This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging and marking of reduced iron powder for powder metallurgy. This standard applies to iron powder produced by reduction method for powder metallurgy materials and products.
GB/T 4136-1994 history
1994GB/T 4136-1994 Reduced iron powders for powder metallurgy
GB/T 4136-1994 Reduced iron powders for powder metallurgy was changed to YB/T 5308-2006 Reduced iron powders for powder metallurgy.