Home Companies Jiaxing City Qunbang Hardware Co., Ltd

ANSI A320 L7 Carbon Steel Fully Threaded Studs

Contact Us

[China]

Trade Verify

Address: No.375,Tongle Road,Jiaxing City,Zhejiang Province,China

Contact name:Lance

Jiaxing City Qunbang Hardware Co., Ltd

Verified Suppliers

Trust
Seal
Verified
Supplier
Credit
Check
Capability
Assessment

ANSI A320 L7 Carbon Steel Fully Threaded Studs

Country/Region	china
City & Province	jiaxing zhejiang
Categories	Bolts

Product Details

ANSI A320 L7 Carbon Steel Fully Threaded Studs

Originally approved in 1948, the ASTM A320 specification covers alloy steel and stainless steel bolting materials for low temperature service. This standard covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts used for pressure vessels, valves, flanges, and fittings. Like the ASTM A193 specification, unless otherwise specified, the 8UN thread series is specified on fastener larger than 1” in diameter.

Below is a basic summary of a few of the common grades within the ASTM A320 specification. A number of other less common grades of ASTM A320 exist, but not covered in the description below.

Screw Thread
d

d
PP	UNC
	UNF
	8UN
u	max	UNC
		UNF
		8UN

0.2500	0.3125	0.3750	0.4375	0.5000	0.5625	0.6250	0.7500	0.8750	1.0000	1.1250	1.2500	1.3750
20	18	16	14	13	12	11	10	9	8	7	7	6
28	24	24	20	20	18	18	16	14	12	12	12	12
-	-	-	-	-	-	-	-	-	-	8	8	8
0.100	0.111	0.125	0.143	0.154	0.167	0.182	0.200	0.222	0.250	0.286	0.286	0.333
0.071	0.083	0.083	0.100	0.100	0.111	0.111	0.125	0.143	0.167	0.167	0.167	0.167
-	-	-	-	-	-	-	-	-	-	0.250	0.250	0.250

Screw Thread
d

d
PP	UNC
	UNF
	8UN
u	max	UNC
		UNF
		8UN

1.5000	1.6250	1.7500	1.8750	2.0000	2.2500	2.5000	2.7500	3.0000	3.2500	3.5000	3.7500	4.0000
6	-	5	-	4-1/2	4-1/2	4	4	4	4	4	4	4
12	-	-	-	-	-	-	-	-	-	-	-	-
8	8	8	8	8	8	8	8	8	8	8	8	8
0.333	-	0.400	-	0.444	0.444	0.500	0.500	0.500	0.500	0.500	0.500	0.500
0.167	-	-	-	-	-	-	-	-	-	-	-	-
0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250

A320 Grades

L7 Alloy steel	AISI 4140/4142 Quenched and tempered
L43 Alloy steel	AISI 4340 Quenched and tempered
B8 Class 1 Stainless steel	AISI 304, carbide solution treated
B8M Class 1 Stainless steel	AISI 316, carbide solution treated
B8 Class 2 Stainless steel	AISI 304, carbide solution treated, strain hardened
B8M Class 2 Stainless steel	AISI 316, carbide solution treated, strain hardened

A320 Mechanical Properties

Grade	Diameter	Tensile, ksi, min	Yield, ksi, min	Charpy Impact 20-ft-lbf @ temp	Elong, %, min	RA, %, min
L7	Up to 21⁄2	125	105	-150° F	16	50
L43	Up to 4	125	105	-150° F	16	50
Class 1: BC, B8C, B8M, B8P, B8F, B8T, B8LN, B8MLN	All	75	30	N/A	30	50
Class 1A: B8A, B8CA, B8MA, B8PA, B8FA, B8TA, B8LNA, B8MLNA	All	75	30	N/A	30	50
Class 2: B8, B8C, B8P, B8F, B8T	Up to 3⁄4	125	100	N/A	12	35
	7⁄8 - 1	115	80	N/A	15	35
	11⁄8 - 11⁄4	105	65	N/A	20	35
	13⁄8 - 11⁄2	100	50	N/A	28	45
Class 2: B8M	Up to 3⁄4	110	95	N/A	15	45
	7⁄8 - 1	100	80	N/A	20	45
	11⁄8 - 11⁄4	95	65	N/A	25	45
	13⁄8 - 11⁄2	90	50	N/A	30	45

A320 Chemical Properties

Element	L7 (AISI 4140)	L43 (AISI 4340)	B8 (AISI 304)	B8M (AISI 316)
Carbon	0.38 - 0.48%	0.38 - 0.43%	0.08% max	0.08% max
Manganese	0.75 - 1.00%	0.75 - 1.00%	2.00% max	2.00% max
Phosphorus, max	0.035%	0.035%	0.045%	0.045%
Sulfur, max	0.040%	0.040%	0.030%	0.030%
Silicon	0.15 - 0.35%	0.15 - 0.35%	1.00% max	1.00% max
Chromium	0.80 - 1.10%	0.70 - 0.90%	18.0 - 20.0%	16.0 - 18.0%
Nickel		1.65 - 2.00%	8.0 - 11.0%	10.0 - 14.0%
Molybdenum	0.15 - 0.25%	0.20 - 0.30%		2.00 - 3.00%

A320 Recommended Hardware

Grade	Nuts	Washers
L7	A194 Grade 4 or 7	F436
L43	A194 Grade 4 or 7	F436
B8 Class 1	A194 Grade 8	SS304
B8M Class 1	A194 Grade 8M	SS316
B8 Class 2	A194 Grade 8	SS304
B8M Class 2	A194 Grade 8M	SS316
Strain hardened nuts available as a supplementary requirement

Specification

A threaded rod, also known as a stud, is a relatively long rod that is threaded on both ends; the thread may extend along the complete length of the rod. They are designed to be used in tension. Threaded rod in bar stock form is often called all-thread.

All thread rod, commonly referred to as fully threaded rod, redi-rod, continuously threaded rod, TFL rod, and abbreviated ATR is used for general purpose fastening for anything from an anchor bolt to a through bolt. A variety of grades and materials are available.

Materials and Chemical compstition

42CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.42	0.27	0.92	0.013	0.004	1.01	0.03	0.04	0.2

stainless steel

	化学成分CHEMICAL COMPOSI(% )
Type	C碳	Si硅	Mn锰	P磷	S硫	Ni镍	Cr铬	Mo钼	Cu铜	Others
Type	≤	≤	≤	≤	≤	≥	≥	≥	≈
201Cu	0.08	1.00	7.5-10	0.06	0.03	4.00-6.00	14.0-17.0		2.0-3.0
201	0.15	1.00	8.50	0.06	0.03	3.50-5.50	16.0-18.0			N≤0.25
130M/202	0.15	1.00	7.5-10	0.06	0.03	4.00-6.00	17.0-19.0			N≤0.25
202	0.15	1.00	7.5-10	0.06	0.03	4.00-6.00	17.0-19.0
301	0.15	1.00	2.00	0.045	0.03	5.00-8.00	16.0-18.0
302	0.15	1.00	2.00	0.045	0.03	8.00-10.0	17.0-19.0
XM7 (302HQ)	0.08	1.00	2.00	0.045	0.03	8.50-10.5	17.0-9.00		3.0-4.0
303	0.15	1.00	2.00	0.20	≥0.15	8.00-10.0	17.0-19.0	≤0.60
303Cu	0.15	1.00	3.00	0.20	≥0.15	8.0-10.0	17.0-19.0	≤0.60	1.5-3.5
304	0.08	1.00	2.00	0.045	0.03	8.00-10.0	18.0-20.0
304H	0.08	1.00	2.00	0.045	0.03	8.0-10.0	18.0-20.0
304HC	0.08	1.00	2.00	0.045	0.03	8.00-10.0	17.0-19.0		2.0-3.0
304HCM	0.08	1.00	2.00	0.045	0.03	8.0-10.0	17.0-19.0		2.5-4.0
304L	0.03	1.00	2.00	0.045	0.03	9.0-13.0	18.0-20.0
304M	0.06	1.00	2.00	0.045	0.03	8.50-10.0	18.0-20.0
305	0.12	1.00	2.00	0.045	0.03	10.5-13.0	17.0-19.0
305J1	0.08	1.00	2.00	0.045	0.03	11.0-13.5	16.5-19.0
309S	0.08	1.00	2.00	0.045	0.03	12.0-15.0	22.0-14.0
310S	0.08	1.50	2.00	0.045	0.03	19.0-22.0	24.0-26.0
314	0.25	15.-3.0	2.00	0.040	0.03	19.0--22.0	24.0-26.0
316	0.08	1.00	2.00	0.045	0.03	10.0-14.0	16.0-18.0	2.0-3.0
316Cu	0.03	1.00	2.00	0.045	0.03	10.0-14.0	16.0-18.0	2.0-3.0	2.0-3.0
316L (12Ni)	0.03	1.00	2.00	0.045	0.03	12.0-15.0	16.0-18.0	2.0-3.0
316L (10Ni)	0.03	1.00	2.00	0.045	0.03	10.0-14.0	16.0-18.0	2.0-3.0
321	0.08	1.00	2.00	0.045	0.03	9.00-13.0	17.0-19.0			Ti≤5*C%
410	0.15		1.00		0.03		11.5-13.5
416	0.15		1.25		≥0.15		12.0-14.0
420	0.26-0.4		1.00		0.03		12.0-14.0
410L	0.30	1.00	1.00	0.040	0.03		11.5-13.5
430	0.12	0.75	1.00	0.040	0.03		16.0-18.0
430F	0.12	1.00	1.25	0.060	0.15		16.0-18.0
631(J1)	0.09	1.00	1.00	0.040	0.03	6.50-8.50	16.0-18.0			AL 0.75-1.5
2520	0.08	1.00	2.00	0.035	0.03	19.0-22.0	24.0-26.0
410	0.015	1.00	1.00	0.04	0.03		11.5-13.5

Finish

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

The advantages of QBH

QBH brand sales to the main quality assurance.
Years of export trade management, excellent service, word-of-mouth guarantee.
By working with TUV,escort for quality.
Customization of non-standard parts can be made according to customer's requirements and drawings.
For quality customers,we can provide a certain credit period.