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Om Metalab Services Private Limited

Kondhwa BK, Pune, Maharashtra

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Stainless Steel

Our product range includes a wide range of Stainless Steel 15-5 PH, Stainless Steel 17-4 PH, Stainless Steel PH13-8 Mo, Stainless Steel 17-7 PH, Stainless Steel 422 and Stainless Steel 304.

Stainless Steel 15-5 PH
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Stainless Steel 15-5 PH

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Stainless Steel 15-5 is a precipitation hardening martensitic stainless steel. It is used in applications requiring better corrosion resistance and transverse properties compared to other similar martensitic grades. Strength and toughness desired can be altered by temperate range in the heat treatment process.
Standards
  • UNS S15500
  • AMS 5659
  • ASTM A564
Composition(%)
  • Carbon 0.070 Max
  • Chromium 14.0-15.50
  • Columbian + Tantalum 0.15-0.45
  • Copper 2.50-4.50
  • Manganese 1.00 Max
  • Nickel 3.50-5.50
  • Phosphorus 0.040 Max
  • Silicon 1.00 Max
  • Sulfur 0.30 Max

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Stainless Steel 17-4 PH
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Stainless Steel 17-4 PH

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17-4 ph Stainless Steel is a precipitation hardening martensitic stainless steel. Typical 17-4 ph usage is seen in applications requiring high strength and a modest level of corrosion resistance. Strength and toughness desired can be manipulated by temperate range in the heat treatment process.
Below you will find typical applications of 17-4 ph stainless steel as well as the metals composition and mechanical properties. Learn more about or value added services that we offer to help you expedite the current job you have at hand.

With a high resistance to corrosion, 17-4 PH Stainless Steel is one of the many stainless steel options Altemp Alloys offers. 17-4 PH is an economical alternative to other stainless and strong carbon steels.

Standards

  • UNS S17400
  • AMS 5643
  • ASTM A564
  • ASTM A693 Grade 630

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Stainless Steel PH13-8 Mo
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PH 13-8 Mo* stainless is a martensitic precipitation/age-hardening stainless steel capable of high strength and hardness along with good levels of resistance to both general corrosion and stress-corrosion cracking. In addition, the alloy exhibits good ductility and toughness in large sections in both the longitudinal and transverse directions. The excellent properties of PH 13-8 Mo stainless are obtained through close control of chemical composition and microstructure plus specialized melting which reduces impurities and minimizes segregation. Compared to other ferrous-based materials, this alloy offers a high level of useful mechanical properties under severe environmental conditions.
13-8 Mo stainless has good fabrication characteristics and can be age-hardened by a single low temperature treatment. Cold work prior to aging increases the aging, especially for lower aging tempratures.

13-8 Mo stainless has been used for valve parts, fittings, cold-headed and machined fasteners, shafts, landing gear parts, pins, lockwashers, aircraft components, nuclear reactor components and petrochemical applications requiring resistance to stress-corrosion cracking. Generally, this alloy should be considered where high strength, toughness, corrosion resistance, and resistance to stress-corrosion cracking are required in a steel showing minimal directionality in properties. *PH 13-8 Mo stainless is a registered trademark of Armco Inc.

Standards

  • UNS S17400
  • AMS 5643
  • ASTM A564
  • ASTM A693 Grade 630

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Stainless Steel 17-7 PH
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Stainless Steel 17-7 PH

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17-7 PH stainless steel is a stable, chromium-nickel-aluminum steel that's frequently used in the aerospace industry and when meticulous, elaborate parts are needed.

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Stainless Steel 422
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Stainless Steel 422

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General Characteristics of Stainless 422

With better strength at higher temperatures, Stainless 422 is an appealing alternative to Stainless 403. It offers ductility and strength from room temperature to 1200°F (649°C) and resists scaling and oxidation to 1400°F (760°C).

Machinability of Stainless 422 Comparable to 18-8 but easier to machine Help avoid galling with sharply ground tools Maintain consistent speed and feed Turning tools: 8-14° side rake Drilling: 140° point Threading: grind tools with 10-15° back rake Cobalt high-speed tools: turn at 90-120 sfpm, drill at 40-75 sfpm, mill at 70-120 sfpm, ream at 20-60 sfpm, roughing and finishing at 200-400 sfpm Workability of Stainless 422 Initial forging and rolling at 2100° to 2150°F (1149° to 1177°C) 1700°F (927°C) minimum to hot work

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Stainless Steel 304
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Stainless Steel 304

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Dual certified 304/304H is used as a material of construction up to 1500°F. Slight scaling begins at about 1200°F. This is the 0.04% minimum carbon version of type 304 stainless. It has general corrosion resistance similar to the low carbon 304/304L. However, it is subject to carbide precipitation in the heat affected zone (HAZ) of welds. Weldments may be sensitive to HAZ intergranular corrosion in oxidizing acid environments, and to polythionic acid stress corrosion cracking. The carbide precipitation is not harmful to high temperature mechanical properties.
304/304H is welded using the 22Cr 11Ni filler wire (ER308), or covered electrodes (E308). Post-weld heat treatment is not necessary for most high temperature service.

Machinability of Stainless 422 Comparable to 18-8 but easier to machine Help avoid galling with sharply ground tools Maintain consistent speed and feed Turning tools: 8-14° side rake Drilling: 140° point Threading: grind tools with 10-15° back rake Cobalt high-speed tools: turn at 90-120 sfpm, drill at 40-75 sfpm, mill at 70-120 sfpm, ream at 20-60 sfpm, roughing and finishing at 200-400 sfpm Workability of Stainless 422 Initial forging and rolling at 2100° to 2150°F (1149° to 1177°C) 1700°F (927°C) minimum to hot work

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Stainless Steel 310
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Stainless Steel 310

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Stainless steel 310/310S is an austenitic heat resistant alloy with excellent resistance to oxidation under mildly cyclic conditions through 2000° F. Its high chromium and nickel contents provide comparable corrosion resistance, superior resistance to oxidation and the retention of a larger fraction of room temperature strength than the common austenitic alloys like Type 304. Stainless 310 is often used at cryogenic temperatures, with excellent toughness to -450°F, and low magnetic permeability.

As you can see below, Grade 310S is a low carbon version of grade 310. 310S is less prone to embrittlement and sensitization in service.

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Stainless Steel 316 & 316L
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316/316L is the most commonly used austenitic stainless steel in the chemical process industry. The addition of molybdenum increases general corrosion resistance, improves chloride pitting resistance and strengthens the alloy in high temperature service. Through the controlled addition of nitrogen it is common for 316/316L to meet the mechanical properties of 316 straight grade, while maintaining a low carbon content.

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Stainless Steel 321
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Stainless Steel 321

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Stainless 321 is a heat resistant, titanium stabilized, austenitic alloy that's commonly used for service in the 1000°-1600°F temperature range. 321 stainless is primarily used in applications that involve continuous and intermittent service temperatures within the carbide precipitation range of 800°-1500°F. Type 321 is similar to type 304 stainless but with a titanium addition of at least five times the carbon content. This titanium addition reduces or prevents carbide precipitation during welding and in the 800°-1500°F service conditions. In order to provide optimum resistance to intergranular corrosion and to polythionic acid stress corrosion cracking in service temperatures at 1500°-1650°F an air cool may be used.

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Stainless Steel 347
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Stainless Steel 347

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Type 347 stainless steel has slightly improved corrosion resistance over type 321 stainless steel in strongly oxidizing environments. Type 347 is stabilized with columbium, it is preferable for aqueous and low temperature environments due to its good resistance to intergranular attack. Both 347 and 321 offer good resistance to polythionic acid stress corrosion cracking, encountered in oil refineries. The high temperature oxidation resistance of 347 is similar to that of 304 stainless steel. Useful to 1500°F.
Often in many product forms, the grain size and carbon content can meet both the 347S and 347H requirements. Appropriate weld fillers are AWS ER347 bare wire and E347 covered electrodes.

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Stainless Steel 410
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Stainless Steel 410

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410 stainless is a corrosion and heat resistant 12% chromium steel. It is the most widely used of the hardenable stainless steels. Heat treated 410 has mechanical properties comparable to the engineering alloy steel AISI 4130, coupled with the additional benefit of good corrosion resistance. 410 is highly resistant to atmospheric corrosion. Maximum corrosion resistance is obtained by hardening and polishing.

Because 410 is an air hardening steel, it must be given a high preheat, at least 350-400°F before welding, and immediately given a full anneal before the weldment cools. Otherwise the metal will harden, and cracking is likely. Matching composition filler metals are available, AWS E410 covered electrodes and ER410 bare filler wire. Alloy 82 (AWS ERNiCr-3) filler wire has also been used. This nickel alloy is comparatively low strength, and therefore accommodates some of the strain which may otherwise contribute to cracking in the 410 weldment.

Heat uniformly to 1200-1400°F, remove from furnace and air cool. This should result in Brinell hardness about 187. For maximum softness, heat to 1500-1650°F, furnace cool slowly to 1100°F, after which air cooling is permissible. Brinell hardness should be approximately 155. Heat to 1750-1850°F, soak at heat, and quench in oil. Light sections will also harden by air cooling. 410 will harden to some degree when heated 1500°F and over unless slowly cooled to below the critical temperature. Soak at heat at least one hour, longer for large sections, and air cool. Tempering 410 in the range 750-1050°F results in decreased impact toughness and somewhat reduced corrosion resistance.

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Stainless Steel 420
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Stainless Steel 420

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Type 420 Stainless Steel provides both outstanding corrosion resistance and exceptional wear resistance. To obtain the best possible strength and wear resistance, oil quench alloy 420 at a temperature between 1800° F and 1950° F. Alloy 420 Stainless Steel is commonly used in dental and surgical instruments, cutlery, plastic molds, pump shafts, steel balls, and numerous hand tools.
Because of its air hardening properties, type 420 Stainless Steel is not often welded, although, it is possible. When welding with stainless steel type 420, preheat the steel to a temperature between 300° F and 400° F. After welding, temper the work piece at temperature for two hours. When hot working, it is recommended to gradually raise the temperature to 1400° F and then gradually raise the temperature to anywhere from 2000° F to 2200° F. While working, avoid letting the work temperature drop below 1600° F by frequently reheating the steel. To prevent cracking, furnace cool the work piece slowly after working. Any extreme cold forming will cause alloy 420 Stainless Steel to crack, but it can endure minor cold work.

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Stainless Steel 430
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Stainless Steel 430

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Extra Bright Annealed Soft Temper 430 Stainless Strip Steel is the most popular of all the straight chrome stainless steels. Its principal use is for decorative purposes. Because of its excellent heat and corrosion resistant properties, its ductility and because it costs less than the chrome-nickel grades, this Type 430 Stainless Steel Strip is used in countless applications. These uses are primarily for stainless and decorative purposes including household appliances, metal molding, metal trim, cabinet hardware, hinges, drawn and formed parts and stampings.
(17% straight chrome) Ferritic Stainless Steel Strip. This is the basic and most generally used straight chromium (Ferritic) Stainless Strip Steel. Because of its high chromium content, it is highly corrosion and heat resistant but somewhat less than Types 301, 302 and 304. It possesses good physical and mechanical characteristics but with ductility at about 75% of low carbon strip and inferior to that of the chrome-nickel grades. Like other straight chromium grades, Type 430 Annealed is subject to stretcher strains. Skin passing following annealing greatly reduces this possibility although this reduces ductility somewhat. Likewise a condition akin to stretcher strains may sometimes develop during deep drawing known as roping. Roping is characterized by the appearance of shallow ridges and valleys in the side walls and caused by excessive stretching. Type 430 is magnetic in all conditions, is not heat-treatable for hardening purposes and is weldable but its welds are not suitable in rigorous service. The tensile strength for SS 430 in the annealed condition is cataloged at 65,000 PSI minimum, its yield at 30,000 PSI minimum and elongation at 22%.

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Stainless Steel 440C & 440B
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440C Stainless steel is a type of modern steel and famous for its high corrosion resistant, wear resistance, strength and hardness qualities, among all the stainless alloys, capable of attaining (after heat treatment) the highest hardness (60 HRC). It has good resistance to the atmosphere, fresh water and mild acids. It has best resistance in the hardened, tempered and passivated condition. It allows creating a smooth polished surface and Razor sharp edges.
It is being used in cutting instruments, rolling element bearings, valve seats, high quality knife blades, surgical instruments, chisels, ball bearings and valve parts and most commonly used in the production of Cutting tools, including Haircutting Scissors, daggers and swords.

Grades 440A and 440B are identical except for slightly lower carbon contents (0.60 - 0.75% and 0.75 - 0.95% respectively), they attain lower hardness but have slightly higher corrosion resistances. Although all three versions of this grade are standard grades, in practice 440C is more available than the A or B variants.

Another alloy 440F (UNS S44020) also exists, with the same high carbon content as 440C.

440 Steel family, there is a new modern kind of steel, known as 440V steel. Basically, it is the advancement of 440C steel. This steel has same level of hardness like 440C, but it has more corrosion resistant ability and more machine-ability.

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Stainless Steel 317 & 317L
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