SAE J356 Type-A tubing is also covered by this specification. Standard SAE J356 and SAE J356 Type-A have the same mechanical properties and performance requirements. Therefore, the designated differences of Type-A tubing are not intended to imply that Type-A tubing is inferior to standard SAEJ356 tubing. 

Its purpose is to recognize the unique manufacturing differences associated with small-diameter, light-weight wall sizes (typically 15.88 mm OD x 1.24 mm wall and smaller). Here are the primary differences between SAE J356 and SAE J356 Type-A tubing. Type-A tubing is heat treated in-line to relieve stress and generally comes coiled.

Straight Type-A tubing can only be produced through secondary straightening and cut-to-length operations when Type-A tubing is produced in coil form. The SAE J356 standard is produced as straight lengths and then undergoes a secondary normalizing operation. Unless a “Type-A” designation is specified, all SAE J356 requirements apply to Type-A tubing. Type-A is also available in standard SAE J356 sizes, in which case all the standard SAE J356 specifications apply.

In contrast to J356, which is annealed separately, SAE J356 Type-A covers small diameter, light wall tubing (typically 5/8″ OD x 18Ga and under). The performance requirements for Type-A tubes are the same as for J356 tubes, but the ranges for Carbon and Manganese are wider. It is common for Type-A tubes to be produced in coil form, although they can be cut and straightened by secondary operations.

The specification covers electric resistance welded, flash controlled, normalized, single wall, low carbon steel pressure tubing. This tubing is suitable for bending, double flaring, beading, forming, and brazing in pressure lines and other applications. This material cannot be used for single flare applications due to the potential leak path caused by the ID weld bead.

In contrast to J356, which is annealed separately, SAE J356 Type-A covers small diameter, light wall tubing (typically 5/8″ OD x 18Ga and under). The performance requirements for Type-A tubes are the same as for J356 tubes, but the ranges for Carbon and Manganese are wider. Type-A tubes have the same performance requirements as J356 tubes, but the ranges for Carbon and Manganese are wider. Type-A tubes are often produced in coil form although they can be cut and straightened through secondary operations.

SAE J356 Type-A tubing is also covered by this specification. SAE J356 Type-A and SAE J356 Type-B have the same mechanical properties and performance requirements. As defined by the SAE J356 or SAE J356 Type-A designation, coiled and straight material are manufactured differently. This tubing has nominal reference working pressures listed in ISO 10763 for metric tubing and SAE J1065 for inch tubing. During the secondary heat treat operation, SAE J356 is produced in straight lengths. A coil of SAE J356 Type-A tubing is heat treated in-line to relieve stresses.

Specifications

SAE-J356

Welded Flash Controlled Low Carbon Steel Tubing Normalized for Bending. Double Flaring and Beading. Covers normalized electric resistance welded tube ID flash-controlled .005″ to .010″ manipulative quality.

Testing

According to SAE J1677, tubing produced to this specification will be subjected to the following tests: Flattening Test, Flaring Test, Reverse Flattining Test, Expansion Test, Hardening Test, Tensile Test, Pressure Proof Test and a Nondestructive Electronic Test.

Inside Flash Height

Nominal Wall Thickness Inches	Maximum Flash Height Through 1” OD (Inches)	Maximum Flash Height Over 1” OD (Inches)
Less Than .035	.005	.010
.035 Through .065	.008	.010
Greater Than .065	.010	.010

Tubing Outside Diameter Tolerances

Nominal Tube OD (Inches)	Tube OD Tolerance (+/- Inches)
Up to 3/8	.0025
Over 3/8 to 5/8	.003
Over 5/8 to 1-1/8	.0035
Over 1-1/8 to 2	.005
Over 2 to 2-1/2	.006
Over 2-1/2 to 3	.008
Over 3 to 3-1/2	.009
Over 3-1/2 to 4	.010

Tubing Wall Thickness Tolerances

Nominal Wall Thickness (Inches)	Nominal Tube OD Through 1” (+/- Inches)	Nominal Tube OD Over 1” Through 2” (+/- Inches)	Nominal Tube OD Over 2” Through 4” (+/- Inches)
.028 (22 Ga)	.002/.003	.003/.003	.003/.003
.035 (20 Ga)	.002/.004	.002/.004	.002/.004
.042 (19 Ga)	.002/.004	.002/.004	.002/.005
.049 (18 Ga)	.004/.005	.003/.005	.004/.008
.058 (17 Ga)	.006/.006	.004/.008	.004/.008
.065 (16 Ga)	.006/.006	.004/.008	.004/.008
.072 (15 Ga)	.006/.010	.006/.010	.006/.010
.083 (14 Ga)	.006/.010	.006/.010	.006/.010
.095 (13 Ga)	.006/.010	.006/.010	.006/.010
.100	.006/.010	.006/.010	.006/.010
.109 (12 Ga)	.006/.010	.006/.010	.006/.010
.118	.006/.010	.006/.010	.006/.010
.120 (11 Ga)	.006/.010	.006/.010	.006/.010
.134 (10 Ga)	.006/.010	.006/.010	.006/.010
.148 (9 Ga)	—	.007/.001	.007/.011
.156 (5/32)	—	.007/.011	.007/.011
.165 (8 Ga)	—	.007/.011	.007/.011
.180 (7 Ga)	—	.007/.011	.007/.011
.197	—	.008/0.12	.008/0.12
.203 (6 Ga)	—	.008/0.12	.008/0.12
.219 (7/32)	—	.008/.012	.008/.012
.236	—	.014/.018	.014/.018
.238 (4 Ga)	—	.014/.018	.014/.018
.259 (3 Ga)	—	.014/.020	.014/.020

Chemical Requirements

Element	Cast or Heat Analysis: Weight %
	J356	J356 Type-A
Carbon	0.06 Min/0.18 Max	0.02 Min/0.18 Max
Manganese	0.30 Min/0.60 Max	0.10 Min/0.60 Max
Phosphorus	0.04 Max	0.04 Max
Sulfur	0.06 Max	0.05 Max

Mechanical Properties

Properties	Values
Yield Strength (Min)	25,000 PSI
Tensile Strength (Min.)	45,000 PSI
Elongation in 2” (Min)	35% a
Hardness (Rockwell B)(Max)	65 b

a	For tubing having a nominal OD of 3/8” or less, and/or wall thickness of .035” or less, a minimum elongation of 25% is permissible.
b	The hardness test shall not be required on tubing with a nominal wall thickness of less than .065” (16 Ga).

A single strip of steel is shaped into a tubular shape by electric resistance welding. Welding techniques or cutting are used to control the inside flash after welding. By annealing on-line, ductility and uniform grain structure are achieved. Normalized electric resistance welded low carbon steel pressure tubing is designed for use as pressure lines and in other applications requiring tubing of a quality suitable for bending, double flaring, beading, and brazing.

Tubing Flash Tolerances, Inches

Nominal Wall Thickness	Nominal Tubing Outside Diameter
	Thru 1.000	Over 1.000
	Maximum Flash Height
Thru 0.035	0.005	0.010
Over 0.035 thru 0.065	0.008	0.010
Over 0.065	0.010	0.010

ASTM A519 1026 Alloy Steel Tubing Dimensions

OD	Wall Thickness	Length
Cold Drawn	3/4 to 15 Inch	1/8 to 1 1/2 Inch	12000 mm max
Hot Rolled	2 to 30 Inch	1/8 to 8 Inch	12000 mm max

Stainless Steel 316/316L Seamless Pipe Specification

Alloy 316 / 316L Specification	Stainless Steel 316 / 316L, 316 – 316L SS
SS UNS S31600 Pipe	316 Stainless Steel Pipe
SS UNS S31603 Seamless Pipe Size	4 to 219mm W. T.: 0.5 to 20mm
316 – 316L Steel Welded Pipe Size	5.0 mm – 1219.2 mm
UNS S31600/S3160 EFW Pipe size	5.0 mm – 1219.2 mm
ASTM A312 Stainless Steel Pipe Swg & Bwg	10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
TP316 SS Pipe Schedule	SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
SS UNS S31600 Swg & Bwg	10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
316 Stainless Steel Tube wall thickness	0.020″ –0.220″, (special wall thicknesses available)
316L SS Length	Single Random, Double Random, Standard & Cut length Pipe & Tube
316 SS Finish	Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF
SS 316L Form	Round, Hydraulic, ‘U’ bent or Hollow,LSAW, Boiler, Straight Pipe, Clad Pipe, Rectangular, Square Pipe Etc
Stainless Steel 316 / 316L Type	Welded, Seamless, ERW, EFW, Fabricated Pipe, ‘U’ bent or Hollow, Hydraulic, LSAW, Boiler, Straight Tube, Tube Coil, Round, Rectangular, Square Tube etc
316L SS End	Plain End, Beveled End, Treaded Pipe
SS UNS S31603 Marking	All 316 SS Pipe are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer’s request.)
SS 316 Application	Oil Pipe & Tube, Gas Pipe & Tube, Fluid Pipe & Tube, Boiler Pipe & Tube, Heat exchanger Tube
316 – 316L SS Value Added Service	Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc.
SS GOST 03Ch17N14M3 Specialise in	316 – 316L Stainless Steel Large Diameter Pipe Alloy 316 / 316L Capillary Tube Stainless Steel 316 Heat Exchanger & Stainless Steel 316L Condenser Tube
We can also cut, thread, and groove 316 Stainless Steel Pipe to meet your specifications. Pipe Dimension ANSI/ ASME B36.10, B36.19, B2.1

Equivalents of Stainless Steel 316/316L Seamless Pipe

STANDARD	316	316L	316TI
UNS	S31600	S31603	S31635
WERKSTOFF NR.	1.4401	1.4404	1.4571

Chemical Composition of Stainless Steel 316/316L Seamless Pipe

ELEMENT	316	316L
NI	11.0 – 14.0	10.0 – 14.0
C	0.08 max	0.035 max
MN	2.0 max	2.0 max
P	0.045 max	0.045 max
S	0.30 max	0.30 max
SI	1.0 max	1.0 max
CR	16.0 – 18.0	16.0 – 18.0
MO	2.0 – 3.0	2.0 – 3.0
TI
N

Typical Mechanical Properties of Stainless Steel 316/316L Seamless Pipe

CONDITION & GRADE	TENSILE STRENGTH ksi (Mpa)	YIELD STRENGTH ksi (Mpa)	ELONGATION %	HARDNESS
SS 316	75 (515)	30 (205)	35	90 HRB max
SS 316L	70 (485)	25 (170)	35	90 HRB max