GB 18248 tiyo asye san pwoblèmse sitou itilize pou fabrike silenn gaz segondè-presyon, ak materyèl li yo anjeneral 37Mn, 34Mn2V, 30CrMo, 35CrMo, elatriye. delaminasyon ak sikatris.
Espesifikasyon yo nan 37Mn tiyo asye san pwoblèm yo jeneralman 57mm ~ 720mm an dyamèt ekstèn ak 3mm ~ 120mm nan epesè miray la. Pwa livrezon 34Mn2V tiyo asye kabòn ka kalkile ki baze sou pwa aktyèl oswa pwa teyorik. Pwa teyorik la kalkile an akò ak règleman GB/T17395. Anplis de sa, 30CrMo tib silenn gaz san pwoblèm yo ta dwe tou konfòme yo ak kondisyon ki nan TSGD 7002-2006 "Type Tès Règ pou Konpozan tiyo Presyon".

GB 18248 Tib silenn gaz Estanda sa a aplikab a fabrike tib asye san pwoblèm pou silenn gaz ak kokiy akimilatè.
Mak: 37Mn, 34Mn2V, 30CrMo, 35CrMo, 34CrMo4, 30CrMnSiA
Dyamèt deyò: 48 - 711 mm
Pwa: 3.1 - 38mm
Longè: 4-12m
Estati livrezon: pa chalè trete, trempe ak tanperaman + trempe ak tanperaman, nòmalize + tanperaman

Konpozisyon chimik GB/T 18248 Tib asye san pwoblèm

Klas	C	Si	Mn	P	_Sb	P＋S	Kr	Mo	V	Ni	Cu
37Mn	0.34 - 0.40	0.10 - 0.30	1.35 - 1.75	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.030	Mwens pase oswa egal a 0.30	－	－	Mwens pase oswa egal a 0.30	Mwens pase oswa egal a 0.20
34Mn2V	0.30 - 0.37	0.17 - 0.37	1.40 - 1.75	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.030	Mwens pase oswa egal a 0.30	－	0.07 - 0.12	Mwens pase oswa egal a 0.30	Mwens pase oswa egal a 0.20
30CrMo	0.26 - 0.34	0.17 - 0.37	0.40 - 0.70	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.030	0.80 - 1.10	0.15 - 0.25	－	Mwens pase oswa egal a 0.30	Mwens pase oswa egal a 0.20
35CrMo	0.32 - 0.40	0.17 - 0.37	0.40 - 0.70	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.030	0.80 - 1.10	0.15 - 0.25	－	Mwens pase oswa egal a 0.30	Mwens pase oswa egal a 0.20
34CrMo4	0.30 - 0.37	Mwens pase oswa egal a 0.40	0.60 - 0.90	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.030	0.90 - 1.20	0.15 - 0.30	－	Mwens pase oswa egal a 0.30	Mwens pase oswa egal a 0.20
30CrMnSiA	0.28 - 0.34	0.90 - 1.20	0.80 - 1.10	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.020	Mwens pase oswa egal a 0.030	0.80 - 1.10	Mwens pase oswa egal a 0.10	－	Mwens pase oswa egal a 0.30	Mwens pase oswa egal a 0.20

Pwopriyete mekanik GB/T 18248 30CrMo gaz silenn tiyo asye

Estanda	Klas	Fòs rupture (MPa)	Sede fòs (MPa)	elongasyon (%)
GB 18248	37Mn	Pi gran pase oswa egal a 750	Pi gran pase oswa egal a 630	Pi gran pase oswa egal a 16
	34Mn2V	Pi gran pase oswa egal a 745	Pi gran pase oswa egal a 530	Pi gran pase oswa egal a 16
	30CrMo	Pi gran pase oswa egal a 930	Pi gran pase oswa egal a 785	Pi gran pase oswa egal a 12
	35CrMo	Pi gran pase oswa egal a 980	Pi gran pase oswa egal a 835	Pi gran pase oswa egal a 12
	34CrMo4	Pi gran pase oswa egal a 980	Pi gran pase oswa egal a 835	Pi gran pase oswa egal a 12
	30CrMnSiA	Pi gran pase oswa egal a 1080	Pi gran pase oswa egal a 885	Pi gran pase oswa egal a 10

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