Technical requirements and standards for Cast Iron Round Bars can vary from country to country. Here are some commonly referenced standards for Cast Iron Round Bars in different countries:

1. United States:

- ASTM A48/A48M - Standard Specification for Gray Iron Castings

- ASTM A536 - Standard Specification for Ductile Iron Castings

- ASTM A278/A278M - Standard Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650°F (350°C)

- ASTM A319 - Standard Specification for Gray Iron Castings for Elevated Temperatures for Non-Pressure-Containing Parts

2. United Kingdom:

- BS EN 1561 - Founding - Grey Cast Irons

- BS EN 1563 - Founding - Spheroidal Graphite Cast Irons

- BS EN 13835 - Founding - Austempered Ductile Cast Irons

3. Germany:

- DIN 1691 - GJL (Gray Cast Iron) and GJS (Spheroidal Graphite Cast Iron)

- DIN EN 1561 - Founding - Grey Cast Irons

- DIN EN 1563 - Founding - Spheroidal Graphite Cast Irons

4. Japan:

- JIS G5502 - Gray Iron Castings

- JIS G5503 - Spheroidal Graphite Iron Castings

- JIS G5505 - High-Chromium Cast Iron

5. China:

- GB/T 9439 - Gray Iron Castings

- GB/T 1348 - Spheroidal Graphite Iron Castings

- GB/T 8263 - Austempered Ductile Iron Castings

6. France:

- NF EN 1561 - Founding - Grey Cast Irons

- NF EN 1563 - Founding - Spheroidal Graphite Cast Irons

- NF EN 1564 - Founding - Austempered Ductile Cast Irons

7. India:

- IS 210 - Grey Iron Castings

- IS 1865 - Spheroidal Graphite Iron Castings

- IS 1866 - Austempered Ductile Iron Castings

8. Australia:

- AS 1830 - Grey Iron Castings

- AS 1831 - Spheroidal Graphite Iron Castings

- AS 1832 - Austempered Ductile Iron Castings

9. Canada:

- CSA G30.18 - Grey Iron Castings

- CSA G30.19 - Ductile Iron Castings

- CSA G30.21 - Austempered Ductile Iron Castings

10. Russia:

- GOST 1412 - Cast Iron with Lamellar Graphite (Grey Cast Iron)

- GOST 7293 - Cast Iron with Spheroidal Graphite

- GOST 32192 - Cast Iron with Tempered Graphite

11. Italy:

- UNI EN 1561 - Founding - Grey Cast Irons

- UNI EN 1563 - Founding - Spheroidal Graphite Cast Irons

- UNI EN 16124 - Founding - Austempered Ductile Cast Irons

12. Brazil:

- ABNT NBR 6590 - Gray Iron Castings

- ABNT NBR 6916 - Spheroidal Graphite Iron Castings

- ABNT NBR 16121 - Austempered Ductile Iron Castings

13. Sweden:

- SS-EN 1561 - Founding - Grey Cast Irons

- SS-EN 1563 - Founding - Spheroidal Graphite Cast Irons

- SS-EN 1624 - Founding - Austempered Ductile Cast Irons

14. South Africa:

- SANS 1034 - Grey Iron Castings

- SANS 936 - Spheroidal Graphite Iron Castings

- SANS 16121 - Austempered Ductile Iron Castings

15. South Korea:

- KS D 4302 - Gray Iron Castings

- KS D 4303 - Spheroidal Graphite Iron Castings

- KS D 4306 - Austempered Ductile Iron Castings

16. Spain:

- UNE EN 1561 - Founding - Grey Cast Irons

- UNE EN 1563 - Founding - Spheroidal Graphite Cast Irons

- UNE EN 16124 - Founding - Austempered Ductile Cast Irons

17. Poland:

- PN-EN 1561 - Founding - Grey Cast Irons

- PN-EN 1563 - Founding - Spheroidal Graphite Cast Irons

- PN-EN 16124 - Founding - Austempered Ductile Cast Irons

18. Netherlands:

- NEN-EN 1561 - Founding - Grey Cast Irons

- NEN-EN 1563 - Founding - Spheroidal Graphite Cast Irons

- NEN-EN 16124 - Founding - Austempered Ductile Cast Irons

19. Mexico:

- NMX-B-121 - Gray Iron Castings

- NMX-B-143 - Spheroidal Graphite Iron Castings

- NMX-B-169 - Austempered Ductile Iron Castings

20. Saudi Arabia:

- SASO 1696 - Foundry Irons - Gray Iron Castings

- SASO 1697 - Foundry Irons - Spheroidal Graphite Cast Irons

- SASO 1698 - Foundry Irons - Austempered Ductile Cast Irons

21. Belgium:

- NBN EN 1561 - Founding - Grey Cast Irons

- NBN EN 1563 - Founding - Spheroidal Graphite Cast Irons

- NBN EN 16124 - Founding - Austempered Ductile Cast Irons

22. Switzerland:

- SN EN 1561 - Founding - Grey Cast Irons

- SN EN 1563 - Founding - Spheroidal Graphite Cast Irons

- SN EN 16124 - Founding - Austempered Ductile Cast Irons

23. Argentina:

- IRAM 1206 - Grey Iron Castings

- IRAM 1210 - Spheroidal Graphite Iron Castings

- IRAM 1211 - Austempered Ductile Iron Castings

24. Turkey:

- TS EN 1561 - Founding - Grey Cast Irons

- TS EN 1563 - Founding - Spheroidal Graphite Cast Irons

- TS EN 16124 - Founding - Austempered Ductile Cast Irons

25. Singapore:

- SS EN 1561 - Founding - Grey Cast Irons

- SS EN 1563 - Founding - Spheroidal Graphite Cast Irons

- SS EN 16124 - Founding - Austempered Ductile Cast Irons

26. Norway:

- NS-EN 1561 - Founding - Grey Cast Irons

- NS-EN 1563 - Founding - Spheroidal Graphite Cast Irons

- NS-EN 16124 - Founding - Austempered Ductile Cast Irons

27. Denmark:

- DS/EN 1561 - Founding - Grey Cast Irons

- DS/EN 1563 - Founding - Spheroidal Graphite Cast Irons

- DS/EN 16124 - Founding - Austempered Ductile Cast Irons

28. Finland:

- SFS-EN 1561 - Founding - Grey Cast Irons

- SFS-EN 1563 - Founding - Spheroidal Graphite Cast Irons

- SFS-EN 16124 - Founding - Austempered Ductile Cast Irons

29. Thailand:

- TIS 567 - Gray Iron Castings

- TIS 588 - Spheroidal Graphite Iron Castings

- TIS 589 - Austempered Ductile Iron Castings

30. Malaysia:

- MS ISO 185 - Gray Iron Castings

- MS ISO 1083 - Spheroidal Graphite Iron Castings

- MS ISO 1780 - Austempered Ductile Iron Castings

31. United Arab Emirates:

- UAE.S GSO ISO 185 - Grey Iron Castings

- UAE.S GSO ISO 1083 - Spheroidal Graphite Iron Castings

- UAE.S GSO ISO 1780 - Austempered Ductile Iron Castings

32. Austria:

- ÖNORM EN 1561 - Founding - Grey Cast Irons

- ÖNORM EN 1563 - Founding - Spheroidal Graphite Cast Irons

- ÖNORM EN 16124 - Founding - Austempered Ductile Cast Irons

33. South Africa:

- SANS 1034 - Grey Iron Castings

- SANS 936 - Spheroidal Graphite Iron Castings

- SANS 16121 - Austempered Ductile Iron Castings

34. Czech Republic:

- CSN EN 1561 - Founding - Grey Cast Irons

- CSN EN 1563 - Founding - Spheroidal Graphite Cast Irons

- CSN EN 16124 - Founding - Austempered Ductile Cast Irons

These standards and technical requirements provide guidelines for the production, testing, and quality control of cast iron round bars in their respective countries. They cover various aspects such as material composition, mechanical properties, heat treatment, inspection methods, and dimensional tolerances.

Please note that this is not an exhaustive list, and there may be additional standards or variations within each country. It is always advisable to refer to the latest applicable standards and consult with local authorities or industry experts for specific technical requirements and standards for cast iron round bars in different countries.