Chemical Compositions

Grade Material
Similar to..		 C
Max		 Mn
Max		 P
Max		 S
Max		 Si
Max		 Cr Ni Mo
A2 / B8 AISI 304 0.08 2.00 0.05 0.030 1.00 17.00-20.00 8.0-13.0 ---
A4 / B8M AISI 316 0.08 2.00 0.05 0.030 1.00 16.00-18.50 10.0-14.4 2.00-3.00

Physical Properties

Grade Standard Property Class Tensile Strength
Min.
(N/mm2)		 Yield Strength
0.2% Offset
Min.
(N/mm2)		 Elongation
After Fracture
AL mm
Min.
A2 & A4 ISO 3506 70 700 450 0.4d
80 800 600 0.3d
Grade Standard Property
 Class		 Diameter
 In.		 Tensile Strength
 Min.(KSI)		 Yield Strength
 0.2% Offset
 Min. (KSI)		 Elongation
 In 4D min.
 %		 Reduction
 Of Area Min
 %		 Hardness
 (Max.)
 Rockwell
B8 ASTM
A193
/A193M		 Class1 All 75 30 30 50 B96
Class2 To 3/4 125 100 12 35 C35
Over 3/4 to 1 115 80 15 35 C35
B8M Class1 All 75 30 30 50 B96
Class2 To 3/4 110 96 15 45 C35
Over 3/4 to 1 100 80 20 45 C35

Torsional Strength as Per ISO 3506

For Self Tapping Screw

Thread ST 2.2 ST 2.6 ST 2.9 ST 3.3 ST 3.5 ST 3.9 ST 4.2 ST 4.8 ST 5.5 ST 6.3 ST 8
Min Torsional
Strength Nm		 0.45 0.9 1.5 2 2.7 3.4 4.4 6.3 10 13.6 30.5

For Austenitic Bolts and Screws M1.6 to M16 (Coarse Thread)

Thread M1.6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M16
Min.
Breaking Torque,
Mbmin. --Nm		 Property
Class		 70 0.20 0.4 0.9 1.6 3.8 7.8 13 32 65 110 290
80 0.24 0.48 0.96 1.8 4.3 8.8 15 37 74 130 330

Note