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[China]
Trade Verify
Address: No.101 Shijing East Road, Tudian Town, Tongxiang, China
Contact name:Denny
NEW-ERA STEEL TUBE TECHNOLOGY CO.,LTD |
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ASTM A193 B8 B8m , Zinc Plated Galvanized B7 , M3-M120 DIN975 DIN976 Threaded steel Rods
ASTM A193 B8 B8m/Zinc Plated Galvanized B7/M3-M120 DIN975 DIN976
Steel China LaiWu XinCheng
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 | - |
| Over 4 - 7 | 100 | 75 | 18 | 50 |
4. Surface protection: Plain, Hot dip galvanized, Galvanization,
Dacroment, Xylan .
5. Packing: Standard packing or According to custome
6. Payment terms: T/T or L/ C
(1)30% paid by T/T and rest 70% by T/T upon the copy of B/B.
(2)100% irrevocable L/C at sight
7. MOQ:5tons
8. Delivery time:7-30 days upon to the order details
9. Trade term: FOB CFR CIF
10. Port of loading: shanghai, China
11. Mark: including steel material, heat No., pieces, weight, date and so on.
