Qib 431 stainless hlau yog martensitic, cua sov- qib kho tau

Cov khoom tseem ceeb

Cov khoom tshwj xeeb yog rau cov khoom lag luam bar hauv ASTM A276. Cov khoom yuav tsis tas yuav zoo ib yam li lwm cov ntaub ntawv xws li forgings thiab daim hlau.

Kev sib xyaw

Table 1. Kev sib xyaw ua ke ntawm qib 431 stainless hlau

Qib		C	Mn	Si	P	S	Cr	Ni
431	min. max.	- 0.20	- 1	- 1	- 0.04	- 0.03	15 17	1.25 2.50

Mechanical Properties

Rooj 2. Mechanical zog ntawm qib 431 stainless hlau

Tempering kub (degree)	Tensile zog (MPa)	Yield Strength 0.2% Pov thawj (MPa)	Elongation (% hauv 50mm)	Hardness Brinell (HB)	Impact Charpy V (J)
Annealed *	862	655	20	max 285 hli	-
204	1345	1055	20	388	50
316	1295	1035	19	375	53
427	1350	1080	19	388	#
538	1140	965	19	321	#
593	1015	770	20	293	64
650	960	695	20	277	84

Qib 431 feem ntau khaws thiab muab tso rau hauv "Txoj Cai T", nrog rau lub zog tensile ntawm 850 - 1000MPa.

* Annealed tensile zog yog ib yam rau mob A ntawm ASTM A276; annealed hardness yog qhov siab tshaj plaws. Qib 431 tsuas yog tsis tshua muaj nyob rau hauv annealed Condition A.

# Qib 431 yuav tsum tsis txhob tempered ntawm 425 thiab 600 degree, vim muaj kev cuam tshuam tsis zoo cuam tshuam nrog qhov kub thiab txias.