ASTM A358 Grade 304 ASME SA358 Grade 304L EFW Pipes

Recently, C&N is producing a batch of EFW WELDED pipes of A358 304L. Regarding the packaging, in order to reassure the customers, we have made very thorough and complete preparations.

Our Package

The packaging of these pipes features a multi – protective design. First, wooden pads are placed at the end of the pipes. These wooden pads act as a buffer, effectively preventing damage to the pipe ends during transportation and storage. Then, the main bodies of the pipes are wrapped with white woven cloth, which is further secured with transparent adhesive tape. This packaging method provides comprehensive protection, reducing the risk of scratches and collisions, and ensuring the pipes remain in good condition before delivery.

Packaged with protective fabric and wooden frame — Packaged with protective fabric

ASTM A358 Grade 304L Stainless Steel EFW Pipes (UNS S30403 CLASS 1 / 2 / 3 / 4 / 5), ASTM A358 Grade 304L EFW Pipes, ASME SA358 grade 304L EFW Pipes, ASTM A358 TP304L EFW Welded Pipes, ASTM A358 Grade 304L Stainless Steel EFW Pipes, ASTM A358 Grade 304L Electric Fusion Welded Pipes, ASTM A358 Grade 304L EFW Pipes in Class 1, 2, 3, 4, 5.

ASTM A358/ASME SA358 Stainless Steel Electric-Fusion-Welded (EFW) Pipes
Standard Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications

The ASTM A358 specification covers electric-fusion-welded austenitic chromium-nickel stainless steel pipes suitable for corrosive, high-temperature, or general applications.
This standard uses the dimensionless designator NPS (nominal pipe size) instead of traditional terms such as “nominal diameter,” “size,” and “nominal size.”
This specification covers the grades of alloy and stainless steel listed in Table 1. The purchaser shall select the proper grade and heat treatment requirements based on the service conditions to be encountered.

Five classes of pipe are covered as follows:

Class 1: Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.
Class 2: Pipe shall be double welded by processes employing filler metal in all passes. No radiography is required.
Class 3: Pipe shall be single welded by processes employing filler metal in all passes, and complete radiography is required.
Class 4: Same as Class 3, except the weld pass exposed to the inside of the pipe may be made without filler metal (see 6.2.2.1 and 6.2.2.2).
Class 5: Pipe shall be double welded by processes employing filler metal in all passes, and spot radiography is required.

ASTM A358 Grade 304L Stainless Steel EFW Pipes Chemical Composition

Typical compositional ranges for grade 304 stainless steels Pipes

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
304	min.	–	–	–	–	–	18.0	–	8.0	–
304	max.	0.08	2.0	0.75	0.045	0.030	20.0		10.5	0.10
304L	min.	–	–	–	–	–	18.0	–	8.0	–
304L	max.	0.030	2.0	0.75	0.045	0.030	20.0		12.0	0.10
304H	min.	0.04	–	–	-0.045	–	18.0	–	8.0	–
304H	max.	0.10	2.0	0.75		0.030	20.0		10.5

ASTM A358 Grade 304L Stainless Steel EFW Pipes Mechanical Properties

Mechanical Properties of 304 grade stainless steel

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell B (HR B) max	Brinell (HB) max
304	515	205	40	92	201
304L	485	170	40	92	201
304H	515	205	40	92	201
304H also has a requirement for a grain size of ASTM No 7 or coarser.

ASTM A358 Grade 304L Stainless Steel EFW Pipes Physical Properties

Physical properties of 304 grade stainless steel in the annealed condition

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
304/L/H	8000	193	17.2	17.8	18.4	16.2	21.5	500	720

Specification Grade Comparison for ASTM A358 Grade 304L Stainless Steel EFW Pipes

Grade specifications for 304 grade stainless steel

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
Grade	UNS No	BS	En	No	Name	Swedish SS	Japanese JIS
304	S30400	304S31	58E	1.4301	X5CrNi18-10	2332	SUS 304
304L	S30403	304S11	–	1.4306	X2CrNi19-11	2352	SUS 304L
304H	S30409	304S51	–	1.4948	X6CrNi18-11	–	–
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.