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A4-70 Stainless Steel Bolts

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CHEMICAL & MECHANICAL COMPOSITION

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A4-70 Stainless Steel Bolts

A470 Bolt, A4-70 Stainless Steel Screw, A4-70 Threaded Rod, A4-70 Nut Material, A4-70 Fastener, Stainless Steel Bolt Grade A4-70, Socket Head Cap Screw A4-70, Hex Bolt A4-70

Detailed Information

Prashaant Steel & Alloys is well-known for its manufacturing and export of A4-70 and A4-80 Stainless Steel Bolts. We supply various sorts of fasteners that are in high demand and will continue to be in high demand. Our customers may customise their orders completely, including the packaging. We take all necessary precautions during delivery to assure that no single product is damaged.

A4-70 Stainless Steel Bolt is made of 316L or 316 stainless steel austenite grade, with the letter “A” dedicated to the cold working method. We also provide all grades with client-specified specifications, with a size range of M10 to M100 for A4-70 SS Bolt. Bolts are sought after by heavy machinery since they are significantly more durable due to their geometric forms and great tensile strength.

The A2-80 Bolt is the class’s fastener, with ASTM A194 and A193 standards. Uv A2 80 Bolt, for example, is a member of the aforementioned group. Sulphur and silicon, in addition to phosphorus and manganese, are significant elements, with nickel accounting for 8% and chromium accounting for 18% in A2-80 Fasteners. They’re generally scaled up from 12 inches to 24 inches.

The A4 70 Grade Bolts offer high acidic corrosion resistance and chloride ion corrosion resistance thanks to their composition. As a result, these fasteners are suited for maritime industrial applications as well as acidic environments. The difference between an a4-70 bolt and an 8.8 bolt is that the 8.8 bolt has a higher tensile strength and is constructed of different material composition. Other classes of fasteners are constructed of the same material, but their mechanical characteristics are different. The minimum tensile strength is the difference between a4-70 and a4-80. The A4-70 grade has a minimum tensile strength of 700 MPa, whereas the A4-80 grade has a minimum tensile strength of 800 MPa. Please contact us for additional information on the various fasteners as well as price.

A4-70 Stainless Steel Bolts Specification

Product name

A4-70 Stainless Steel Bolts

Place of Origin

India

Standard

ISO 4017, DIN931, GB5783, DIN, ASTM, ANSI, JIS, EN, AS

DIN Standard

B.S. DIN933 DIN931 DIN934 DIN912 DIN603 DIN6923

Surface treatment

Passivation /plain

A4-70 Stainless Steel Bolts Size

M2 – M100

A4-70 Stainless Steel Bolts Diameter

M3-M60

A4-70 Stainless Steel Bolts Length

6mm-500mm

Head

Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc

Neck type

Hex, Square, Triangular, Oval & Knurled etc

Drive type

Phil, Slotted, Hex socket, Torx & square slot etc

A4-70 Stainless Steel Bolts Application

Wind tower, Nuclear power, Railway, Automotive industry, Construction, Electronic industry

Dimensions

ASME B18.6.3 **Exception: screws 6 inches and shorter are fully threaded.

Drive Style

Type I

A4-70 Stainless Steel Bolts Material

18-8 Stainless Steel, stainless steel ss 304/ SS316 A2/A4, SS201, SS303, SS304, SS316, SS316L, SS904L, A2-70; A4-70; A4-80

Thread Requirements

ASME B1.1, UNC & UNF, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge)

Finish

Per ASTM A380/A380M

Finishing

Zinc Plated (Yellow, White, Blue, Black), Hop Dip Galvanized (HDG) phosphorization, Black Oxide, Geomet, Dacroment, anodization, Nickel plated, Zinc-Nickel plated, Brass Plated, Tin Plated, Black Plated, Copper Plated, Gold Plated, Salt fog test

Stock Products

Stainless steel: All DIN, GB Standard and part ASNI standard A4-70 Stainless Steel Bolts, Example: ISO7380, DIN7981, DIN7982, DIN916, DIN913, DIN7985, DIN912

Production technology

Cold Forged

Manufacturing Process

Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing

MOQ

10 pieces

Delivery time

Regular product is about 7-15 days, custom product will according to special requirement

Others

OEM, ODM, ±0.03MM tolerance

Surface treatment of A4-70 Stainless Steel Bolts

  • Passivation
  • Polish
  • Anodizing
  • Sand blasting
  • Electroplating (color, blue, white, black zinc, Ni, Cr, tin, copper, silver)
  • Black oxide coating
  • Heat-disposing
  • Hot-dip galvanizing
  • Rust preventive oil

Coatings

Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request

Tolerance of A4-70 Stainless Steel Bolts

+/-0.01mm to +/-0.05mm

Samples

Yes

 

A4 70 Bolts Chemical Composition

Grade

C

Si

Mn

P

S

Cr

Mo

Ni

Cu

N

A4-70

Min

16.0

2.0

10.5

ISO

Max

0.08

1.00

2.00

0.045

0.03

18.5

3.0

14.0

1.0

A4-70

Min

16.0

2.0

11.5

0.12

ISO²

Max

0.03

1.00

2.00

0.045

0.03

18.5

3.0

14.0

1.0

0.22

316

Min

0

16.0

2.00

10.0

Max

0.08

0.75

2.0

0.045

0.03

18.0

3.00

14.0

0.10

316L

Min

16.0

2.00

10.0

Max

0.03

0.75

2.0

0.045

0.03

18.0

3.00

14.0

0.10

316H

Min

0.04

0

0.04

16.0

2.00

10.0

Max

0.10

0.75

0.10

0.045

0.03

18.0

3.00

14.0

 

A4 70 Stainless Steel Bolt Mechanical Properties

Grade

Tensile Strength (MPa) min

Yield Strength

0.2% Proof

(MPa) min

Elong

(% in 50mm) min

Hardness

Rockwell B (HR B) max

Brinell (HB) max

A4-70

700

450

40

Not required

Not required

316

515

205

40

95

217

316L

485

170

40

95

217

316H

515

205

40

95

217

 

A4 70 Bolt Stainless Steel Physical Properties

Grade

Density

(kg/m³)

Elastic Modulus (GPa)

Mean Co-eff of Thermal Expansion (μm/m/°C)

Thermal Conductivity (W/m.K)

Specific Heat

0-100 °C (J/kg.K)

Elec Resistivity (nΩ.m)

0-100 °C

0-315 °C

0-538 °C

At 100 °C

At 500 °C

316/L/H

8000

193

15.9

16.2

17.5

16.3

21.5

500

740

 

A4 70 Bolt Stainless Steel Price List

View price list of Socket Head Cap Screw, Stud Bolt, Hex Bolt in A4-70 Stainless Steel

Material Price in India
A4-70 Bolts, DIN 912, M 20 X 50 INR 46/Pcs
A4-70 Nut Bolt Washer, DIN 931, A4-70 M 20 X 260 INR 182/Pcs

A4-70 Stainless Steel Bolts Weight Chart

Bolt Size

A (max)

B

C (min)

D

E

F

Thread Length

for Bolt Length

max

min

6″ and

shorter

over 6″

1/4″

0.260

7/16

0.484

11/64

0.03

0.01

0.750

1.000

5/16″

0.324

1/2

0.552

7/32

0.03

0.01

0.875

1.125

3/8″

0.388

9/16

0.620

1/4

0.03

0.01

1.000

1.250

7/16″

0.452

5/8

0.687

19/64

0.03

0.01

1.125

1.375

1/2″

0.515

3/4

0.826

11/32

0.03

0.01

1.250

1.500

5/8″

0.642

15/16

1.033

27/64

0.06

0.02

1.500

1.750

3/4″

0.768

1-1/8

1.240

1/2

0.06

0.02

1.750

2.000

7/8″

0.895

1-5/16

1.447

37/64

0.06

0.02

2.000

2.250

1″

1.022

1-1/2

1.653

43/64

0.09

0.03

2.250

2.500

1-1/8″

1.149

1-11/16

1.859

3/4

0.09

0.03

2.500

2.750

1-1/4″

1.277

1-7/8

2.066

27/32

0.09

0.03

2.750

3.000

1-3/8″

1.404

2-1/16

2.273

29/32

0.09

0.03

3.000

3.250

1-1/2″

1.531

2-1/4

2.480

1

0.09

0.03

3.250

3.500

1-3/4″

1.785

2-5/8

2.893

1-5/32

0.12

0.04

3.750

4.000

2″

2.039

3

3.306

1-11/32

0.12

0.04

4.250

4.500

2-1/4″

2.305

3-3/8

3.719

1-1/2

0.19

0.06

4.750

5.000

2-1/2″

2.559

3-3/4

4.133

1-21/32

0.19

0.06

5.250

5.500

2-3/4″

2.837

4-1/8

4.546

1-13/16

0.19

0.06

5.750

6.000

3″

3.081

4-1/2

4.959

2

0.19

0.06

6.250

6.500

3-1/4″

3.335

4-7/8

5.372

2-3/16

0.19

0.06

6.750

7.000

3-1/2″

3.589

5-1/4

5.786

2-5/16

0.19

0.06

7.250

7.500

3-3/4″

3.858

5-5/8

6.198

2-1/2

0.19

0.06

7.750

8.000

4″

4.111

6

6.612

2-11/16

0.19

0.06

8.250

8.500

Notes:

Body Diameter – There may be a reasonable swell or fin under the head or die seam on the body not to exceed the basic bolt diameter by the following:

  • 0.030″ for sizes up to 1/2″
  • 0.050″ for sizes 5/8″ and 3/4″
  • 0.060″ for sizes over 3/4″ to 1-1/4″
  • 0.090″ for sizes over 1-1/4″ to 2″
  • 0.120″ for sizes over 2″ to 3″
  • 0.190″ for sizes over 3″

 

A4-70/A4-80 STAINLESS STEEL HEX BOLT DIMENSIONS

Diameter

Load 1)Force at 0.2% yield point N

Initial Stressing ForceN

Tightening TorqueNm

Force in service N

Axial Static

Axial Dynamic

Radial Static or Dynamic

M3

2250

1420

0.9

610

360

120

M4

3960

2490

2.2

1070

640

210

M5

6390

4030

4.3

1730

1040

350

M6

9040

5700

7.3

2440

1470

490

M8

16470

10380

17.7

4450

2670

890

M10

26100

16440

35.5

7050

4230

1410

M12

37930

23900

61.3

10240

6150

2050

M16

70650

44510

147.1

19080

11450

3820

M20

110250

69460

285.1

29770

17860

5950

 

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