stud bolt and nut

product detail                                                                                                                     ASTM A193   Scope   Originally approved in 1936, this specification is heavily utilized in petroleum and chemical construction applications. The ASTM standard covers alloy steel and stainless steel bolting materials for high temperature or high pressure service. This specification includes fasteners intended for use in pressure vessels, valves, flanges, and fittings. Although, this material 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.   Below is a basic summary of a few of the common grades. ASTM A193 covers a number of other standard specifications not covered in this description including B5, B6, and B16.   Recommended coating                                                                                                     Oxid black, Hot dip galvanized, Zinc plated, Cad-plated, Blue TPFE Coated(Blue XYLANE 1014,1424), Green TPFE Coated(Green XYLANE 1014,1424).FEFLON coated                                                                                                 

Standard	DIN	ANSI/ASME	GB	JIS	NON-STANDARD
Size	Dia. M5-M100,1/4 above
Material	Carbon steel, stainless steel, alloy steel
Grade	4.8, 8.8, 10.9, 12.9,GR5,GR8,GR10
Finish	Plain, Y.Z.P., Black, Z.P.HDG  plated,PTFE,CAD PLATED
Certificate	ISO9001:2008 , TS16949
Name	Stud Bolt

      Grades                                                                                                                            

B7	Alloy steel, AISI 4140/4142 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

  Mechanical Properties

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
	7/8 - 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
	7/8 - 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

Chemical Properties

Element	B7 (AISI 4140)	B8 (AISI 304)	B8M (AISI 316)
Carbon	0.37 - 0.49%	0.08% max	0.08% max
Manganese	0.65 - 1.10%	2.00% max	2.00% max
Phosphorus, max	0.035%	0.045%	0.045%
Sulfur, max	0.040%	0.030%	0.030%
Silicon	0.15 - 0.35%	1.00% max	1.00% max
Chromium	0.75 - 1.20%	18.0 - 20.0%	16.0 - 18.0%
Nickel		8.0 - 11.0%	10.0 - 14.0%
Molybdenum	0.15 - 0.25%		2.00 - 3.00%

Recommended Nuts and Washers

Bolt Grade	Nuts	Washers
B7	A194 Grade 2H	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

   company profile                                                                                           Shanghai Jinrui Norm Parts Supplies Co., Ltd. is specialized in producing fastening pieces and other norm parts supplies. Shanghai Jinrui owns Shanghai Xingrui Bolt factory and Shanghai Xingrui Wire steel factory.  We have many cold-heading machines, nut machines and hot-heading machines. Our company has certificates of ISO9001 and TS 16949, and we can manufacture fasteners in accordance with GB, DIN, ANSI, JIS, ISO and customer’s requirements with favorable price.
      Product Equipment                                                                                                                                                                                Test Equipment                                                                                                              
  mode of transportation& Packaging                                                                                                                
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