Name: Dacromet Nickel Threaded Steel Rod ASTM A193 Standard B8 B8m Grade
Brand: NEW-ERA
Price: 1 USD

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Dacromet / Nickel Threaded Steel Rod ASTM / A193 Standard B8 / B8m Grade

Brand Name:NEW-ERA

Certification:ISO9001/TS16949

Model Number:M3-M120

Minimum Order Quantity:1000kg

Delivery Time:20-30days

Payment Terms:L/C, T/T

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NEW-ERA STEEL TUBE TECHNOLOGY CO.,LTD

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Address: No.101 Shijing East Road, Tudian Town, Tongxiang, China

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ASTM A193 B8 B8m Zinc Plated Galvanized threaded steel rod B7 M3-M120 Steel Threaded Rods

ASTM A193 B8 B8m/Zinc Plated Galvanized B7/M3-M120 DIN975 DIN976 Steel China
ASTM A193: B7, B7M, B16, B8 class 1, B8 class 2, B8M class 1, B8M class 2, B8T etc.
ASTM A320: L7, L7M, L43, B8 class 1, B8 class 2, B8M class 1, B8M class 2, B8T etc.
Sizes:1/4'' to 4''

1. Know A193 B7 & A193 B7M

1) ASTM A193 is alloy steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
Material according to ASTM A193 B7 is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.

2) ASTM A193 Grade B7M bolts and studs are identical in chemistry to Grade B7 (quenched and tempered medium carbon alloy steel), but have lower strength requirements and require 100% hardness testing of all fasteners manufactured in the lot. Grade B7M bolts resist chloride, sulfide, and hydrogen stress corrosion cracking (SCC) and are frequently used in sour gas service.

2. A193 B7 & A193 B7M Raw material chemical composition

Element	B7 / B7M (AISI 4140)
Carbon	0.38 - 0.48%
Manganese	0.75 - 1.00%
Phosphorus, max	0.04%
Sulfur, max	0.04%
Silicon	0.15 - 0.35%
Chromium	0.80 - 1.10%
Nickel
Molybdenum	0.15 - 0.25%

3.. A193 B7 & A193 B7M Property

Grade	Sizes	Tensile ksi, min	Yield, ksi, min	Elong, %, min	RA % min	HBW	HRC
A193 B7	Up to 2-1/2	125	105	16	50	321 max	35 max
	2-5/8 - 4	115	95	16	50
	4-1/8 - 6	100	75	18	50

B7M	Up to 4	100	80	18	50	235 max	-
B7M	Over 4 - 7	100	75	18	50	235 max	-

Grade	Size	Tensile ksi, min	Yield, ksi, min	Elong, %, min	RA % min
B7	Up to 2-1/2	125	105	16	50
	2-5/8 - 4	115	95	16	50
	4-1/8 - 7	100	75	18	50
B8 Class 1	All	75	30	30	50
B8M Class 1	All	75	30	30	50
B8 Class 2	Up to 3/4	125	100	12	35
	2007/8/1	115	80	15	35
	1-1/8 - 1-1/4	105	65	20	35
	1-3/8 - 1-1/2	100	50	28	45
B8M Class 2	Up to 3/4	110	95	15	45
	2007/8/1	100	80	20	45
	1-1/8 - 1-1/4	95	65	25	45
	1-3/8 - 1-1/2	90	50	30	45
B16	Up to 2-1/2	125	105	18	50
	2-5/8 - 4	110	95	17	45
	4-1/8 - 7	100	85	16	45