ASTM A325/A325M Type 3 Bolts, Stud Bolts, Threaded Rods

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

ASTM A325/A325M Type 3 Bolts, Stud Bolts, Threaded Rods.

ASTM A325 Type 3 Bolts are weathering steel type intended for used in structural connections. Metric size bolts are produced from M12 to M36 as per ASTM A325M Type 3 & imperial size bolts are produced from 1/2" to 1-1/2" as per ASTM A325 Type 3. We use weathering steel type carbon steel for producing A325 Type 3 Bolting. FerroBend manufactures and supplies ASTM A325 Type 3 heavy hex bolts with EN 10204 Type 3.1 Certification.

ASTM A325 Type 3 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 A325 Type 3 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 3 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 A325 Type 3 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 3 Bolts Hardness Requirement (Imperial)

Bolt Size, mm	Bolt Length, mm
		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 3 Bolt Marking

Grade	Marking Details
		Type 3	Type 1 bolts shall me marked "A325M" and "8S3". In addition, bolts marked "8.8S" shall be an acceptable marking provided they also meet the requirements of ISO 7412. The use of additional distinguishing marks to indicate the bolts are weathering steel shall be the manufacturer's discretion.