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Steel PT70

A4 steel Steel 76F 76KhSF steel Steel 76C (M76C) 78KhSF steel Steel 90AF (E90AF) Steel A1 (A0) A2 steel A3 steel Steel 76VT (M76VT) Steel wheel 1 Steel wheel 2 Steel wheel 3 Steel M75 Steel H50 OS Steel PT70 steel T60 steel Steel 70 (M70) Steel 2 Steel 3 3Gps steel Steel 4 Steel 54 (M54) 5Gps steel Steel 63 (K63) Steel 68 (M68) 76T steel Steel 73B (M73B) Steel 73T (M73T) Steel 73C (M73C) Steel 74 (M74) Steel 74T (M74T) Steel 74C (M74C) Steel 76 (M76) Steel 76B (M76B)

Designation

Name The value
Designation GOST Cyrillic ПТ70
Designation GOST Latin PT70
Transliteration PT70
The chemical elements PTi70

Description

Steel PT70 is used: for the manufacture of rails type R18 and R24 designed for installation on the Railways narrow gauge.

Note

Steel for the manufacture of rails is made with a degree of deoxidation SP (calm).

Standards

Name Code Standards
Rails. Lining. Lining. Crutches В42 GOST 5876-82, GOST 6368-82

Chemical composition

Standard C S P Mn Si Fe As
GOST 5876-82 0.67-0.82 ≤0.045 ≤0.04 0.5-1.4 ≥0.13 The rest 0.15
Fe is the basis.
According to GOST 5876-82 in the steel smelted on the basis of Kerch ores, a mass fraction of sulfur and phosphorus is allowed up to 0.050%. With a mass fraction of carbon above 80%, the mass fraction of manganese in the PT70 grade steel should not exceed 1.05%.

Mechanical characteristics

Section, mm σB, MPa Brinell hardness number, MPa
Mechanical properties of steel for rails PT70 type R18 and R24 according to GOST 5876-82 on delivery
≥740 ≥250

Description mechanical marks

Name Description
Section Section
σB Limit short-term strength

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