Excellent MP35N R30035 Corrosion Resistant Alloys Ultrahigh Tensile Strength

Excellent corrosion resistance MP35N (R30035) tube, wire, bar, forging for food processing etc

1 PRODUCT

High strength and excellent corrosion resistance MP35N (UNS R30035) tube, wire rod, wire, bar, forging, strip etc.

2 EQUIVALENT DESIGNATION

UNS R30035, W.Nr.2.4999, AWS 110, CarTech® MP35N Alloy

3 PRODUCT FORM

Round bar

Forged stock

Strip

Wire rod

Wire

Tube

4 APPLICATION

Because of its unique combination of properties, MP35N alloy has been used in a wide variety of applications.

MP35N alloy has been used in fasteners, springs, nonmagnetic electrical components and instrument parts in medical, seawater, oil and gas well, and chemical and food processing environments.

5 OVERVIEW

MP35N alloy is a nonmagnetic, nickel-cobalt-chromium-molybdenum alloy possessing a unique combination of ultrahigh tensile strength (up to 300 ksi [2068 MPa]), good ductility and toughness, and excellent corrosion resistance. In addition, this alloy displays exceptional resistance to sulfidation, high temperature oxidation, and hydrogen embrittlement.
The unique properties of MP35N alloy are developed through work hardening, phase transformation and aging. If the alloy is used in the fully work hardened condition, service temperatures up to 750°F (399°C) are suggested.
MP35N alloy is normally produced by vacuum induction melting (VIM), followed vacuum arc remelting (VAR).

6 CHEMICAL COMPOSITION (wt%):

Table 1

7 PHYSICAL PROPERTY

Density: 8.43 g/cm3 (0.304 lb/in3)

Melting range: 1316-1444°C (2400 to 2630°F)

8 MECHANICAL PROPERTIES

Typical room and elevated temperature tensile properties

Aged 1050°F (565°C) / 4 hours / AC

9 CORROSION RESISTANCE

MP35N alloy possesses excellent resistance to sulfidation, high temperature oxidation, hydrogen embrittlement, saline solutions and most mineral acids.

This alloy features exceptional resistance to stress corrosion cracking at very high strength levels under severe environmental conditions that can crack most conventional alloys. It is also highly resistant to other forms of localized attack, such as pitting and crevice corrosion.

In seawater environments, this alloy is virtually immune to general, crevice and stress corrosion, regardless of strength level or process condition.

MP35N alloy is an extremely noble metal. This can result in galvanic corrosion when electrically coupled with more active metals such as carbon steel, Type 316 stainless, or K-Monel.

MP35N alloy is included in NACE MR0175 to a maximum hardness of Rockwell C35 (maximum hardness of Rockwell C48 in specific cold reduced plus aged conditions). This material requirement lists sulfide stress cracking resistant materials for exposure to sour environments, such as in gas and oil well service.

10 HEAT TREATMENT

Annealing

MP35N alloy should be annealed at 1900/2000°F (1038/1093°C) for one to four hours, followed by air cooling.

Aging

After work hardening, MP35N alloy can be aged in the temperature range of 800/1200°F (427/649°C) for increased strength. The alloy will respond to aging only if first work strengthened. No increase in strength will result from aging annealed material.

11 WORKING INSTRUCTION

Hot working

MP35N alloy should be forged from approximately 2150°F (1177°C). To prevent surface tearing, deformation should not be continued below approximately 1600°F (871°C). MP35N alloy forges and rolls similarly to Waspaloy alloy or Pyromet® alloy 718.

Cold working

The strength levels developed by MP35N alloy are primarily the result of mechanical working. Mechanical working can take the form of either cold or warm working. In warm working, temperatures should be kept below 800°F (427°C).

Work hardening can be accomplished by drawing, rolling, extruding, forging, swaging or a combination of these methods.

Both strength and hardness increase in a nearly linear manner with percent cold work. As expected, ductility decreases with increasing percent cold work; however, even with large amounts of deformation, excellent ductility is retained.

When determining the strength level developed, working operations which deform the metal similarly can be considered additive. Thus, all work strengthening need not be performed at the mill. Some working can be done when the part is formed into its final shape.

Machinability

MP35N alloy is difficult to machine in any heat treated condition. Machinability studies have shown that this alloy possesses machining characteristics superior to those of Waspaloy, a widely used standard for nickel-cobalt-chromium-base alloy machinability. Machining parameters for MP35N alloy are similar to those used for Waspaloy alloy.

12 STANDARD SPECIFICATION

SAE AMS 5758

SAE AMS 5844

SAE AMS 5845

ASTM F562

13 COMPETITIVE ADVANTAGE:

(1) More than 50 years experience of research and develop in high temperature alloy, corrosion resistance alloy, precision alloy, refractory alloy, rare metal and precious metal material and products.
(2) 6 state key laboratories and calibration center.
(3) Patented technologies.
(4) High performance

14 BUSINESS TERM