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High Purity Stainless Steel Tubing

To ensure the highest surface quality RathGibson goes beyond the requirements of ASTM A269 and A270 by performing the full battery of ASTM bend and deformation tests required by ASME SA249 as well as additional deformation tests developed by RathGibson. The tests, combined with specific raw material requirements, Eddy Current testing at the tube mill, 100% bore-scoping prior to mechanical polish, and tighter OD and wall tolerances allow RathGibson to provide a more consistent superior quality product.

View Spec Sheet (PDF)

Chemical Composition

Elements	316L (wt%)

(C) Carbon, max	0.035
(Mn) Manganese, max	2.00
(P) Phosphorus, max	0.040
(S) Sulfur	0.005 - 0.017
(Si) Silicon, max	0.75
(Ni) Nickel	10.0 - 15.0
(Cr) Chromium	16.0 - 18.0
(Mo) Molybdenum	2.0 - 3.0

Rath's certified Class 100 Cleanroom

Dimensional Tolerences
all dimensions in inches (mm)

Size OD	Nominal Wall	Outside Diameter	Length	Wall

1/2" (12.7)	0.065" (1.65)	+/-0.005 (0.13)	+1/8" (3.18) - 0	+/-10.0%
3/4" (19.1)	0.065" (1.65)	+/-0.005 (0.13)	+1/8" (3.18) - 0	+/-10.0%
1" (25.4)	0.065" (1.65)	+/-0.005 (0.13)	+1/8" (3.18) - 0	+/-10.0%
1-1/2" (38.1)	0.065" (1.65)	+/-0.008 (0.20)	+1/8" (3.18) - 0	+/-10.0%
2" (50.8)	0.065" (1.65)	+/-0.008 (0.20)	+1/8" (3.18) - 0	+/-10.0%
2-1/2" (63.5)	0.065" (1.65)	+/-0.010 (0.25)	+1/8" (3.18) - 0	+/-10.0%
3" (76.2)	0.065" (1.65)	+/-0.010 (0.25)	+1/8" (3.18) - 0	+/-10.0%
4" (101.6)	0.083" (2.11)	+/-0.015 (0.38)	+1/8" (3.18) - 0	+/-10.0%
6" (152.4)	0.109" (2.77)	+/-0.030 (0.76)	+1" (25.4) -0	+/-10.0%

Surface finish is 20 μ-in Ra (0.5 μm) ID maximum, 30 μ-in Ra (0.8 μm) OD maximum measured per ASME/ANSI B46.1 with the profilometer reading at 90 degrees to major polishing pattern.

Hydrogen bright annealed in line to 1900°F (1040°C) minimum and rapidly quenched.

RathGibson A270-BPE high purity tubing ID is thermocouple cleaned per ASTM A632 S3.

Tubing exceeds the requirements of ASME BPE SF1 and ASTM A270 S2. All tubing will be 100% bore-scoped and certified to 20 μ-in Ra (0.5 μm) ID maximum, 30 μ-in Ra (0.8 μm) OD maximum surface roughness measured per ASME/ANSI B46.1 with the profilometer reading at 90 degrees to major polishing pattern.

As a final step in maintaining purity standards, RathGibson’s A270-BPE tubing is packaged using protective 2 mil poly sleeving along with air tight plastic end caps. The tubing is then placed in triple wall boxes for maximum protection during shipment. Other packaging is available on request.