Zhejiang Pengye Stainless Steel Co.,Ltd.

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Introduction

Development

Size Deviations

Steel Grades

Company Overview

Development New Products

In 2007,the company camied out R&D of the new steel types, especially the duplex stainless steel,Duplex Stainless steel can be divided into four types: low alloy,medium alloy,high alloy and duplex stainless steel.

Comparison of Approximate Values of Common Duplex Stainless Steel Grades and Grades of Different Countries

Type/Country	China	USA	Swoden	Genmang	France	Japn
Low alloy	00ci23ni4n	un23 （saf2304）	ss232 （saf2304）	w．nr.1.4362	ur35n	dp11
Medium alloy	00cr18ni5mo3si2 00cr22ni5mo3n	uns s31500 uns s31803	ss2376(3re60) ss2377(saf2205)	w.nr.1.4417 w.nr.1.4462	ur45n	dp1 dp8
High alloy	0cr25ni5mo2 00cr25ni7mo3wcun	uns s32900 uns s31260	ss2324(10re51)	w.nr.1.4460 w.nr.1.4501		329j1 329j2l
Super duplex stainless steel	00cr25ni7mo4n 00cr25ni6mo3cun	uns s32750 uns s32550	ss2328(saf2507)	w.nr.1.4410 w.nr.1.4507	ur47n+ ur52n+

Related standard of stainless steel products adopted by our company：

Seamless and welded tubed	Matenrial
Duplex Stainless steel	ASTMA789 ASTMA790 ASTMA450 ASTMA530 GB/T14976 GB/T14975 GB/T13296

Perormance of common duplex stainless steel:
1、Chemical components(%)

Grade	C≤	Mn≤	Si≤	S≤	P≤	Cr	Ni	Mo	Cu≤	N
s32750（saf2507） 00cr22ni7mo4n	0.03	1.20	0.80	0.020	0.035	24.0/ 26.0	6.0/ 8.0	3.0/ 5.0	0.50	0.24/ 0.32
s31803（saf2205） 00cr22ni5mo3n	0.03	2.00	1.0	0.02	0.030	21.0/ 23.0	4.50/ 6.50	2.50/ 3.50		0.08/ 0.20
s31500（3re60） 00cr18ni5mo3si2	0.03	1.2/ 2.00	1.4/ 2.00	0.030	0.030	18.0/ 19.0	4.25/ 5.25	2.50/ 2.00		0.05/ 0.10

2．Mechanical performance:

Grade\Item	Heat treatment system(℃)	ab（mpa）≥	as（mpa）≥	∮ ≥	Brinell	Rockwell
s32750（saf2507） 00cr22ni5mo3n	1025-1125	800	550	15	310	32
s31803（saf2205） 00cr22ni5mo3n	1020-1100	620	450	25	290	30.5
s31500（3re60） 00cr18ni5mo3si2	980-1040	630	440	30	290	30.5