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Duplex DIN7991 Countersunk Head Socket Screw
Duplex DIN7991 Countersunk Head Socket Screw Duplex DIN7991 Countersunk Head Socket Screw
Duplex DIN7991 Countersunk Head Socket Screw Duplex DIN7991 Countersunk Head Socket Screw
Duplex DIN7991 Countersunk Head Socket Screw Duplex DIN7991 Countersunk Head Socket Screw
Duplex DIN7991 Countersunk Head Socket Screw Duplex DIN7991 Countersunk Head Socket Screw

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Duplex DIN7991 Countersunk Head Socket Screw

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What is DIN 7991?

DIN 7991 countersunk socket screw features
Hexagon socket: facilitates tightening and untightening with an Allen key. Metric thread: available in metric ISO thread from M3 to M24 to suit different applications.
It has steel one with grade of 8.8 and 10.9. Stainless one has grade A2-70 and A4-70. Duplex 2205 with grade of D6-80 and dupler duplex 2507 with grade of 80,and also, it has grade of 1.4529 with A8-80, and grade 254smo, 904L and C276 and so on.
  • DIN7991

  • HT&FST

  • DPDIN7991M12X60

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Availability:
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Duplex  DIN7991 Hexagon socket Countersunk Head cap Screw

Name

Hex socket Countersunk Head cap Screw

Standard

DIN7991

Size Range

M3-M24

Finish

Bright&Clean

Marking

HT&FST or customization

Material

Duplex 2205 & Super duplex 2507 & S32760

Grade

Grade 80

Certificates

EN10204-3.1B

Non-standards

OEM is available, according to drawing or samples

Samples

Samples available

Package

Bulk in box and then in cartons, then on pallets,

or according to customers' requirement.

Payment T/T,Western Union


Duplex 2205

UNS

ID

JIS

W.Nr

S31803 F51 SUS32953L 1.4462


Chemical composition of stainless steel 2205 bolts

Alloy % Ni Cr Fe Mo N C Mn Si S
P
2205 Min. 4.5
21 Bal 2.5 0.08




Max. 6.5 23 3.5 0.2 0.03 2 1 0.02 0.03


Minimum mechanical properties of duplex stainless steel F51 (S31803/2205/1.4462) nut alloy at room temperature

Tensile strength Rm N/mm2 Yield strength RP0.2 N/mm2 Elongation rate A5% Brinell hardness HB
620 450 25 290

Super Duplex 2507


UNS

ID

AISI/ASTM

W.Nr

S32750 F53 2507 1.4410



Chemical composition of Super Duplex 2507


Alloy % Ni Cr Mo N C Mn Si S P Cu
2507
Min. 6.0 24 3.0 0.24 0.08




Min. 8.0 26 5.0 0.32 0.03 1.2 0.08 0.02 0.035 0.5



Minimum mechanical properties of alloy for Super Duplex 2507 at room temperature


Tensile strength Rm N/mm2 Yield strength RP0.2 N/mm2 Elongation rate A5% Brinell hardness HB
800 550 15 310



Super Duplex S32760

UNS ID W.Nr
S32760 F55 1.4501


Chemical composition of duplex stainless steel F55 (S32760/1.4501) nut

Alloy % Ni Cr Mo N C Mn Si S P Cu W
F55

Min.

6.0 24 3.0 0.2




0.5 0.5
Max. 8.0 26 4.0 0.3 0.03 1.0 1.0 0.01 0.03 1.0 1.0


Minimum mechanical properties of duplex stainless steel F55 (S32760/1.4501) nut alloy at room temperature

Tensile strength

Rm N/mm²

Yield strength

RP0.2 N/mm²

Elongation rate

A5%

820 550 25



HOT PRODUCTS

Size Range:
Diameter M5 - M64 ; 1/4"- 2 1/2" 
Length:10-1000mm ; 1/2"-40"
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Size Range:
Diameter M5 - M64 ; 1/4"- 2 1/2" 
Length:10-1000mm ; 1/2"-40"
0
0
Size Range:
Diameter M5 - M64 ; 1/4"- 2 1/2" 
Length:10-1000mm ; 1/2"-40"
0
0
Size Range:
Diameter M5 - M64 ; 1/4"- 2 1/2" 
Length:10-1000mm ; 1/2"-40"
0
0
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