China DIN 976-1 Type B A2 Stud Bolts ASTM A193 Grade B8 Stud Bolts manufacturer
DIN 976-1 Full thread bolt SS304,A2-70 stud bolt
ASTM A193 Grade B8 Stud Bolts are high strength 304 stainless steel bolts, coupled with pair of A194-8 nuts for bolting carbon and stainless steel pipelines. Boltport is a manufacturer and supplier of fully threaded, tap end and double end stud bolts in ASTM A193 Grade B8 Class 1, Class 2 & Class 2B specification. We offer b8 stud bolts in both metric and imperial sizes with coarse, fine & extra fine threads. A193 B8 stud bolts & A194 Gr.8 Hex nuts are produced with full compliance to all requirements of ASTM A193 Grade B8 specification and supplied with 3.1 certificate.
DIN 976-1 – 2016 Fasteners – Stud bolts – Part 1: Metric thread
| ①,Material available: a)Steel, Property class (material): d＜3mm: subject to agreement; 3mm≤d≤39mm: 4.8,5.6,5.8,8.8,10.9,12.9; d＞39mm: subject to agreement. Standard DIN EN ISO 898-1 b)Stainless steel, Property class (material): d＜3mm: subject to agreement; 3mm≤d≤24mm: A2-70，A4-70; d＞24mm: subject to agreement. Standard DIN EN ISO 3506-1 c)Non-ferrous metal, Property class (material): CuZn=copper-zinc alloy，CU2 or CU3 at the discretion of the manufacturer；Al=aluminum alloy，AL1（AlMg3） or AL2（AlMg5） at the discretion of the manufacturer. Standard DIN EN 28839 |
- The DIN 976 A2-70 stud bolt is made of stainless steel 304, which features strength and offers good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. They have superior rust resistance and the excellent of oxidation resistance, which can ensure long time using and prolong product lifespan.
- A large diameter range from M2 to M72 is available and some special thread sizes, such as M7, M14, M27, M33 and M39 could be offered. And the available range of bolt length could be 3000mm maximally.
- Each size of DIN 976 A2-70 stud bolt could be made according to buyer’s requirement, such as end shape, thread length and even to drill holes on ends or body.
| 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 |
ASTM A193 B8, B8A CHEMICAL COMPOSTION
| IDENTIFICATION | B8, B8A | B8C, B8CA | ||
|---|---|---|---|---|
| Grade | Unstabilized 18 chromium – 8 Nickel (Type 304 Stainless) | Stabilized 18 Chromium- 8 Nickel (Type 347 Stainless) | ||
| Element | Range | Tolerance +/- | Range | Tolerance +/- |
| Carbon, max | 0.08 | 0.01 over | 0.08 | 0.01 over |
| Manganese, max | 2.00 | 0.04 over | 2.00 | 0.04 over |
| Phosphorus, max | 0.045 | 0.010 over | 0.045 | 0.010 over |
| Sulfur, max | 0.030 | 0.005 over | 0.030 | 0.005 over |
| Silicon | 1.00 | 0.05 over | 1.00 | 0.05 over |
| Chromium | 18.00 – 20.00 | 0.20 | 17.00 – 19.00 | 0.20 |
| Nickel | 8.00 – 10.50 | 0.15 | 9.00 – 13.00 | 0.15 |
| Molybdenum | – | |||
| Columbium + Tantalum | – | 10x carbon, min | 0.05 under |
A2-70 Stainless Steel Fastener is recognized by 2 ways, A2 which describe it as being from SS 304 family and 70 which classifies its strength. When we say A2-70 it generally means that the bolt / screw is from SS 304 grade and has an ultimate tensile strength as 70 kg or 700 n/mm2.
ISO 3506-1 Grade A2-70
| A2-70 |  | Hex bolts, screws, stud bolts, double ended studs, full thread rods, full threaded studs |
ISO 3506-1 Grade A Series Chemical properties
A2 Stud bolt composition
HOW TO ORDER OUR DIN 976-1 A2-70 STUD BOLT?
EXAMPLE #1 Stud bolt full Thread,DIN 976-1 A2-70 M 20X1000
Stud bolt full Thread, SS304,DIN 976, Threaded pin, M 39×1000, A2-70