Zhejiang Guanyu Stainless Steel Tube Co., Ltd  
  Directory | Useful Tool | Sitemap | Contact US | Home

         

Standard

Chemical Composition of AISI and UNS Heat Resisting Stainless Steel






Most ASTM and ASME standards list the steel grades by their UNS (Unified Numbering system) numbers but also make reference, where appropriate to the more general AISI (American Iron and Steel Institute) grade designations. These grade numbering systems are widely used in the USA, where they originated and are recognised by most stainless steel specifiers and users. 

The American Iron and Steel Institute (AISI) developed designations such as 309, 310 etc and published compositions for these in their 'Steel Products Manual' (1974).

These are NOT specifications, but steel grade composition ranges only.

These grades were used by the American Society Testing and Materials (ASTM) to identify grades in a wide range of standards they published for stainless products, such as sheets and plates (ASTM A240), bars (ASTM A276) and tubes (ASTM A269).

The compositions of the AISI grades were made more specific with the introduction of the 'Unified Numbering System', jointly established by ASTM and SAE (Society of Automotive Engineers).



This five digit number, preceded by the letter 'S' for most stainless steel, identified the specific variant of the grade

e.g. 309 being UNS S30900, 304H being UNS S30409

American Society of Mechanical Engineers (ASME) publish design codes and standards for pressure applications. ASME standards are generally based on the appropriate ASTM standards, but the standard numbers are preceded with the letters 'SA', rather than just the 'A' of the ASTM standards. 

Where UNS grade numbers are used, these are universal, regardless of the product type or the standard in which they appear.

The AISI designations have been adopted in Japan. The AISI number is preceded with the letters SUH for heat resisting grades e.g. SUH 310. 

The composition ranges should always be checked in the appropriate standard.

The tables in this article use the UNS number as their key, but also show the related AISI and SAE numbers. Where appropriate, common names for the steels are also shown.

Heat resisting grades

Designation Chemical composition % by mass max unless stated
UNS No SAE No AISI No / Common Name C Si Mn P S Cr Mo Ni Others
S21500 - Esshete 1250 0.06/0.15 0.20/1.0 5.50/7.0 0.045 0.030 14.0/16.0 0.80/1.20 9.00/11.0 B 0.003/0.009; Nb 0.75/1.25; V 0.15/0.40
S30409 - 304H 0.04/0.10 0.75 2.00 0.045 0.030 18.0/20.0 - 8.0/10.5 -
S30415 - 153MA 0.04/0.06 1.00/2.00 0.80 0.045 0.030 18.0/19.0 - 9.0/10.0 N 0.12/0.18; Ce 0.03/0.08
S30451 - 304N 0.08 0.75 2.00 0.045 0.030 18.0/20.0 - 8.0/10.5 N 0.10/0.16
S30452 - 304HN (XM-21) 0.08 0.75 2.00 0.045 0.030 18.0/20.0 - 8.0/10.5 N 0.16/0.30
S30615 - RA85H 0.16/0.24 3.2/4.0 2.00 0.030 0.030 17.0/19.5 - 13.5/16.0 Al 0.80/1.50
S30815 - 253MA 0.05/0.10 1.40/2.00 0.80 0.040 0.030 20.0/22.0 - 10.0/12.0 N 0.14/0.20; Ce 0.03/0.08
S30900 30309 309 0.20 1.00 2.00 0.045 0.030 22.0/24.0 - 12.0/15.0 -
S30908 30309S 309S 0.08 0.75 2.00 0.045 0.030 22.0/24.0 - 12.0/15.0 -
S30909 - 309H 0.04/0.10 0.75 2.00 0.045 0.030 22.0/24.0 - 12.0/15.0 -
S30940 - 309Cb 0.08 0.75 2.00 0.045 0.030 22.0/24.0 - 12.0/16.0 Nb 10xC / 1.10
S30941 - 309HCb 0.04/0.10 0.75 2.00 0.045 0.030 22.0/24.0 - 12.0/16.0 Nb 10xC / 1.10
S31000 30310 310 0.25 1.50 2.00 0.045 0.030 24.0/26.0 - 19.0/22.0 -
S31008 30310S 310S 0.08 1.50 2.00 0.045 0.030 24.0/26.0 - 19.0/22.0 -
S31009 - 310H 0.04/0.10 0.75 2.00 0.045 0.030 24.0/26.0 - 19.0/22.0 -
S31040 - 310Cb 0.08 1.50 2.00 0.045 0.030 24.0/26.0 - 19.0/22.0 Nb 10xC / 1.10
S31041 - 310HCb 0.04/0.10 0.75 2.00 0.045 0.030 24.0/26.0 - 19.0/22.0 Nb 10xC / 1.10
S31400 30314 314 0.25 1.50/3.00 2.00 0.045 0.030 23.0/26.0 - 19.0/22.0 -
S31609 - 316 0.04/0.10 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 -
S31651 - 316N 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10/0.16
S32109 - 321H 0.04/0.10 0.75 2.00 0.045 0.030 17.0/19.0 - 9.0/12.0 Ti 4x(C+N) / 0.70
S33228 - - 0.04/0.08 0.30 1.00 0.020 0.015 26.0/28.0 - 31.0/33.0 Al 0.025;Ce 0.05/0.10; Nb 0.6/1.0
S33400 - 334 0.08 1.00 1.00 0.030 0.015 18.0/22.0 - 19.0/21.0 Al 0.15/0.60; Ti 0.15/0.60
S34709 - 347H 0.04/0.10 0.75 2.00 0.045 0.030 17.0/19.0 - 9.0/13.0 Nb 8xC /1.00
S34800 - 348 0.08 0.75 2.00 0.045 0.030 17.0/19.0 - 9.0/13.0 Nb+Ta 10xC / 1.00; Ta 0.10; Co 0.20
S34809 - 348H 0.04/0.10 0.75 2.00 0.045 0.030 17.0/19.0 - 9.0/13.0 Nb+Ta 10xC /1.00; Ta 0.10; Co 0.20
S35045 - - 0.06/0.10 1.00 1.50 0.045 0.015 25.0/29.0 - 32.0/37.0 Al 0.15/0.60; Ti 0.15/0.60
S35315 - 353MA 0.04/0.08 1.20/2.00 2.00 0.040 0.030 24.0/26.0 - 34.0/36.0 N 0.12/0.18; Ce 0.03/0.10
S41041 - - 0.13/0.18 0.50 0.40/0.60 0.030 0.030 11.50/13.00 0.20 0.50 Al 0.05; Nb 0.15
S41425 - - 0.05 0.50 0.50/1.00 0.020 0.005 12.0/15.0 1.50/2.00 4.0/7.0 N 0.06/0.12; Cu 0.30
S41800 - Greek Ascoloy (615) 0.15/0.20 0.50 0.50 0.040 0.030 12.00/14.00 0.50 1.80/2.20 W 2.50/3.50
S42200 - 616 0.20/0.25 0.50 0.50/1.00 0.025 0.025 11.0/12.5 0.90/1.25 0.50/1.00 V 0.20/0.30; W 0.90/1.25
S42300 - Lapelloy (619) 0.27/0.32 0.50 0.95/1.35 0.025 0.025 11.00/12.00 2.50/3.00 0.50 V 0.20/0.30
S44300 - MT443 0.20 1.00 1.00 0.040 0.030 18.0/23.0 - 0.50 Cu 0.90/1.25
S44600 51446 446 0.20 1.00 1.50 0.040 0.030 23.0/27.0 - 0.75 N 0.25
S64152 - XM-32 0.08/0.15 0.35 0.50/0.90 0.025 0.025 11.00/12.50 1.50/2.00 2.00/3.00 N 0.01/0.05; V 0.25/0.40
N08800 - 800 (332) 0.10 1.00 1.50 0.045 0.015 19.0/23.0 - 30.0/35.0 Fe 39.5 min; Al 0.15/0.60; Ti 0.15/0.60
N08810 - 800H 0.05/0.10 1.00 1.50 0.045 0.015 19.0/23.0 30.0/35.0 30.0/35.0 Cu 0.75; Fe 39.5 min; Al 0.15/0.60; Ti 0.15/0.60
N08811 - - 0.06/0.10 1.00 1.50 0.040 0.015 19.0/23.0 - 30.0/35.0 Cu 0.75; Fe 39.5 min; Al 0.15/0.60; Ti 0.15/0.60

  Stainless Steel Tube/Pipe/Tubing, Nickel Alloy Tubing, Brass Alloy Tubing, Copper Nickel Pipe Material Grades


Related References:
1. Chemical Composition of AISI and UNS Austenitic Stainless Steel
2. Chemical Composition of ACI Heat Resisting Stainless Steel
3. Chemical Composition of AISI and UNS Ferritic Stainless Steel
4. Chemical Composition of AISI and UNS Duplex Stainless Steel
5. Chemical Composition of AISI and UNS Heat Resisting Stainless Steel
6. Chemical Composition of AISI and UNS Martensitic and Precipitation Hardening


TubingChina.com All Rights Reserved

Directory | Standard | Heat | Heat Exchanger | Temperature | Pressure | Corrosion | Hardness | Surface | Properties | Select Stainless Steel | Contact US

Useful Tools:

Stainless Steel Weight Calculator
Metals Weight Calculator
Nickel Alloy Weight Calculator
Copper Brass Alloy Weight Calculator
Copper Brass Alloy Sheet Plate Weight Calculator
Sheet Plate Weight Calculator
Hardness Conversion Calculator
Hardness Conversion Chart
Rockwell Brinell Vickers Shore Hardness Conversion Chart
Conversion Calculator
Length Weight Temperature Volume Pressure Calculater
Pipe Working Pressure Calculator
Pressure Conversion Converter
Round Bar Size Calculator
Gauge Sizes
Sheet Metal Gauge
Pipe Schedule
Nominal Pipe Size
ANSI Pipe Chart
Inch to mm Chart
Stainless Steel Pipe Sizes
Stainless Steel Tubing Sizes Chart
Stainless Steel L H Grade
Stainless Steel Density
Conversion of Stainless Steel
Nickel Alloy Grades Comparison Material Grade Chart Carbon Steel
Structural Steel Comparison Chart



Main Products:

BA Tube | AP Tube
Condenser Tubes Tubing
Stainless Steel Reheater Tube Superheater Tubes
Stainless Steel U bend Tube
Nickel Alloy U bend Tubes
Copper Alloy U Bend Tubes
Heat Exchanger Tube
Super Duplex Pipe
Nickel Alloy Tube
Brass Alloy Tubing
Copper Nickel Alloys Tubes
Stainless Steel Hollow Tube
Stainless Steel Oval Tubing
Stainless Steel Square Tubing
Stainless Steel Rectangular Tubing
Stainless Steel Capillary Tube
Duplex Stainless Steel Pipe
Seamless Stainless Steel Tubing
Corrugated Stainless Steel Tubing
Stainless Steel Twisted Tube
Polishing Stainless Steel Tubing
Stainless Steel Aircraft Tube
Stainless Steel Hydraulic Tubing
Stainless Steel Instrumentation Tubing
Stainless Steel Angle Iron Bar
Stainless Steel Mechanical Tube
Bright Annealing Stainless Tube
Heat resistant Stainless Steel
Stainless Steel Welded Pipe
Extruded Serrated Finned Tubes Integral Finned Tubes / Extruded Aluminum Finned Tubes
Brass Alloys Copper Nickel Alloy Integral Low Finned Tubes
HFW High Frequency Welded Helical Spiral Serrated Finned Tubes
Corrosion Resistant Stainless Steel
Corrosion Resistance Stainless Steel

Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
316Ti Stainless Steel Tube
317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Stainless Steel Pipe
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube