ASME B16.9 ASTM A403 Alloy 321 SMLS 90DEG Long Radius Elbow 457 x 7.92MM

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N	Other
321	min. max	– 0.08	2.00	0.75	0.045	0.030	17.0 19.0	–	9.0 12.0	0.10	Ti=5(C+N) 0.70
321H	min. max	0.04 0.10	2.00	0.75	0.045	0.030	17.0 19.0	–	9.0 12.0	–	Ti=4(C+N) 0.70
347	min. max	0.08	2.00	0.75	0.045	0.030	17.0 19.0	–	9.0 13.0	–	Nb=10(C+N) 1.0

Mechanical Properties

Typical mechanical properties for grade 321 stainless sheets of steel are given in table 2.

Table 2. Mechanical properties of 321-grade stainless steel

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50 mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50 mm) min	Rockwell B (HR B) max	Brinell (HB) max
321	515	205	40	95	217
321H	515	205	40	95	217
347	515	205	40	92	201

Physical Properties

Typical physical properties for annealed grade 321 stainless sheets of steel are given in table 3.

Table 3. Physical properties of 321-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)
Grade	Density (kg/m3)	Elastic Modulus (GPa)	0-100 °C	0-315 °C	0-538 °C	at 100 °C	at 500 °C	Specific Heat 0-100 °C (J/kg.K)	Electrical Resistivity (nΩ.m)
321	8027	193	16.6	17.2	18.6	16.1	22.2	500	720

Grade Specification Comparison

Table 4. Grade specifications for 321-grade stainless steel

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
Grade	UNS No	BS	En	No	Name	Swedish SS	Japanese JIS
321	S32100	321S31	58B, 58C	1.4541	X6CrNiTi18-10	2337	SUS 321
321H	S32109	321S51	–	1.4878	X10CrNiTi18-10	–	SUS 321H
347	S34700	347S31	58G	1.4550	X6CrNiNb18-10	2338	SUS 347

2018581714532434512 - ASME B16.9 ASTM A403 Alloy 321 SMLS 90DEG Long Radius Elbow 457 x 7.92MM

Dimensions Butt Weld Elbows 45°-90° LR and 3D ASME B16.9

NPS	O.D.	90°	45°	90°	45°
	D	Long Rad	Long Rad	3D	3D
		Center to End	Center to End	Center to End	Center to End
		A	B	A	B
18	457	686	286	1372	568
20	508	762	318	1524	632
22	559	838	343	1676	694
24	610	914	381	1829	757
26	660	991	406	1981	821
28	711	1067	438	2134	883
30	762	1143	470	2286	946
32	813	1219	502	2438	1010
34	864	1295	533	2591	1073
36	914	1372	565	2743	1135
38	965	1448	600	2896	1200
40	1016	1524	632	3048	1264
42	1067	1600	660	3200	1326
44	1118	1676	695	3353	1389
46	1168	1753	727	3505	1453
48	1219	1829	759	3658	1516

Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.

DIMENSIONAL TOLERANCES OF BUTT WELD ELBOWS – 45° AND 90° – LR AND 3D – ASME B16.9

Nominal Pipe Size	1/2 to 2½	3 to 3½	4	5 to 8
Outside Diameter at Bevel (D)	+ 1.6 – 0.8	1.6	1.6	+ 2.4 – 1.6
Inside Diameter at End	0.8	1.6	1.6	1.6
Center to End LR (A/B)	2	2	2	2
Center to End 3D (A/B)	3	3	3	3
Nominal Pipe Size	10 to 18	20 to 24	26 to 30	32 to 48
Outside Diameter at Bevel (D)	+ 4 – 3.2	+ 6.4 – 4.8	+ 6.4 – 4.8	+ 6.4 – 4.8
Inside Diameter at End	3.2	4.8	+ 6.4 – 4.8	+ 6.4 – 4.8
Center to End LR (A/B)	2	2	3	5
Center to End 3D (A/B)	3	3	6	6
Wall Thickness (t)	Not less than 87.5% of Nominal Wall Thickness

Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.

Note:

MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 – NPS 24. Except with regard to the outside diameter at the bevel.

elbows9045 - ASME B16.9 ASTM A403 Alloy 321 SMLS 90DEG Long Radius Elbow 457 x 7.92MM

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