 437 543
Dry 1 2.6 5.1 8.7 21.2 42 118 180 258 370 485 603

 

A4-70 Threaded Rod Use in Marine and Offshore Structures

Application of SS A4 70 Bolt

Application of SS A4 70 Bolt

 

What Certifications Should Be Requested When Purchasing A4 70 Bolts From Km Steel India?

  • Country of Origin Certificate
  • Raw Material Test Reports
  • Heat Treatment Charts
  • Quality Assurance Plan (QAP)
  • Fumigation Certificates
  • EN 10204 3.1 Mill Test Certificate
  • ISO 3506-1 Compliance Certificate
  • Third-Party Inspection Report
A4-70 SS Hex Nut With Strength 700 MPa, Refer Material Properties

Mechanical Properties of A4-70 Stainless Steel Socket Head Cap Screw

Steel Group Austenitic
Steel Grade A1, A2 A3, A4 A5
Property Class 50 70 80
Tensile StrengthRma min. Mpa 500 700 800
Stress at 0.2 % permanent strain Rp0.2a min. Mpa 210 450 600
Elongation after fracture Ab min. mm 0.6d 0.4d 0.3d

 

Chemical Composition of A4-70 Hex Bolts

A4-70 Bolt Manufacturer in India Provides Accurate Chemical Composition of Fasteners.

Steel Group Austenitic
Steel Grade A1 A2 A3 A4 A5
Chemical composition mass fraction, % (maxima unless stated)) C 0.12 0.1 0.08 0.08 0.08
Si 1 1 1 1 1
Mn 6.5 2 2 2 2
P 0.2 0.05 0.045 0.045 0.045
S 0.15 to 0.35 0.03 0.03 0.03 0.03
Cr 16 to 19 15 to 20 17 to 19 16 to 18.5 16 to 18.5
Mo 0.7 – – 2 to 3 2 to 3
Ni 5 to 10 8 to 19 9 to 12 10 to 15 10.5 to 14
Cu 1.75 to 2.25 4 1 4 1

 

A4-70 Stainless Steel Bolts Physical Properties

A4-70 Bolt Supplier in India offers Fasteners with Physical Properties.

Property Density Specific Heat Elec Resistivity Elastic Modulus Thermal Conductivity
Values 8000 kg/m³ 500 J/kg.K 740 nΩ.m 193 GPa 16.3 (W/m.K)

 

Material Inspection Facility in Following Countries

Suplier of A4-70 Bolt, Supply A4-70 Allen Bolt in Various Countries

Saudi Arabia UAE
USA Algeria
Ethiopia Zambia
New South Wales Mozambique
Nigeria South Africa
Angola Tanzania
Gabon Morocco
Tunisia –
Oman Ghana
Kenya Egypt

 

Chemical Resistance of Stainless A4 70 Bolt and Nut

Corrosive agent Concentration Temperature in °C Degree of resistance
A4
Acetic acid 10% 20 A A
boiling
Benzoic acid all all A
Benzol – all A
Carbon dioxide – – A
Chromic acid 10% pure 20 A B B D
50% pure boiling 20
boiling
Citric acid to 10% all 20 A A B
50% boiling
Copper acetate – all A
Copper nitrate – – A
Glycerine conc. all A
Hydrochloric acid 0.20% 20 B B D D D
2% 50
to 10% 20
50
20
Mercury – to 50 A
Mercury nitrate – all A
Methyl alcohol all all A
Nitric acid to 40% all 20 A A B A C
50% boiling 20
90% boiling
Phosphoric acid 10% boiling 20 A A B A C A D
50% boiling 20
80% boiling 20
conc. boiling
Potassium permanganate 10% all A
Salicylic acid – 20 A
Seawater – 20 A
Sulphurous acid aqueous solution 20 A

 

Why Choose KM Steel India for A4 70 Bolts?

Why Choose KM Steel India for A4-70 Bolts

 

Delivery Location and Time For Stainless A4 70 Nut Suppliers

Country Name Delivery Time
Egypt 18 days
Saudi Arabia 7 days
Thailand 7 days
Jordan 21 days
Singapore 8 days
UAE 5 days
South Africa 25-30 days
Turkey 21 days
Malaysia 10 days

 

Is A4-70 Heavy Hex Bolt Suitable for Marine Applications?

They have high mechanical strength and good resistance to seawater.

A4-70 vs A4-80

A2-80 vs A4-70

Apparent Yielding Point Loads for A4-70 Set Screws

Nominal Diameter Size Apparent yielding point loads
for austenitic steels
Strength class 70
M5 6,390
M6 9,045
M8 16,470
M10 26,100
M12 37,935
M16 70,650
M20 110,250
M24 88,250
M27 114,750
M30 140,250

 

Installing and Maintaining A4 70 Bolts

Installing and Maintaining A4-70 Bolts

 

A4 70 Bolt vs 8.8

Property Tensile Strength (MPa) Proof Stress (MPa) Hardness (HB) Density (kg/m³) Max Temperature (°C) Magnetic Corrosion Resistance (1-5)
A4-70 700 450 215 7980 870 0 5
8.8 800 640 250 7850 300 1 2

 

Hardness of DIN 933 Grade A4-70 Fasteners

Hardness Not required

 

Shear Strength of A4 70 Socket Head Cap Screw

Bolts size M10 M16 M12 M20 M27
Shear capacity (1) Psb (kN)  8.4 18 22.3 22.7 48.7 60.3 12.2 26.2 32.4 35.5 76.1 94.1 66.4 142.5 176.3
Property class (BS EN ISO 3506) 50 70 80 50 70 80 50 70 80 50 70 80 50 70 80
Tension Capacity Pnom (kN) 9.8 20.9 26 26.4 56.5 70.3 14.2 30.3 37.8 41.2 88.2 109.8 77.1 165.3 205.6
Bolts size M24 M39 M33 M30 M36
Shear capacity (1) Psb (kN) 51.1 109.6 135.6 141.3 303 374.9 100.5 215.5 266.6 81.2 174.2 215.5 118.3 253.7 313.8
Property class (BS EN ISO 3506) 50 70 80 50 70 80 50 70 80 50 70 80 50 70 80
Tension Capacity Pnom (kN) 59.3 127.1 158.1 164 351.4 437.1 116.6 249.9 310.8 94.2 202 251.3 137.2 294.2 365.9

 

Tightening Torque of A4-70 Stainless Steel Screw

Thread A4 70 bolt tightening torque for property class
70
M1.6 0.2
M2.5 0.9
M2 0.4
M3 1.6
M5 7.8
M4 3.8
M6 13
M16 290
M10 65
M8 32
M12 110

 

Tension Capacity A4-70 SS Bolts

Tension Capacity
Pnom (kN)
20.9
30.3
41.4
56.5
88.2
127.1
165.3
202
249.9
294.2
351.4

 

A4-70 Bolt Yield Strength

Yield strength (0.2% Proof, Min)  450 MPa

Our Product

Why Choose KM Steel India ?

  • ISO & PED Approved Manufacturer & Supplier for Fastening Products
  • Importer and Exporter of Hex Bolts, Threaded Rod, Studs, Socket Head cap screws in Maharashtra.
  • Top 5 Trader & Wholesaler of Set screws, Machine screws, Washers, Heavy Hex head bolt, Double Ended Studs in India, For Low and High Temperature Applications.
  • Offer Inexpensive Rates to the local Distributor & Reseller Binondo, Saudi Arabia, Manila, Quezon city, South Africa, UAE, Sharjah, Philippines, Cebu, Penang.
  • Stockist of Rivets, Hex Nuts, Lock Nuts, Bolts and Nuts Used in Various Industries and Applications For Fastening and Securing Purposes in Maharashtra.