DN	NPS	OD(MM)	SCH5S	SCH10S	SCH40S	STD	SCH40	SCH80	XS	SCH80S	SCH160	XXS
6	1/8	10.3	-	1.24	1.73	1.73	1.73	2.41	2.41	2.41	-	-
8	1/4	13.7	-	1.65	2.24	2.24	2.24	3.02	3.02	3.02	-	-
10	3/8	17.1	-	1.65	2.31	2.31	2.31	3.2	3.2	3.2	-	-
15	1/2	21.3	1.65	2.11	2.77	2.77	2.77	3.73	3.73	3.73	4.78	7.47
20	3/4	26.7	1.65	2.11	2.87	2.87	2.87	3.91	3.91	3.91	5.56	7.82
25	1	33.4	1.65	2.77	3.38	3.38	3.38	4.55	4.55	4.55	6.35	9.09
32	11/4	42.2	1.65	2.77	3.56	3.56	3.56	4.85	4.85	4.85	6.35	9.7
40	11/2	48.3	1.65	2.77	3.56	3.56	3.56	4.85	4.85	4.85	6.35	9.7
50	2	60.3	1.65	2.77	3.91	3.91	3.91	5.54	5.54	5.54	8.74	11.07
65	21/2	73	2.11	3.05	5.16	5.16	5.16	7.01	7.01	7.01	9.53	14.02
80	3	88.9	2.11	3.05	5.49	5.49	5.49	7.62	7.62	7.62	11.13	15.24
90	31/2	101.6	2.11	3.05	5.74	5.74	5.74	8.08	8.08	8.08	-	-
100	4	114.3	2.11	3.05	6.02	6.02	6.02	8.56	8.56	8.56	13.49	17.12
125	5	141.3	2.77	3.4	6.55	6.55	6.55	9.53	9.53	9.53	15.88	19.05
150	6	168.3	2.77	3.4	7.11	7.11	7.11	10.97	10.97	10.97	18.26	21.95
200	8	219.1	2.77	3.76	8.18	8.18	8.18	12.7	12.7	12.7	23.01	22.23
250	10	273.1	3.4	4.19	9.27	9.27	9.27	15.09	12.7	12.7	28.58	25.4

After adding Ti as a stabilizing element, 321 stainless steel exhibits excellent hot strength, which is better than 316L steel. It has excellent wear resistance in various organic and inorganic acids even at different concentrations and temperatures. Additionally, Type 321 stainless steel is particularly effective in oxidizing environments. This makes it ideal for fabricating acid resistant vessels, equipment linings and piping. The composition of 321 stainless steel includes nickel (Ni), chromium (Cr) and titanium (Ti), which is an austenitic stainless steel alloy. Similar to 304 stainless steel with similar properties. However, the addition of titanium improves its corrosion resistance along grain boundaries and enhances its strength at high temperatures. The addition of titanium effectively prevents the formation of chromium carbides in the alloy. 321 stainless steel has excellent properties in terms of high temperature stress rupture and creep resistance. Its mechanical properties under high temperature conditions exceed those of 304 stainless steel. Therefore, it is ideal for welding applications involving components operating at high temperatures.

Grade	C≤	Si≤	Mn≤	S≤	P≤	Cr	Ni	Ti≥
321	0.08	1.00	2.00	0.030	0.045	17.00~19.0	9.00~12.00	5*C%

Q1:How about the shipping fees? Shipping costs are affected by many factors. If time is of the essence, express delivery is the best option, although at a higher cost. For larger quantities, sea freight is a more suitable option, although it takes longer. To receive an accurate shipping quote considering quantity, weight, method and destination, please contact us. Q2:What are your prices? Please note that our prices are subject to change due to factors such as supply and market conditions. To ensure you receive the most accurate and up-to-date pricing information, we kindly ask you to contact us directly. We will be happy to provide you with an updated price list. Thank you for your cooperation and understanding. Q3:Do you have a minimum order quantity? If you would like more details about minimum order requirements for specific international products, please feel free to contact us. We are here to help you and provide you with the necessary information. Please feel free to contact us at your convenience.The density of stainless steel 321 is 7.93g /cm3σb (MPa)：≥520 σ0.2 (MPa)：≥205 δ5 (%)：≥40 ψ (%)：≥50 Hardness ：≤187HB;≤90HRB;≤200HV