1. Carbon steel forgings used as pressure vessel components (ASTM A266/A266M-90)
It is suitable for 4 grades of carbon steel forgings for boilers, pressure vessels and related equipment. The demander can check the Brinell hardness at any position on the forging, and the hardness value should be within the following range:
2. Alloy Forged Steel Rolls for Cold and Hot Rolling (ASTM A427-87)
Homogeneous hardened alloy forged steel rolls for cold and hot rolling of ferrous or non-ferrous flat rolled products. Hardness requirements.
The manufacturer shall supply the rolls within a mutually agreed hardness range for both the supply and demand.
The hardness test should check the hardness of each roll, and the hardness value should be within the range specified in the contract. It can be tested using a Shore hardness tester, a Rockwell hardness tester or a Vickers hardness tester. The hardness test steps, test quantities and parts can be agreed upon by both the supply and demand. To ensure the uniformity of the longitudinal and transverse directions of the rolls, a sufficient number of hardness tests should be carried out for each roll. The manufacturer should provide a hardness test report, and the steel grade, roll, model and hardness tester model should be written into the report.
3. Carbon steel and alloy steel forgings for general industrial use (ASTM A668-90)
It is suitable for non-treated and heat-treated carbon steel and alloy steel forgings for general industrial use.
Tensile test: The forging parts should meet the tensile properties shown in the table below.
Hardness test: Brinell hardness test should be carried out after final heat treatment (except for Class A forgings) and after rough machining; Each forging weighing 7,000 pounds (3,180 kg) or less should be tested for Brinell hardness.
The average of the hardness readings on each forging should be within the range specified in the table below. The allowable deviation of hardness of any forged piece weighing more than 250 lbs (113 kg) shall not exceed 30HB for Class A to E, 40HB for Class F to J, and 50HB for Class K to N.
