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Grades

SNAPP has access to a wide range of stainless steel pipe, fittings, and flanges to meet quick requirements as well as project support. Domestic (USA), Approved Import (AML), Generic Import and China material is available from stock.

Click on each alloy to see more detailed information.

304 / 304L

304/304L is a cost-efficient austenitic stainless steel which can be used in a wide range of applications.  Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S30400, UNS S30403.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of Measure304304L
Tensile Strengthksi75 min70 min
0.2% Yield Strengthksi30 min25 min
Elongation%40 min40 min
HardnessHV92 max92 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element 304304L
CrChromium18.0-20.018.0-20.0
NiNickel8.0-10.58.0-12.0
MnManganese2.000 max2.000 max
SiSilicon0.750 max0.750 max
PPhosphorus0.045 max0.045 max
CCarbon0.080 max0.030 max
SSulfur0.030 max0.030 max
NNitrogen0.100 max0.100 max

316 / 316L

316/316L is an austenitic stainless steel with greater corrosion resistance in comparison to 304/304L. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S31600, UNS S31603.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of Measure316316L
Tensile Strengthksi75 min70 min
0.2% Yield Strengthksi30 min25 min
Elongation%40 min40 min
HardnessHV95 max95 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element316316L
CrChromium16.0-18.016.0-18.0
NiNickel10.0-14.010.0-14.0
MoMolybdenum2.00-3.002.00-3.00
MnManganese2.000 max2.000 max
SiSilicon0.750 max0.750 max
PPhosphorus0.045 max0.045 max
CCarbon0.080 max0.030 max
SSulfur0.030 max0.030 max
NNitrogen0.100 max0.100 max

304H

304H is a modification of 304 austenitic stainless steel with increased carbon content to allow for greater strength at higher temperatures. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S30409.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of Measure304H
Tensile Strengthksi70 min
0.2% Yield Strengthksi30 min
Elongation%40 min
HardnessHV92 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element 304H
CrChromium18.0-20.0
NiNickel8.0-10.5
MnManganese2.000 max
SiSilicon0.750 max
PPhosphorus0.045 max
CCarbon0.040-0.100
SSulfur0.030 max
NNitrogen0.100 max

310

310 offers moderate strength and corrosion resistance at high temperatures with its high chromium and medium nickel content. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S31008, UNS S31009.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of Measure310
Tensile Strengthksi77 min
0.2% Yield Strengthksi32 min
Elongation%35 min
HardnessHV90 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element 310
CrChromium24.0-26.0
NiNickel19.0-22.0
MoMolybdenum0.750 max
MnManganese2.000 max
SiSilicon0.750 max
PPhosphorus0.045 max
CCarbon0.080 max
SSulfur0.030 max
CuCopper0.500 max
FeIronBalance

347H

347H has increased resistance to intergranular corrosion and is useful in strongly oxidizing environments due to the addition of niobium (formerly columbium). Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S34709.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of Measure347H
Tensile Strengthksi75 min
0.2% Yield Strengthksi30 min
Elongation%40 min
HardnessHV92 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element 347H
CrChromium17.0-19.0
NiNickel9.0-13.0
MnManganese2.000 max
SiSilicon0.750 max
PPhosphorus0.045 max
CCarbon0.04-0.08
SSulfur0.030 max
Nb + TaNiobium + Tantalummin 10XC, max 1.0
FeIronBalance

321

321 is commonly used for service in the 1000-1600⁰ F temperature range, as it is stabilized with titanium. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S32100.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of Measure321
Tensile Strengthksi75 min
0.2% Yield Strengthksi30 min
Elongation%40 min
HardnessHV95 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element 321
CrChromium17.0-19.0
NiNickel9.0-12.0
MoMolybdenum0.750 max
MnManganese2.000 max
SiSilicon0.25-1.00
PPhosphorus0.040 max
CCarbon0.080 max
SSulfur0.030 max
NNitrogen0.100 max
CuCopper0.750 max
TiTitaniummin 5x(C+N), max 0.700
FeIronBalance

317L

317L is an austenitic stainless steel with higher corrosion resistance when compared to 316L. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S31703.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of Measure317L
Tensile Strengthksi80 min
0.2% Yield Strengthksi35 min
Elongation%40 min
HardnessHV96 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element 317L
CrChromium18.0-20.0
NiNickel11.0-15.0
MoMolybdenum3.0-4.0
MnManganese2.000 max
SiSilicon0.750 max
PPhosphorus0.045 max
CCarbon0.030 max
SSulfur0.030 max
NNitrogen0.100 max

Alloy 20

Alloy 20 utilizes its nickel, chromium, molybdenum and copper components to provide superior corrosion resistance. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS N08020.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of MeasureAlloy 20
Tensile Strengthksi80 min
0.2% Yield Strengthksi35 min
Elongation%30 min
HardnessHV95 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element Alloy 20
CrChromium19.0-21.0
NiNickel32.5-35.0
MoMolybdenum2.0-3.0
MnManganese2.000 max
SiSilicon1.000 max
PPhosphorus0.035 max
CCarbon0.060 max
SSulfur0.035 max
CuCopper3.0-4.0
Nb + TaNiobium + Tantalum8xC 1.0 min
FeIronBalance

Duplex 2205

Duplex 2205 is a austenitic-ferritic stainless steel. Its high chromium, molybdenum, and nitrogen components provide higher strength and corrosion resistance when compared to 304 and 316 stainless. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S31803, UNS S32205.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of MeasureDuplex 2205
UNS 31803		Duplex 2205
UNS 32205
Tensile Strengthksi90 min95 min
0.2% Yield Strengthksi65 min65 min
Elongation%25 min25 min
HardnessHV293 max293 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.

Composition

Element Duplex 2205
UNS 31803		Duplex 2205
UNS 32205
CrChromium21.0-23.022.0-23.0
NiNickel4.5-6.54.5-6.5
MoMolybdenum2.5-3.53.0-3.5
MnManganese2.000 max2.000 max
SiSilicon1.000 max1.000 max
PPhosphorus0.030 max0.030 max
CCarbon0.030 max0.030 max
SSulfur0.020 max0.020 max
NNitrogen0.200 max0.200 max
FeIronBalanceBalance

 


Please view our Nickel Alloy Grades