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[China]
Address: #888 xingrong road, jiading district, Shanghai
Contact name:Frank
Shanghai Powermax Fastener Co., Ltd. |
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ASTM A320 L7 fully threaded UNC stud bolt for low temperature pipe fittings
ASTM A320 is a standard material specification covering alloy and stainless steel bolting materials for pressure vessels, valves, flanges, and fittings for low temperature services. ASTM A320 specification includes chemical composition, mechanical properties, dimensional reference standards, recommended nuts and washers for grades like L7, L43, B8, B8M, B8C, B8T and many others with notch toughness requirements.
Supplementary requirements includes Impact properties and hardness testing of class 2 bolting materials for ASME applications.
ASTM A320 Grades
L7 :13% Chromium Ferritic Steel
L7M :Chromium Molybdenum Alloy Steel, Quenched & Tempered
L43 :Chromium Molybdenum Alloy Steel, Quenched & Tempered
B8 :AISI 304 Stainless Steel, Carbide Solution Treated
B8 :Class 2 AISI 304 Stainless Steel, Carbide Solution Treated and
Strain Hardened
B8M :AISI 316 Stainless Steel, Carbide Solution Treated
B8M :Class 2 AISI 316 Stainless Steel, Carbide Solution Treated and
Strain Hardened
B8T :AISI 321 Stainless Steel, Carbide Solution Treated
B8T :Class 2 AISI 321 Stainless Steel, Carbide Solution Treated and
Strain Hardened
B8C :AISI 347 Stainless Steel, Carbide Solution Treated
Type :
Full threads, Partial Threads, and customized as per requirements.
SIZE :
Nom Dia: ¼ to 4″ [6-100 mm]
Tailor made if required.
Length: As Per Standard or Upto any Length
SPECIFICATION / STANDARD :ASTM / ASME / BS / DIN / BS EN ISO
MATERIAL :C.S., M.S., Alloy Steel, Ferritic & Austenitic Stainless Steel
THREADS :UNC, 8UN, UNF, Metric Coarse & Fine Series.
SURFACE FINISH :
Self Color, Hot Dip Galvanized, Electro Galvanized, Di-Chromated,
P.T.F.E. Coated or any other as per order requiremen
Packaging Details: a. bulk in cartons (<=25kg )+ 36CTN/wood solid Pallet
b. bulk in cartons 9"x9"x5" (<=18kg )+ 48CTN/wood solid Pallet
Supply Ability:1000 tons per month
MinimumOrder:200kgs for each specification
Trade Term:FOB/CIF/CFR/CNF/EXW/DDU/DDP
Payment :T/T, L/C , D/A , D/P , Western Union,etc
Market:South&north Amrica/Europe/ etc.
ASTM A320 Chemical Composition | ||||||
Element | Grade L7, L7M | Grade L43 | Grade B8 | Grade B8M | Grade B8T | Grade B8C |
Carbon | 0.38 - 0.48 | 0.38 - 0.43 | 0.08 max | 0.08 max | 0.08 max | 0.08 max |
Manganese, max | 0.75 - 1.00 | 0.75 - 1.00 | 2.00 max | 2 | 2 | 1 |
Phosphorus, max | 0.035 | 0.035 | 0.045 | 0.045 | 0.045 | 0.04 |
Sulfur, max | 0.04 | 0.04 | 0.03 | 0.03 | 0.03 | 0.03 |
Silicon | 0.15 - 0.35 | 0.15 - 0.35 | 1.00 max | 1 | 1 | 1.00 max |
Nickel | - | 0.40 - 0.70 | 8.0 - 11.0 | 10.0 - 14.0 | 9.0 - 12.0 | 8.00 - 11.00 |
Chromium | 0.80 - 1.10 | 0.40 - 0.60 | 18.0 - 20.0 | 16.0 - 18.0 | 17.0 - 19.0 | 18.0 - 20.0 |
Molybdenum | 0.15 - 0.25 | 0.20 - 0.30 | - | 2.0 - 3.0 | - | - |
Titanium | - | - | - | - | 5 x C, min | - |
ASTM A320 Recommended Nuts & Washers | ||
Bolt Grade | Nut Grade | Washer Grade |
L7 | ASTM A194 Grade 7 | ASTM F436 Type 1 |
L7M | ASTM A194 Grade 7M | ASTM F436 Type 1 |
L43 | ASTM A194 Grade 4 OR Grade 7 | ASTM F436 Type 1 |
B8 | ASTM A194 Grade 8 | AISI 304 |
B8M | ASTM A194 Grade 8M | AISI 316 |
B8T | ASTM A194 Grade 8T | AISI 321 |
B8C | ASTM A194 Grade 8C | AISI 347 |
