1. Material
ASTM A178 GrD is a carbon-manganese steel electric resistance welded pipe material used for boilers, boiler flow, superheaters, etc.1. The steel covered by the ASTM A178 specification is divided into Grade A (low carbon steel), Grade C (medium carbon steel) and Grade D (carbon-manganese steel), among which GrD belongs to the carbon-manganese steel category.
2. Composition requirements
The steel should meet the specified carbon, manganese, phosphorus, sulfur and silicon composition, but the search results do not mention the specific composition content range of GrD.
3. Production process requirements
All pipes should be heat treated after welding and then cooled.
4. Performance requirements
GrD should meet the given tensile requirements, namely tensile strength, yield strength and elongation. The specification also gives the minimum elongation value, but the search results do not mention the specific numerical requirements.
5. Test requirements
The material is subject to flat, flange, tension, reverse flat and hydrostatic (or non-destructive) tests. If the buyer requires, a crushing test should also be performed.
6. Application
ASTM A178 GrD is mainly used in boiler tubes, boiler flow, superheater flow and safety ends. Due to its good performance, it can meet the strength and temperature resistance requirements of these application scenarios.
