Metric Grades Steel Bolts

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Class	Head Marking	Size Range (mm)	Minimum Proof Strength (106 Pa)	Minimum Tensile Strength (106 Pa)	Material
4.6		M5 - M36	225	400	Low or medium carbon steel
4.8		M1.6 - M16	310	420	Low or medium carbon steel
5.8		M5 - M24	380	520	Low or medium carbon steel
8.8		M16 - M36	600	830	Medium carbon steel, Q & T
9.8		M1.6 - M16	650	900	Medium carbon steel, Q & T
10.9		M5 - M36	830	1040	Low carbon martensite steel, Q & T
12.9		M1.6 - M36	970	1220	Alloy steel, Q & T

• 1 Pa = 1 N/m² = 1.4504x10^-4 lb/in² (psi)

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Related Topics

• Mechanics - Kinematics, forces, vectors, motion, momentum, energy and the dynamics of objects

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