Ray asye, yo rele tou ray tren, yo itilize prensipalman pou ray tren nan sistèm transpò. Yo se yon eleman kle nan sistèm tren yo, ki bay yon tren ki estab ak dirab pou tren pasaje yo, tren machandiz, ak rezo tren gwo-oswa metwo.

Ki kalite asye yo itilize nan ray?
Rail yo itilize prensipalman asye kabòn ki wo -, souvan alyaj ak Manganèz pou dite siplemantè ak rezistans mete, epi pafwa yo trete chalè {-(tèt-fè tèt di) pou zòn ki gen gwo-estrès tankou koub, ak klas komen ki gen ladan u71mn, u75v, R260 ak R350HT, ki fèt ak fòs, durability, ak rezistans.
Kalite kle Rail Steel:
- Segondè -Kabòn Steel (Pearlitic Steel): baz ki pi komen, ki ofri bon fòs ak dite pa balanse fè ak kabòn (anviwon 0.4% a 0.8% kabòn).
- Manganèz Steel: Gen manganèz te ajoute, ki ede sifas la travay-di, vin trè difisil ak usure-sou enpak wou yo.
- Chalè-Asye Trete (Tèt-Fè di): Se chalè-trete tèt ray la pou dite maksimòm ak rezistans mete, enpòtan anpil pou gwo-vitès oswa gwo- liy trafik.
- Alloy Steels: Steel ak eleman ajoute tankou Kwòm (R320Cr) oswa vanadyòm pou amelyore pèfòmans, fòs, ak rezistans fatig.

| Steel Klas | C(%) | Si | Mn | Kr | V | P | S | Fòs rupture (Rm/MPa) |
| U71Mn | 0.65~0.76 | 0.15~0.58 | 0.70~1.40 | – | – | Mwens pase oswa egal a 0.035 | Mwens pase oswa egal a 0.030 | Pi gran pase oswa egal a 880 |
| U75V | 0.71~0.80 | 0.50~0.80 | 0.75~1.05 | – | 0.04~0.12 | Mwens pase oswa egal a 0.035 | Mwens pase oswa egal a 0.030 | Pi gran pase oswa egal a 980 |
| U78CrV | 0.72~0.82 | 0.50~0.80 | 0.70~1.05 | 0.30~0.50 | 0.04~0.12 | Mwens pase oswa egal a 0.035 | Mwens pase oswa egal a 0.030 | Pi gran pase oswa egal a 1080 |
| U77MnCr | 0.72~0.82 | 0.10~0.50 | 0.80~1.10 | 0.25~0.40 | – | Mwens pase oswa egal a 0.035 | Mwens pase oswa egal a 0.025 | Pi gran pase oswa egal a 980 |
| U76CrRE | 0.71~0.81 | 0.50~0.80 | 0.80~1.10 | 0.25~0.35 | 0.04~0.08 | Mwens pase oswa egal a 0.035 | Mwens pase oswa egal a 0.025 | Pi gran pase oswa egal a 1080 |
Ki jan ray tren yo fabrike?
Rail tren yo fabrike atravè yon pwosesis asye, depoze kontinyèl nan dal (flores), ki te swiv pa woule cho nan machin espesyalize ki fòme asye a nan I-pwofil gwo bout bwa tren an (tèt, entènèt, baz), epi finalman, etap fini tankou refwadisman kontwole, redresman, koupe, epi souvan tretman chalè (trempe ak tanperaman souvan ak tanperaman){1} pou tras san pwoblèm.

NanGNEE RAIL, nou espesyalize nan bay yon seri konpozan tren konplè, ki gen ladan tren lou, ray limyè, tren teknik ak fixation ray, osi byen ke matche klip tren ki gen gwo -pèfòmans ak solisyon fixation. Apiye pa kontwòl kalite strik ak sètifikasyon endistri, pwodwi nou yo Enjenieri satisfè estanda entènasyonal yo ak demand divès pwojè.
| Klasifikasyon | Wotè (mm) | Tèt (mm) | Anba (mm) | Epè (mm) | Pwa (kg/m) | |
| Limyè tren | 8 KG/M | 65 | 25 | 54 | 7 | 8.42 |
| 9 KG/M | 63.5 | 32.1 | 63.5 | 5.9 | 8.94 | |
| 12 KG/M | 69.85 | 38.1 | 69.85 | 7.54 | 12.2 | |
| 15 KG/M | 79.37 | 42.86 | 79.37 | 8.33 | 15.2 | |
| 18 KG/M | 80 | 40 | 80 | 10 | 18.06 | |
| 22 KG/M | 93.66 | 50.8 | 93.66 | 10.72 | 22.3 | |
| 24 KG/M | 107 | 51 | 90 | 10.9 | 24.46 | |
| 30 KG/M | 107.95 | 60.33 | 107.95 | 12.3 | 30.1 | |
| Rail lou | 38 KG/M | 134 | 68 | 114 | 13 | 38.733 |
| 43 KG/M | 140 | 70 | 114 | 14.5 | 44.653 | |
| 45 KG/M | 145 | 67 | 126 | 14.5 | 45.546 | |
| 50 KG/M | 152 | 70 | 132 | 15.5 | 51.514 | |
| 60 KG/M | 176 | 73 | 150 | 16.5 | 60.64 | |
| Rail teknik | QU 70 | 120 | 70 | 120 | 28 | 52.8 |
| QU 80 | 130 | 80 | 130 | 32 | 63.69 | |
| QU 100 | 150 | 100 | 150 | 38 | 88.96 | |
| QU 120 | 170 | 120 | 170 | 44 | 118.1 | |






