ASTM A320 L7 Full Threaded Rod / ASTM A320 L7 Alloy Steel

• Material: High Strength Steel
• Type: Round Head
• Head Style: Round
• Standard: DIN, ANSI, GB, JIS, BSW, GOST, A320 L7 L7m
• Grade: A320 L7 L7m
• Application: Machinery, Chemical Industry, Environmental, Building, Oil and Gas
• Model NO.: astm a320 l7
• Finish: Black
• commodity: A320 L7 Threaded Rods
• Types: Full Threaded Rod
• Property: A320 L7
• Other Grade: A193 B7 B7m, A320 L7, L7m, L43...
• Transport Package: Wooven Cloth, Then Pallet
• Specification: 1/4′′ to 4′′
• Origin: China
• HS Code: 73181900
• Production Capacity: 3000tons/Month

Product Description

astm a320 l7 Full Threaded Rod / ASTM A320 L7 Alloy steel

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. 

1.Specifications and materials 

dentification	L7, L7M, L70	L7A, L71	L7B, L72	L43
Grade	Chromium- Molybdenum  (AISI 4140, 4142, or 4145)	Carbon- Molybdenum  (AISI 4037)	Chromium-  Molybdenum  (AISI 4137)	Nickel-Chromium-  (AISI 4340)

2.Chemical composition of A320 L7 steels.:

Element	L7 (AISI 4140)	L43 (AISI 4340)	B8 (AISI 304)	B8M (AISI 316)
Carbon	0.37 - 0.49%	0.38 - 0.43%	0.08% max	0.08% max
Manganese	0.65 - 1.10%	0.75 - 1.00%	2.00% max	2.00% max
Phosphorus, max	0.04%	0.04%	0.05%	0.05%
Sulfur, max	0.04%	0.04%	0.03%	0.03%
Silicon	0.15 - 0.35%	0.15 - 0.35%	1.00% max	1.00% max
Chromium	0.75 - 1.20%	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%

3.Mechanical properties of A320 L7,L7ML43 and so on..

Grade and Class	Diameter	Heat Treatment	Tensile Str  Min KSI	Yield Str 0.2% Offset KSI	Elongation  in 2in. Min, %	Reduction of  Area Min, %	Hardness  max
FERRITIC STEELS
L7, L7A, L7B, L7C, L70,  L71, L72, L73	2-1/2" and under	quench and tempered	125	105	16	50
L43	4" and under	quench and tempered	125	105	16	50
L7M	2-1/2" and under	quench and tempered  @ 1150F, min	100	80	18	50	235 HB / 99HRB
L1	1" and under	quench and tempered	125	105	16	50
AUSTENTIC STEELS
CLASS 1: B8, B8C, B8M,  B8P, B8F, B8T, B8LN, B8MLN	ALL	carbide solution treated	75	30	30	50	223 HB or 96 HRB
CLASS 1A: B8A, B8CA,  B8MA, B8PA, B8FA, B8TA,  B8LNA, B8MLNA	ALL	carbide solution treated	75	30	30	50	192 HB or 90 HRB
CLASS 2: B8, B8C, B8P, B8F, B8T	3/4" and under	carbide solution treated  and strain hardened	125	100	12	35	321 HB or 35 HRC
	over 3/4 to 1" incl		115	80	15	30	321 HB or 35 HRC
	over 1" to 1-1/4" incl		105	65	20	35	321 HB or 35 HRC
	over 1-1/4" to 1-1/2" incl		100	50	28	45	321 HB or 35 HRC
CLASS 2: B8M	3/4" and under	carbide solution treated  and strain hardened	110	95	15	45	321 HB or 35 HRC
	over 3/4 to 1" incl		100	80	20	45	321 HB or 35 HRC
	over 1" to 1-1/4" incl		95	65	25	45	321 HB or 35 HRC
	over 1-1/4" to 1-1/2" incl		90	50	30	45	321 HB or 35 HRC

4.Sizes we can also for full Threaded rods: 1/4'' to 4''

5.MOQ: Normally we don't have any MOQ requirements, because we produce threaded rods for big quantity every month

6.Delivery time : 7-30 days upon to the sizes & quantity.

7.Paytemtn term: TT or LC, West union ...

8.Quantity control:

We company have good QC inspection tear and full set of inspect equipment including: UT test machine, Tensile testing machine,Hardness testing machine,Dimensional measuring instrument,f,spectrometer,Metallographic microscope and so on, so that we can always supply good mateterials for various projects and industries , if you have any need for our producrs,please contact us freely.

Ms.Phoebe Chen