Armour Alloys is a leading Stainless steel sheet and coil distributor. Stainless steel has many different end uses such as medical equipment, kitchen equipment, machining, and metal stamping. Our coil inventory includes master coil as well as slit coil. The charts below show the chemical composition of the different stainless steel grades, along with other useful information. Our sales staff is here to help you make the right material choices for your specific projects. Head over to our Contact Us page to get a hold of one of our experienced staff members.


stainless slit coil

201

Typical Analysis: % Maximum unless shown as a range.
C: .15
Mn: 505/705
P: .060
S: .030
Si: 1.00
Cr: 16.0/18.0
Ni: 5.50
N2: .25

Mechanical Properties Typical
Tensile Strength psi: 110,000
Yield Strength psi: 50,000
Elongation on 2″: 55%
Rockwell B Hardness: 85

Applications
Siding/Roofing for Rail Cars, Auto Wheel Covers, Hose Clamps.

Corrosion Resistance
Resistant to a wide variety of mild corrosive media, but not as corrosion resistant as the more highly alloyed.

Heat Resistance
Oxidation resistance, comparable to Type 301 up to about 1550°, but scales more rapidly above this temperature.

Heat Treatment
Annealing – Heat to 1850°F – 2000°F, and cool rapidly. This grade is used in both the fully annealed and cold rolled conditions.

301

301 Stainless Steel

Description:

Type 301 Stainless Steel is an austenitic chromium-nickel stainless steel that provides high strength and good ductility when cold worked. The chromium and nickel contents are lowered to increase the cold work-hardening rate. This generates higher tensile strengths when cold rolled with a lower loss of ductility than with Types 302 and 304. The grade is essentially non-magnetic when annealed. When cold worked, it becomes slightly more magnetic than other standard austenitic stainless steels. NKS is your stainless steel distributor for 301 Stainless Steel.

Product Forms:

Sheet, Strip

Specifications:

ASTM A240, A666 Typical

Applications:

Typical uses include springs, structural parts, trailer bodies, diaphragms, utensils, architectural and automotive trim, hose clamps, wheel covers, roofing products, kitchen utensils

Chemical Composition:

Element Type
Carbon 0.15 max.
Manganese 2.00 max.
Sulfur 0.030 max.
Phosphorus 0.045 max.
Silicon 0.75 max.
Chromium 16.00 – 18.00
Nickel 6.00 – 8.00
Nitrogen 0.10 max.

Mechanical Properties:

Type Yield Strength 0.2% offset (KSI) Tensile Strength (KSI) % Elongation (2″ Gauge length) Hardness Rockwell
301 Ann (typical) 40 110 min. 60 HRB 85
301 ¼ Hard 75 min. 125 min. 25 min. HRC 25 – 32(typical)
301 ½ Hard 110 min. 150 min. 18 min. HRC 32 – 37(typical)
301 ¾ Hard 135 min. 175 min. 12 min. HRC 37 – 41(typical)
301 Full Hard 145 min. 185 min. 8 min HRC 41 – 46(typical)

Physical Properties:

Density (lb./ in^2) @ RT   0.285
Modulus of Elasticity in Tension (psi x 10^6)   28.0
Specific Heat (BTU/o F/lb.) 32 to 212 oF 0.12
Thermal Conductivity (BTU/hr/ft^2/ft) 212oF 9.4
  932oF 12.4
Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F) 32 to 212oF 9.4
  32 to 600oF 9.9
  32 to 1,000oF 10.2
  32 to 1,200oF 10.4
Electrical Resistivity (micro ohms – cm) at 70oF 27.4
Melting Point Range (oF)   2550 – 2590
Oxidation Resistance – Continuous Service(oF)   1600
Oxidation Resistance – Intermittent Service(oF)   1450

Processing:

Type 301 is non-hardenable by heat treatment. Annealing: Heat to 1900 – 2050°F (1038 – 1121°C), then water quench. Stress Relief Annealing: Heat to 500 – 900°F (260 – 482°C), then air cool.

Forming:

Type 301 can be formed and drawn. Due to its high work-hardening rate, intermediate annealing may be necessary for severe drawing and forming operations.

Welding:

301 has similar weldability to the most common 18-8 stainless alloys. The major difference is the high C content of this alloy, which causes the weld heat affected-zones to be susceptible to accelerated corrosion in certain environments. When filler is needed, AWS E/ER 308 is most often specified.

Corrosion:

Type 301 exhibits corrosion resistance comparable to Types 302 and 304 in the mild service conditions. Resistance to atmospheric corrosion, food, juices and road de-icing salt is excellent. The best corrosion resistance is obtained in the annealed condition.

302, 304 and 304L

Typical Analysis: % Maximum unless shown as a range.

C

Mn

P

S

Si

Cr

Ni

302

.15

2.00

.045

.030

1.00

17.00/19.00

8.00/10.00

304

.08

2.00

.040

.030

.65

18.00/20.00

8.00/10.50

Note: 304L has .03% max. carbon in all forms produced.

Mechanical Properties
Typical

Tensile Strength psi

Yield Strength psi

Elongation on 2″

Rockwell B Hardness

 84,000

40,000

50%

84

Specifications

The following specifications are generally applicable:

  • Sheet and Plate: MIL-S-5059, AMS-5513, ASTM A 167, ASTM A 240, ASME SA-240

  • Bar: MILS-S-18170,QQ-S-763, AMS-5639, ASTM A 276, ASTM A 479, ASME SA-479

Applications

Washing machine tubs, sinks, strainers, food processing equipment, beer barrels, bulk milk coolers, wine storage tanks, store fronts, elevator doors and cabs, laboratory equipment and chemical containers, fume hoods, fire extinguisher parts, heat exchangers, are typical uses.

Corrosion Resistance

Types 302 and 304 show good resistance to corrosion. They are highly resistant to strong oxidizing acids, such as nitric acid. Intergranular corrosion may occur when material is heated within or cooled through the range of 425°-815°C (800D-1500°F).

Heat Resistance

Good oxidation resistance in intermittent service to 1600° and in continuous service to 1650°F. Continuous use in the 800 – 1575°F range not recommended but often performs well in temperatures fluctuating above and below this range. Type 304L is more resistant to carbide precipitation and can be used in the above temperature range.

Heat Treatment

Annealing – Heat to 1850CF – 2050CF, and cool rapidly. Use the low side of the range for intermediate annealing. This grade cannot be hardened by thermal treatment.

Machinability

Types 302 and 304 have a machinability rating of approximately 45%, with B 1212 rated as 100%. Surface cutting speed on automatic screw machines is approximately 75 feet per minute.

Weldability

Easily welded by all the commercial processes except forge or hammer welding.

309, 309S

General Characteristics

Type 309 combines high resistance to oxidation with high tensile and creep strength at elevated temperature. This alloy resists oxidation up to 1065°C (1950°f=) for continuous service & 1010°C (1850″F) in intermittent service. Alloy performance is best at constant temperatures.

Typical Analysis: % Maximum unless shown as a range
C:.20
Mn: 2.00
P: .045
S: .030
Si: 1.00
Cr: 22.00/24.00
Ni:12.00/15.00

Note: 309S has .08% carbon in all forms produced.

Mechanical Properties
Tensile Strength psi: 90,000
Yield Strength psi: 45,000
Elongation on 2″: 45%
Rockwell B Hardness: 85
Sheet: 95,000
Bar:40,000

Specifications
The following specifications are generally applicable:
Sheet and Plate: ASTM A 167
Bar: 309S only – ASTM A 276

Applications
Exhaust manifold, butterfly valves, annealing boxes, furnace parts, air draw furnace shafts, baffles, cement kiln chain, welding rods.

Corrosion Resistance
Type 309 has a high chromium content which provides excellent resistance to corrosion. Corrosion data pertaining to Types 302 / 304 will apply to Type 309. If strength at high temperature is the prime requisite, Type 309 with over ,08% carbon should be used. When intergranular carbide precipitation is a problem. Type 309S with .08% maximum carbon should be selected. Types 309 and 309S are the best ausfenitic alloys fo resist corrosive attack by hot sulphur compounds in oxidizing gases.

Voidability
Easily welded by all the commercial processes except for forge or hammer welding.

310

General Characteristics
With high chromium and nickel content, Type 310 has the heat resisting properties of the more commonly used stainless steels. It has high creep strength and mechanical properties and does not become brittle at elevated temperatures.

Typical Analysis:% Maximum unless shown as a range
C: .25
Mn: 2.00
P: .045
S: .030
Si: 1.5
Cr: 24.00/26.00
Ni:19.00/22.00

Mechanical Properties
Tensile Strength psi: 95,000
Yield Strength psi: 45,000
Elongation on 2″: 45%
Rockwell B Hardness: 85

Specifications
The following specifications are generally applicable:
Sheets : ASTM A 167, ASTM A 240, ASTM A 580

Applications
Furnace parts, carburizing boxes, heat exchangers, oil burner parts, heat treatment baskets and jigs, welding filler wire and electrodes, are typical uses.

Corrosion Resistance
Excellent resistance at normal temperatures and when in high temperature service, exhibits good resistance to oxidation and carburizing atmospheres. Resists fuming nitric acid at room temperature and fused nitrates up to 425°C (800° F).

Heat Resistance
Good oxidation resistance in intermittent service tol 900° and in continuous service to 2100°F. Good resistance to thermal fatigue and cyclic heating. Widely used where sulphur dioxide gas is encountered at elevated temperatures. Continuous use in the 800 – T575°F range not recommended but often performs well in temperatures fluctuating above and below this range.

Heat Treatment
Annealing – Heat to 1900°F – 2100°F, and cool rapidly for maximum corrosion resistance. This treatment is also recommended to restore ductility after each 1000 hours of service at 1200°F – 1900°F

Weldability
Good characteristics suited to all standard welding methods.

316

General Characteristics
Type 316 is modified by the addition of molybdenum, which greatly increases its corrosion resistance as well as its mechanical properties at elevated temperatures. Plates are available not only in the regular Type 316 analysis, but also in a low carbon analysis known as Type 316L which precludes any harmful precipitation in the 425°-815nC (800IMSOO°F)range.

Typical Analysis: % Maximum unless shown as a range
C: .08
Mn: 2.00
P: .045
S: .030
Si: .75
Cr: 16.00/14.00
Ni: 10.00/14.00
Mo: 2.00/3.00

Note: 316L has .03% max. carbon in alt forms produced.

Mechanical Properties
Tensile Strength psi: 84,000 Yield Strength psi: 42,000 Elongation on 2″: 55% Min. Rockwell B Hardness: 80

Specifications
The following specifications are generally applicable:
Sheet and Plate: MIUS-5059, ASTM A 167, ASTM A 240, ASME SA-240
Bar: MILS-S-7720, AMS-5648, QQ-S-763, ASTM A 276, ASME SA-479

Applications
Pulp and paper equipment, heat exchangers, dyeing equipment, photographic developing equipment, propeller shafts, fittings, exterior architectural components in marine coastal areas, are typical uses.

Corrosion Resistance
Highly resistant to the complex sulphur compounds used in pulp and paper processing. Also resists attack by marine and corrosive industrial atmospheres.

Heat Resistance
Good oxidation resistance in intermittent service to 1600° and in continuous service to 1700°F.  Continuous use in the 800 – 1575°F range not recommended but often performs well in temperatures fluctuating above and below this range. Type 316L is more resistant to carbide precipitation and can be used in the above temperature range.

Heat Treatment
Annealing – Heat to 1850°F – 2050°F, and cool rapidly for maximum corrosion resistance. 316 grades cannot be hardened by thermal treatment.
Machinability
Types 316 has a machinability rating of approximately 36%, with B 1212 rated as 100%. Surface cutting speed on automatic screw machines is approximately 60 feet per minute.

Weldability
Easily welded by all the commercial processes except for forge or hammer welding.

409

General Characteristics
Typo 409 is extensively used in automotive exhaust systems. It is also used for structural applications where good appearance is not a prime requirement.

Typical Analysis: % Maximum unless shown as a range
C: 0.8 Mn: 1.0 P: .040 S: .030 Si: 1.0 Cr: 10.5/11.75 Ti: 6 x C Min. 0.75 Max.

Mechanical Properties
Tensile Strength psi: 65,000
Yield Strength psi: 35,000
Elongation on 2″: 25%
Rockwell B Hardness: 75

Corrosion Resistance
Resists atmospheric and automotive exhaust gas corrosion. A light surface rust can form in most atmospheres. This rust retards progressive corrosion but makes the surface undesirable for decorative applications.

Heat Resistance
Good resistance to scaling in intermittent service to 1425°F and in continuous service to 1400°F.

Heat Treatment
Annealing – Heat to 1400°F – 1500°F, and air cool. 409 grades cannot be hardened by thermal treatment. Voidability Roadlly welded but a preheat of 150° – 260°C (300° – 500°F) is recommended.

410

General Characteristics
Type 410 is the basic chromium grade combining excellent corrosion resistance with the ability to develop hardness and mechanical properties by heat treating.

Typical Analysis: %Maximum unless shown as a range
C: .15
Mn: 1.00
P: .040
S: .030
Si: 1.00
Cr: 11.50/13.50

Mechanical Properties
Tensile Strength psi: 70,000
Yield Strength psi: 45,000
Elongation on 2″: 25%
Rockwell B Hardness: 80

Specifications
The following specifications are generally applicable:
Sheet and Plate: AMS-5504, QQ-S-766, ASTMA176
Bar: AMS-5613, QQ-S-763,MIL-S-861,ASTMA 182,ASTMA276

Applications
Bolts, nuts, screws, bushings, pump parts and shafts, steam and gas turbine parts, valves, petroleum fractionating towers and mine ladder rungs, are typical uses.

Corrosion Resistance
Resists dry atmospheres, fresh water, mild alkalies and acids, steam and hot gases. Must be hardened for maximum heat and corrosion resistance. Less corrosion resistant than 300 Series grades and ferritic 400 Series alloys such as Type 430.

Heat Resistance
Good resistance to scaling in intermittent service to 1500°F and in continuous service to 1300°F.

Heat Treatment
Annealing – Heat to 1400°F – 1500°F, and air cool. 410 grades cannot be hardened by thermal treatment.

Machinability
Type 410 has a machinability rating of approximately 54%, with B 1212 rated 100%. Surface cutting speed on automatic screw machines is approximately 90 feet per minute.

Weldability
May be welded by all the commercial processes except forge or hammer welding.

430

General Characteristics
Type 430 is a straight chromium, non-hardenable grade combining good corrosion resistance and formability with useful mechanical properties. Its ability to resist nitric acid attack permits its use in specific chemical applications but automotive trim represents its largest field of applications.

Typical Analysis: % Maximum unless shown as a range
C: .12
Mn: 1.00
P: .040
S: .030
Si: 1.00
Cr: 16.00/18.00

Mechanical Properties
The following values are average and may be considered as representative of this grade in the annealed condition:
Tensile Strength psi: 75,000
Yield Strength psi: 50,000
Elongation on 2″: 25%
Rockwell B Hardness: 85

Specifications
Specification ASTM A 276 is generally applicable.

Applications
Automotive trim, lashing wire, element supports, stove trim rings and fasteners are typical uses.

Corrosion Resistance
Good resistance to wide variety of corrosive media including nitric acid and some organic acids. It attains its maximum corrosion resistance in the highly polished or buffed condition.

Heat Resistance
Good resistance to scaling in intermittent service tol 600°F and in continuous service to 1500°F. 430 grades may become brittle at room temperature after prolonged heating in the 750°F – 1100°F range. This can be eliminated by annealing.

Heat Treatment
Annealing – Heat to 1500°F – 1550°F, hold for 30 minutes per inch of thickness, slow furnace cool to 1100°F then quickly air cool. 430 grades cannot be hardened by thermal treatment.

Machinability
Type 430 has a machinability rating of approximately 54%, with B 1212 rated 100%. Surface cutting speed on automatic screw machines is approximately 90 feet per minute.

Weldability
Fair welding characteristics, with welds tending to be brittle.

Specs

MATERIAL SPECIFICATIONS

ASTM A167 – specification for stainless and heat resisting chromium nickel steel plate, sheet and strip.

ASTMA240 – specification for stainless and heat resisting chromium nickel steel plate, sheet and strip for pressure vessels.

ASTM A262 – Practices for detecting susceptibility to intergranular attack in austenitic stainless steels.

ASTMA370 – Methods and definitions for mechanical testing of steel products.

ASTMA480 A480M – Specification for general requirements for flat rolled stainless and heat resisting steel plate, sheet and strip. ASTM A751 – Methods, practices and definitions for chemical analysis of steel products. ASTME140 – Hardness equivalents. QQ-S766-Federal specification for steel plate, sheet and strip corrosion resisting. MIL-S-4043 – Specification for steel: corrosion resisting for plate, sheet and strip (grain size for plate shall be aim 5 max.).

MIL-S-5059 – Amendment 4 (except product analysis), military specification for steel corrosion resistance (18-8) plate, sheet and strip.

AMS-5511E – Specification for steel plate, sheet and strip corrosion resistance.

AMS-5513D –  Specification for steel plate, sheet and strip corrosion resistance.

AMS-5524 – Specification for steel plate and sheet corrosion resistance.

ASME-SA240 – Specification for heat resisting chromium and chromium nickel steel plate, sheet and strip for pressure vessels.

ASTM-A666 – Specification for oustenitic stainless steel strip, plate and flat barfor structural applications.

QQ-S-766 – Specification for steel plate, sheet and strip corrosion resistance.

DESCRIPTIONS OF PRODUCTS SPECIFIC TO THIS STANDARD
Plate and sheet as used in this specification are described as follows :
Plate: material 3/16 inch in thickness and over.
Sheet: material under 3/16 inch and 24 inch and over in width.
Strip: material under 3/16 inch and less than 24 inch wide.

CHEMISTRY AND MECHANICAL PROPERTIES
The product purchased to this specification shall meet the chemistry and mechanical properties of all the specifications referenced and as written on the purchase order.

DIMENSIONS AND PERMISSIBLE VARIATIONS
Unless otherwise specified in the purchase order, material shall conform to the permissible tolerances shown in Specification ASTM A480 / A480M. Should A480 / A480M not cover the product being produced, agreement shall be mutually resolved prior to production, by the purchaser and Universal Stainless & Alloys Inc.

 

Commodity Values of Nickel