X2CrNiN18-7 1.4318 - NF EN 10028-7-2000

牌号	X2CrNiN18-7
	1.4318
对应标准	NF EN 10028-7-2000 压力容器用不锈钢扁平产品 Flat products made of steels for pressure purposes Part 7: Stainless steels
归类	奥氏体不锈钢
标签	标准等级

X2CrNiN18-7 化学元素成分含量(%)

成分	C	Si	Mn	P	S	Cr	Ni	N
最小值	-	-	-	-	-	16.5	6	0.1
最大值	0.03	1	2	0.045	0.015	18.5	8	0.2

◎ 未经买方同意，不得随意向钢中添加表中未列的元素，冶炼精加工除外。采取一切必要措施以防在废钢和生产原料中带入这些元素，因为其会削弱钢的机械性能，降低钢的适用性。

碳当量计算

X2CrNiN18-7 机械性能

条件	热处理或状态	抗拉强度 σ_b Mpa	屈服点 σ_s Mpa	断后伸长率或延伸率 δ %	冲击吸收能量 KV2 J
C：T ≤ 6	+AT	650~850	R_p0.2：≥350 R_p1.0：≥380 ①②	T ＜ 3mm: ≥35 T ≥ 3mm: ≥ 40 ②③	20℃： (l: ≥90；t: ≥60)
H：T ≤ 12	+AT	650~850	R_p0.2：≥330 R_p1.0：≥370 ①②	T ＜ 3mm: ≥35 T ≥ 3mm: ≥ 40 ②③	20℃： (l: ≥90；t: ≥60)
P：T ≤ 75	+AT	650~850	R_p0.2：≥330 R_p1.0：≥370 ①②	T ＜ 3mm: ≥35 T ≥ 3mm: ≥ 40 ②③	20℃： (l: ≥90；t: ≥60)

◎C- 冷轧带钢; H- 热轧带钢; P- 热轧中厚板；T- 厚度；t- 横向；l-纵向。
◎+A=软化退火；+AT=固溶退火；+QT=淬火及回火；+RA=再结晶退火。

◎ 如果热加工和随后冷却的条件符合ENISO3651-2中对产品机械性能和抗晶间腐蚀性的要求，则可以省略固溶处理。
*抗晶间腐蚀根据EN ISO 3651-2进行测试。在交货条件下：有；在致敏状态下：有。
① 对于连续热轧产品，可在询价和订购时商定Rp0.2(即表中σs)的最小值提高20MPa，Rp1.0的最小值提高10MPa。
② 如果在轧制宽度<300mm的带材情况下，采用纵向试验件，最小值减小如下:屈服强度-15MPa，恒定标距的延伸率-5%，比例标距延伸率-2%。
③ T＜3mm：该值适用于标距为80mm、宽度为20mm的试件，也可以使用标距为50mm、宽度为12.5mm的试件。T ≥3mm：该值适用于标距为5.65√S的试件。

高温下的最小屈服强度

Material designation		Heat treatment condition	Minimum 0.2% proof strength R_p0.2,MPa at a temperature (in°C) of:
Name	Number	Heat treatment condition	100	150	200	250	300	350	400	450	500	550	600
X2CrNiN18-7	1.4318	+AT	265	200	185	180	170	165	-	-	-	-	-
			Minimum 1.0% proof strength R_p1.0,MPa at a temperature (in°C) of:
			100	150	200	250	300	350	400	450	500	550	600
			300	235	215	210	200	195	-	-	-	-	-

① Determined by linear interpolation.

高温下的最小抗拉强度

Material designation Minimum tensile strength R_m,MPa
at a temperature (in°C) of:
Name Number 100 150 200 250 300 350 400 450 500 550 600
X2CrNiN18-7 1.4318 530 490 460 450 440 430 - - - - -

热处理指南

Material designation		Hot forming		Heat treatment symbol	Solution anneailing ①②		Post weld heat treatment Steel with ≤ 0.03% C
Name	Number	Temperature ℃	Type of cooling	Heat treatment symbol	Temperature ℃ ③④	Type of cooling	Temperature ℃ ⑥	Type of cooling
X2CrNiN18-7	1.4318	1150 to 850	air	+AT	1020 to 1100	water,air ⑤	900 to 940	air

◎ a=air; o=oil; w=water.
◎ Scale and annealing colours produced during hot forming, heat treatment or welding may adversely affect the corrosion resistance. They should be removed as far as possible before use, e.g. by pickling.
◎ The temperatures of annealing should be agreed for simulated heat treated test pieces.
① The solution treatment may be omitted if the conditions for hot working and subsequent cooling are such that the requirements for the mechanical properties of the product and the resistance to intergranular corrosion as defined in EN ISO 3651-2 are obtained and provided these requirements are met even after appropriate subsequent solution annealing.
② Re-crystallizing annealing.
③ If heat treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred, or even exceeded.
④ The lower end of the range specified for solution annealing should be aimed at for heat treatment as part of further processing,because otherwise the mechanical properties might be affected. If the temperature of hot forming does not drop below the lower temperature for solution annealing.a temperature of 980℃ is adequate as a lower limit for Mo-free steels,a temperature of 1000℃ for steels with Mo contents up to 3% and a temperature of 1020℃ for steets with Mo contents exceeding 3%.
⑤ cooling sufficiently rapid.
⑥ Minimum holding time:30min.

X2CrNiN18-7 对应不同标准

1	EN 10088-1-2005 不锈钢第1部分:不锈钢的清单
	X2CrNiN 18-7 1.4318
2	EN 10296-2-2005 机械工程和一般工程用焊接圆钢管.交货技术条件.第2部分:不锈钢
	X2CrNiN18-7 1.4318
3	ISO TS 15510-2003 技术规范不锈钢-化学成分
	X2CrNiN18-7
4	ISO 15510-2014 技术规范不锈钢-化学成分
	X2CrNiN18-7 4318-301-53-I
5	ISO 9328-7-2018 不锈钢承压扁钢制品
	X2CrNiN18-7
6	NF EN 10088-2-2005 普通用途不锈钢板和钢带的交货技术条件
	X2CrNiN18-7 1.4318
7	NF EN 10088-1-2005 不锈钢 - 第1部分：不锈钢清单
	X2CrNiN18-7 1.4318
8	NF EN 10028-7-2008 压力容器用不锈钢扁平产品
	X2CrNiN18-7 1.4318
9	NF EN 10296-2-2005 机械和一般工程用焊接圆钢管-交货技术条件-第2部分:不锈钢管
	X2CrNiN18-7 1.4318
10	NF EN 10028-7-2000 压力容器用不锈钢扁平产品
	X2CrNiN18-7 1.4318

注：数据仅供参考！如有疑问，请填写"我要纠错"！

Material designation		Minimum tensile strength R_m,MPa at a temperature (in°C) of:
Name	Number	100	150	200	250	300	350	400	450	500	550	600
X2CrNiN18-7	1.4318	530	490	460	450	440	430	-	-	-	-	-

高温下的最小屈服强度

高温下的最小抗拉强度

热处理指南