ASTM A325/A325M Type 1 Bolts, Stud Bolts, Threaded Rods

• Introduction
• Chemical Composition
• Mechanical Properties Metric Imperial
• Hardness Metric Imperial
• Recommended Nuts
• Recommended Washers
• Marking

ASTM A325/A325M Type 1 Bolts, Stud Bolts, Threaded Rods

ASTM A325 Type 1 Bolts are manufactured in heavy hex bolt from carbon steel, carbon boron steel, alloy steel or alloy boron steel. A325 type 1 bolts are intended for used in structural connections. Metric size ASTM A325M Type 1 Bolts are produced from M12 to M36 & imperial A325 Type 1 bolts are produced from 1/2" to 1-1/2". FerroBend manufactures and supplies ASTM A325 Type 3 heavy hex bolts with EN 10204 Type 3.1 Certification.

ASTM A325 Type 1 Chemical Composition

Element
	Product Analysis %
	Carbon Steel	Carbon Boron Steel	Alloy Steel	Alloy Boron Steel
Carbon	0.28 - 0.55	0.28 - 0.55	0.28 - 0.55	0.28 - 0.55
Manganese	0.57 min	0.57 min	0.57 min	0.57 min
Phosphorus	0.048 max	0.048 max	0.040 max	0.040 max
Sulfur	0.058 max	0.058 max	0.045 max	0.045 max
Silicon	0.13 - 0.32	0.08 - 0.32	0.13 - 0.37	0.13 - 0.37
Boron	--	0.0005 - 0.003	--	0.0005 - 0.003

ASTM A325M Type 1 Mechanical Requirement (Metric)

Nominal Diameter, mm	Tensile Strength, min, Mpa	Yield Strength, min, Mpa		Elongation in 4D, min, %		Reduction in Area, min, %
		M12 to M36, Inclusive	830	660	14		35

ASTM A325 Type 1 Mechanical Requirement (Imperial)

Nominal Diameter, mm	Tensile Strength, min, ksi	Yield Strength, min, ksi		Elongation in 4D, min, %		Reduction in Area, min, %
		1/2" to 1", Inclusive	120	92	14		35
Over 1 to 1-1/2"	105	81	14	35

ASTM A325M Type 1 Bolts Hardness Requirement (Metric)

Bolt Size, mm	Bolt Length, mm
		Brinell		Rockwell C
		Min	Max	Min	Max
M12 to M24, inclusive	Less than 2D 2D and over	253 --	319 319	25 --	34 34
M25 to M36, Inclusive	Less than 3D 3D and over	253 --	319 319	25 --	34 34

ASTM A325 Type 1 Bolts Hardness Requirement (Imperial)

Bolt Size, Inch	Bolt Length, Inch
		Brinell		Rockwell C
		Min	Max	Min	Max
1/2" to 1", inclusive	Less than 2D 2D and over	253 --	319 319	25 --	34 34
1-1/8" to 1-1/2", inclusive	Less than 3D 3D and over	223 --	286 286	19 --	30 30

where D is nominal diameter or thread size

Recommended Nuts

Bolt Type and Finish	Nut Class & Finish Specification
		Plaing (Non Coated)	ASTM F563/F563M Grade 8S or 8S3, Plain (Non Coated)
Zinc Coated	ASTM F563/F563M Grade 10S, Zinc Coated
Coated in accordance with ASTM F1136M, Grade 3	ASTM F563/F563M Grade 10S, Coated in accordance with ASTM F1136
Plain	ASTM F563/F563M Grade 8S3, Plain

Recommended Washers

Bolt Type and Finish	Washer Finish
		Plaing (Non Coated)	ASTM F436/F436M, Plain (Non Coated)
Zinc Coated	ASTM F436/F436M, Zinc Coated
Coated in accordance with ASTM F1136M, Grade 3	ASTM F436/F436M, Coated in accordance with ASTM F1136
Plain	ASTM F436/F436M, Plain

ASTM A325 Type 1 Bolt Marking

Grade	Marking Details
		Type 1	Type 1 bolts shall me marked "A325M" and "8S". In addition, bolts marked "8.8S" shall be an acceptable marking provided they also meet the requirements of ISO 7412.