Project Description
TWZ-2 Non-magnetic Steel
Forged steel for non-magnetic drill collars with a yield strength of 110 KSI
Chemical Component
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Cu | N | B |
| TWZ-2 | ≤ 0.04 | ≤ 1.00 | 17.50- 23.50 | ≤ 0.040 | ≤ 0.010 | 16.00- 18.50 | 0.40- 0.80 | ≥ 0.50 | ≤ 0.60 | ≥ 0.48 | ≤ 0.0050 |
Mechanical property
| Diameter /mm | RP0.2 /MPa | Rm /MPa | A /% | AkV /J | HBW |
| ≤190 | ≥758 | ≥827 | ≥18 | ≥100 | ≥285 |
| >190-280 | ≥689 | ≥758 | ≥20 | ≥265 |
Magnetic properties
When the magnetic field strength is 1×105/4π A/m, the relative permeability μr is tested and determined as follows according to whether or not the user requires a magnetic gradient. (Special instructions must be given at the time of ordering; if no special instructions are given, it is deemed that there is no requirement for magnetic gradient). 1) No requirement for magnetic gradient: 2pcs/batch, each analyzing 1 magnetic permeability performance, the sampling part is 25.4mm from the surface (recorded as μr (25.4)), μr (25.4) ≤1.008. 2) Requirement for magnetic gradient (magnetic gradient ≤0.05μT): Applicable forging material specification range φ80-280mm.
We are committed to integrate steel resources in china and serve the global steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise before. In the aspect of resources and information, we have established cooperative relationship with nearly hundred enterprises, either state-owned or private owned in China.
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